Full Text
CG-DL-E-06012024-251208
EXTRAORDINARY
PART II—Section 3—Sub-section (i)
145 GI/2024
(1)
MINISTRY OF ROAD TRANSPORT AND HIGHWAYS
NOTIFICATION
New Delhi, the 5th January, 2024
G.S.R. 27(E).— Whereas, the draft of certain rules further to amend the Central Motor Vehicles Rules,
1989 were published, as required under sub-section (1) of section 212 of the Motor Vehicles Act, 1988 (59 of
1988), vide notification of the Government of India in the Ministry of Road Transport and Highways number G.S.R.
352(E), dated the 8th May, 2023, in the Gazette of India, Extraordinary, Part II, Section 3, Sub-section(i),
inviting objections and suggestions from all persons likely to be affected thereby before the expiry of the period of
thirty days from the date on which copies of the Gazette containing the said notification were made available to the
public;
And whereas copies of the said notification were made available to the public on the 9th May, 2023;
And whereas objections and suggestions received from the public in respect of the said draft rules have been
duly considered by the Central Government;
Now, therefore, in exercise of the powers conferred by section 110 of the Motor Vehicles Act, 1988
(59 of 1988), the Central Government hereby makes the following rules further to amend the Central Motor
Vehicles Rules, 1989, namely:-
1. (1) These rules may be called the Central Motor Vehicles (First Amendment) Rules, 2024.
(2) They shall come into force on the date of their publication in the Official Gazette.
2. In the Central Motor Vehicle Rules, 1989, in rule 115,-
(1) in sub-rule (18),-
(a) in clause (i),-
(i) in TABLE 1, paragraphs (3) and (4) shall be renumbered as paragraphs (1) and (2) respectively;
(ii)for TABLE 2, the following TABLE, shall be substituted, namely:-
“TABLE 2
Emission Standards For Vehicles of Category M and N with gross weight not exceeding 3000 Kg-
APPLICABILITY OF TEST REQUIREMENTS FOR TYPE-APPROVAL-BS-VI
| | Vehicle with Positive Ignition Engines including Hybrids | | | | | | | | | | Vehicles with Compression Ignition Engines including Hybrids | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| | Mono fuel | | | | | | Bi-Fuel (1) | | | Flex Fuel (1) | Mono Fuel | | Dual Fuel | Flex Fuel |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) |
| Reference Fuel | Gasoline[(E10)/(E20)](7) | Ethanol (E100) | LPG | CNG/Bio- Methane/Bio- Gas/LNG | Hydrogen (ICE)(3) | HCNG (Hydrogen+CN) | Gasoline [(E10)/(E)] (1) (7) | Gasoline [/(E10)/ (E20)](1) (7) | Gasoline [(E10)/(E20)] (1) (7) | Ethanol (E20) | Diesel (B7) (5) | Bio- Diesel (B10) | Diesel +CNG | Bio- Diesel (B7) |
| | | | | | | | LPG | CNG/Bio- Methane | Hydrogen(ICE)(3) | (E85 ) | | | | (B10) (5) |
| Gaseous pollutant (Type I test) | Yes | Yes | Yes | Yes | Yes (2) | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes |
| Particulate Mass and Particulate Number (Type I Test) | Yes4 | Yes4 | - | - | - | - | Yes (4) E10 (or) E20 | Yes (4) E10 (or) E20 | Yes (4) E10 (or) E20 | Yes (4) (both fuels) | Yes | Yes | Yes | Yes |
| Idle Emissions (Type II | Yes | Yes | Yes | Yes | - | Yes | Yes (both fuels) | Yes (both fuels) | Yes E10 (or) E20 | Yes (both fuels) | - | - | - | - |
| Test) | | | | | | | | | | | | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Crankcase Emissions (Type III Test) | Yes | Yes | Yes | Yes | - | Yes | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes (E20 only) | - | - | - | - |
| Evaporative Emissions (Type IV test) | Yes | Yes | - | - | - | - | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes (E20 only) | - | - | - | - |
| Durability (Type V Test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes (E20 only) | Yes | Yes | Yes | Yes (B7 only) |
| In-Service Conformity | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes E10 (or) E20 | Yes (both fuels) | Yes | Yes | Yes | Yes (B7 only) |
| On-Board Diagnostics and IUPRm | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| CO2 emission and fuel consumptio n (6) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes (both fuels) |
| Smoke Opacity | - | - | - | - | - | - | - | - | - | - | Yes | Yes | Yes | Yes |
| Engine Power | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes |
| RDE gaseous emissions test applicabilit y | Yes | Yes | Yes | Yes | Yes (2) | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes |
| RDE PN emissions test applicabilit y (4) | Yes | Yes | - | - | - | - | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes E10 (or) E20 | Yes (both fuels) | Yes | Yes | Yes | Yes |
(1) When a bi-fuel vehicle has flex fuel option, both test requirements are applicable.
(2) Only NOx emissions shall be determined when the vehicle is running on Hydrogen.
(3) Reference Fuel is ’Hydrogen for Internal Combustion Engine’ as specified in Annexure- IV-W.
(4) Particulate mass and number limits for vehicles with positive ignition engines including hybrids shall apply
only to vehicles with direct injection engines.
(5) Vehicle fuelled with Bio diesel blends up to 7% will be tested with reference diesel (B7) and vehicles fuelled
with Bio diesel blends above 7% will be tested with respective blends.
(6) CO2 emission and fuel consumption shall be measured as per procedure laid down in AIS 137 and as
amended time to time.
(7) Manufacturers shall select one of the following fuels, namely:- Reference Gasoline (E10) or Reference
GsolineE20 fuel for Type Approval and conformity of production test as per applicability.
Notes.-
(1) the test shall be on Chassis Dynamometer.
(2) The test including driving cycle shall be as provided under sub-rule (10) with the modifications that,-
(i)
the exhaust gas sampling should start at the intimation of the engine start up procedure referred to in
Annexure IV-E and as amended from time to time as per AIS-137-;
(ii) the driving cycle shall be at a maximum speed of 90km per hour referred to in Annexure-IV-E and
as per AIS 137.
(3) there shall be no relaxation of norms for conformity of production (CoP) purpose and procedure for
compliance shall be as per AIS-137 as amended from time to time.
(4) Specifications for Reference Fuels shall be as below:-
(a)
Reference natural gas fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall
be as per Annexure-IV-L (G20, G23 and G25).
(b)
Reference LPG fuel used in LPG mono fuel or bi-fuel vehicles shall be as per Annexure-IV-M (Fuel
A and Fuel B), However, in case of non-availability of reference fuels for CNG or LPG, the
commercially available CNG as per BIS 15958:2012 and LPG as per BIS 14861:2000 as amended
from time to time shall be used for the purpose of Type approval and conformity of production.
(c)
The reference ethanol fuel (E85) shall be as per the Annexure-IV-Q.
(d) The reference Gasoline fuels E10 (as specified by the manufacturer), shall be as specified in
Annexur-IV-XA.
(e) The reference Diesel fuel (B7) shall be as specified in Annexure-IV-T.
(f)
The reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013 and as amended time to
time.
(g) The reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314:2019 and as amended from time to time.
(h) BS-VI Hydrogen Fuel vehicles shall be tested with reference fuel specified in the Annexure-IV-W to
said rules.
(i)
The reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314:2019 and as amended from time to time.
(j)
In case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 as amended from time to time shall be used for the purpose of Type approval and
conformity of production.
(k) The reference E20 fuel (20 per cent. of Ethanol in Gasoline) shall be as per IS 17943: 2022 and as
amended from time to time by BIS.
(l)
The reference B100 fuel shall be as per Annexure-IV-S and as amended from time to time by BIS.
(5)
Crankcase ventilation system shall not permit the emission of any of the crankcase gases in to the
atmosphere.
(6)
Evaporative emission shall not be more than 2.0g/test from Gasoline fuelled vehicles. The evaporative
emission test procedure for gasoline fuelled vehicles shall be as per the procedure specified in AIS-137.
(7) The conformity of production (CoP) testing procedure shall be as described in AIS-137.
(8) Conformity of production (CoP) frequency and samples as under, namely:-
(i)
the conformity of production period for each vehicle model including its variants shall be once a
year;
(ii) where production volume in six months is less than 250 per model including its variants, the
provisions contained in the provisions to rule 126-A shall apply;
(iii) all these tests shall be conducted with the reference fuel as specified in this sub-rule:
Provided that, at the manufacturers request, test may be carried out with commercial fuel;
(iv) for vehicles approved as per this sub-rule, at least 50 per cent. of vehicle models, rounded to nearest
integer value, produced from particular plant per year shall be selected randomly from dealers
location or warehouse.
(9) Specifications for Commercial Fuels as under, namely:-
(i)
the commercial Gasoline fuel shall be as per Annexure-IV-U and as amended from time to time;
(ii)
specifications for commercial CNG and commercial LPG shall be in accordance with BIS
15958:2012 and as per BIS 14681:2000 respectively and as amended from time to time;
(iii) Biodiesel used in commercial diesel shall be as per IS 15607 as amended from time to time;
(iv) specifications for commercial diesel fuel shall be as per Annexure-IV-V and as amended from time
to time;
(v)
specification for commercial fuel E85 (blend of 85 per cent. of Ethanol in Gasoline) shall be as per
IS 16634:2017 and as amended time to time by BIS;
(vi) specifications for commercial Biogas (Bio-Methane) shall be as per IS:16087:2013 and as amended
from time to time;
(vii) specifications for Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314:2019 and as amended from time to time;
(viii) specification for commercial ethanol fuel (E20) shall be as per IS 17021: 2018;
(ix) specification for commercial fuel E100 shall be as per IS 17821:2022 and as amended time to time.
(10)
Specifications of NOx reduction agent AUS 32 (Aqueous Urea Solution) shall conform to Part 1 and Part
2 of ISO 22241-2006 or DIN V 70070 or IS:17042:Part1 and Part 2: 2020.
(11)
For diesel vehicles, the emission of visible pollutants (smoke) shall not exceed the limit value of smoke
density, when expressed as light absorption coefficient for various nominal flows as given in Annexeure-1
to sub-rule (9) of rule 115 when tested at constant speeds over the full load. These smoke limits are
without correction factor and engines are to be tested with conditioned air supplied to the engine to
maintain atmospheric factor at 0.98 to 1.02.
(12)
The engine power shall be measured on engine dynamometer and the measured power shall conform to
the power specified in AIS-137 as amended from time to time, when tested as per the procedures laid
down in AIS-137.
(13)
Type-II test, vehicles fitted with PI engines shall comply with the provisions of clause (i) of sub-rule (2)
of rule 115 as applicable.
(14)
Free acceleration Smoke, Vehicles fitted with CI engines shall comply with the provisions of clause (ii) of
sub-rule (2) of rule 115 as applicable.
(15)
Deterioration Factor shall be as given in the following Table, namely:-
| | Table Deterioration Factor shall be as given below :BS- VI | | | | | | | |
|---|---|---|---|---|---|---|---|---|
| Sl.No. | Engine Category | Assigned Deterioration Factor | | | | | | |
| | | CO | THC | NMHC | NOx | HC+NOx | Particulate Matter (PM) | Particulate Number (PN) |
| | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| (1) | Positive Ignition | 1.5 | 1.3 | 1.3 | 1.6 | -- | 1.0 | 1.0 |
| (2) | Compression Ignition | 1.5 | -- | -- | 1.1 | 1.1 | 1.0 | 1.0 |
Notes.-
(i)
Alternatively, the vehicle manufacturer may opt for a vehicle ageing test of 1,60,000 km or bench
ageing durability test, for evaluating the deterioration factor as per AIS-137 and as amended from
time to time;
(ii) This test may be performed by driving vehicle on a test track, on the road, or on a chassis
dynamometer or Engine test bench as per AIS 137;
(iii) The maximum lap speed at 10th Lap and at 11th Lap shall be 72 km per hour and 90km per hour
respectively;
(iv) The above ageing test should be carried out by the approved test agency specified under rule 126.
(16)
The vehicles shall be equipped with On-Board Diagnostic (BS VI-OBD) systems for emission control
which shall have the capability of identifying the likely area of malfunction by means of fault codes
stored in computer memory as per the procedure laid down in AIS-137 and when that failure results in an
increase in emission above the limits given in the following Table below, namely:-
| | Table 1 On-Board Diagnostic (BS-VI- OBD-I) Threshold : BS-VI | | | | | | | | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| | | | Reference mass (RM) (kg) | CO (mg/km) | | NMHC (mg/km) | | NOx (mg/km) | | PM (mg/km) | |
| | Category | Class | | PI | CI | PI | CI | PI | CI | PI(1) | CI |
| | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
| (1) | M(M1 and M2) | -- | All | 1900 | 1750 | 170 | 290 | 150 | 180 | 25 | 25 |
| (2) | N1 | I | RM≤1305 | 1900 | 1750 | 170 | 290 | 150 | 180 | 25 | 25 |
| (3) | | II | 1305<RM≤ 1760 | 3400 | 2200 | 225 | 320 | 190 | 220 | 25 | 25 |
| (4) | | III | 1760<RM | 4300 | 2500 | 270 | 350 | 210 | 280 | 30 | 30 |
| (5) | N2 | -- | All | 4300 | 2500 | 270 | 350 | 210 | 280 | 30 | 30 |
| | Explanatory Notes to superscript- (1) For positive ignition, particulate mass limits apply only to vehicles with direct ignition engines | | | | | | | | | | |
(ii)
OBD Threshold for BS-VI vehicles manufactured on or after 1st April,2023:
| | Table 2 On-Board Diagnostic (BS-VI OBD-II) Threshold: BS-VI | | | | | | | | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sl. No. | | | Referenc e Mass (RM) (kg) | CO (mg/km) | | NMHC (mg/km) | | NOx (mg/km) | | PM (mg/km) | |
| | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
| (1) | Category | Clas s | | PI | CI | PI | CI | PI | CI | PI (1) | CI |
| (2) | M (M1 and M2) | - | All | 1900 | 1750 | 170 | 290 | 90 | 140 | 12 | 12 |
| (3) | N1 | I | RM≤130 5 | 1900 | 1750 | 170 | 290 | 90 | 140 | 12 | 12 |
| (4) | | II | 1305<R M≤1760 | 3400 | 2200 | 225 | 320 | 110 | 180 | 12 | 12 |
| (5) | | III | 1760<R M | 4300 | 2500 | 270 | 350 | 120 | 220 | 12 | 12 |
| (6) | N2 | | All | 4300 | 2500 | 270 | 350 | 120 | 220 | 12 | 12 |
| | Explanatory Notes to superscript- (1) For positive ignition, particulate mass apply only to vehicles with direct ignition engines | | | | | | | | | | |
(17) In-use performance ratio (IUPR) for BS-VI vehicles manufactured on or after 1st April, 2023, the in-use
performance ratio (IUPR) of a specific monitor M of the OBD systems shall be:
IUPRM = Numerator / Denominator
(i)
Compression of Numerator and Denominator gives an indicator of how often a specific monitor is
operating relative to vehicle operation. Detailed requirements for tracking IUPR are as given in AIS
137.
(ii)
If, according to the requirements specified in AIS-137, the vehicle is equipped with a specific
monitor M, IUPRM shall be greater or equal to 0.1 for all monitors M.
(18) In service compliance of vehicles shall be as per procedure laid down in AIS-137.
(19) (a) During type approval and COP applicable from 1st April, 2020, real world driving cycle emission
measurement using Portable Emissions Measurement System (PEMS) shall be carried out for data
collection and for vehicles of category M and N having gross vehicle weight not exceeding 3500 kgs,
manufactured on or after 1st April, 2023, for all models, during real world driving cycle emission
measurement using PEMS, Conformity factor shall be applicable as per the procedure laid down in
AIS 137.
(b)
During the type approval, the Conformity factor (CF), shall be as per the Table below, namely:-
Table: Conformity Factor (CF)
| Sl. No. | Pollutant (1) | CFpollutant (2) |
|---|---|---|
| (1) | NOx | 1 + margin (3) NOx With margin NOx = 0.43 |
| (2) | (1) PN | 1 + margin (3) PN With margin PN = 0.5 |
| (3) | (2) CO | - |
Explanatory Notes to superscripts-
(1) Applicable for: Positive Ignition (Direct Injection) engines and Compression Ignition Engines only;
(2) CO emissions shall be measured and recorded at RDE tests;
(3) Margin is a parameter taking into account considering the additional measurement uncertainties
introduced by the PEMS equipment.
| For the type approval purposes, all models type approved as per the Central Motor Vehicles (fourth | |
|---|---|
| | Amendment) Rules , 2021 published in the Official Gazette vide notification number G.S.R. 156 (E) |
dated 08 March 2021, need not to be re type approved for compliance to this sub-rule. All those vehicle
or engine manufacturers, who have obtained certifications as per G.S.R. 156 (E) dated 08 March 2021,
may not apply for compliance once again.”;
(b) in clause (ii), for TABLE 2, the following TABLE shall be substituted, namely:-
“TABLE 2
Emission Standards for vehicles of category M and N having gross weight exceeding 3500 Kg- for
APPLICABILITY OF TEST REQUIREMENTS FOR TYPE-APPROVAL-BS-VI
| | Positive Ignition Engines | | | | | | | Compression Ignition Engines | | | | Dual Fuel Engines |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) |
| Reference Fuel | Mono-fuel | | | | | | Flex-fuel | Mono fuel | | | Flex fuel | |
| | Gasoline (E10)/ (E20) (6) | Ethanol (E100) | LPG | CNG/Bio- Methane/ Bio- Gas/LNG | Hydrogen (ICE) (3) (4) | HCNG (Hydrogen+CNG) | Ethanol (E20) | Diesel (B7) (1) | Bio- Diesel 100% | Ethanol (ED 95) | Bio-Diesel (B7) | Diesel (B7) + (CNG/LNG) (2) |
| | | | | | | | (E85) | | | | (B100) (1) | |
| Gaseous pollutant | Yes | Yes | Yes | Yes | Yes (5) | Yes | Yes (Both fuels) | Yes | Yes | Yes | Yes | Yes (2) |
| Particulate Mass | Yes | Yes | Yes | Yes | Yes | Yes | Yes (Both fuels) | Yes | Yes | Yes | Yes | Yes (2) |
| PM Number | Yes | Yes | Yes | Yes | Yes | Yes | Yes (Both fuels) | Yes | Yes | Yes | Yes | Yes (2) |
| Durability | Yes | Yes | Yes | Yes | Yes | Yes | Yes (E20) | Yes | Yes | Yes | Yes | Yes (2) |
| OBD | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes (2) |
| Off Cycle Emissions (WNTE) | --- | --- | --- | --- | --- | --- | --- | Yes | Yes | Yes | Yes | Yes (2) |
| PEMS Demonstration Test at Type Approval | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes | Yes | Yes | Yes | Yes (2) |
| In-Service Conformity | Yes | Yes | Yes | Yes | Yes | Yes | Yes (Both Fuels) | Yes | Yes | Yes | Yes (B7 only) | Yes (2) |
Explanatory Notes to superscripts-
(1)
The vehicles or engines fuelled with bio diesel blends up to 7 per cent. shall be tested with reference
diesel (B7) and vehicles fuelled with bio diesel blends above 7 per cent. shall be tested with
respective blends.
(2)
The test applicability requirements for dual fuel engine is depending on the Gas Energy Ratio
(GER) measured over the hot part of the World Harmonised Transient Cycle (WHTC) test-cycle.
GER classification shall be as per AIS: 137.
(3)
Reference Fuel is ‘Hydrogen for BS-VI Positive Ignition Engine’ as specified in Annexure-IV-W.
(4)
Reference Fuel is ‘Hydrogen for BS-IV Positive Ignition Engine’ as specified in Annexure-IV-ZD.
(5)
Only NOx emission shall be determined when the vehicle is running on Hydrogen.
(6)
Manufacturers shall select one of the following fuels, namely:- Reference Gasoline (E10) or
Reference Gasoline (E20) for Type Approval and Conformity of Production test as per applicability.
Notes.-
(1)
The test shall be done on engine dynamometer.
(2)
In case of vehicles equipped with Compression Ignition engines, the gaseous and particulate emission
shall be measured as per WHSC and WHTC cycles as per procedure described in AIS 137 as amended
from time to time.
(3)
In case of vehicles equipped with positive ignition engines, the gaseous and particulate emissions shall be
measured as per WHTC cycle as per procedure described in AIS 137 and as amended from time to time.
(4)
Specifications for Reference fuels are as below, namely:-
(a)
reference natural gas, fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall
be as per Annexure IV-L (G20, G23 and G25);
(b)
reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be as per Annexure-IV-M (Fuel
A and Fuel B), however, in case of non-availability of reference fuels for CNG or LPG, the
commercially available CNG as per BIS 15958:2012 and LPG as per BIS 14861:2000 as amended
from time to time shall be used for the purpose of type approval and conformity of production;
(c)
the reference ethanol fuel (ED95) shall be as specified in Annexure-IV-R;
(d)
the reference Diesel fuel (B7) shall be as specified in Annexure-IV-T;
(e)
the reference fuel Biogas (Bio-Methane) shall be as per IS 16087:2013 and as amended time to time;
(f)
the reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314:2019 and as amended from time to time;
(g)
the reference E20 fuel (20 per cent. of Ethanol in Gasoline) shall be as per IS 17943: 2022 and as
amended from time to time by BIS;
(h)
the reference E85 fuel (85 percent of Ethanol in Gasoline) shall be as per the Annexure-IV-Q.”
(Standard number will be created and specified by BIS);
(i)
the reference B100 fuel shall be as per Annexure-IV-S and as amended from time to time.”
(Standard number will be created and specified by BIS);
(j)
in case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 as amended from time to time shall be used for the purpose of type approval and
conformity of production.
(5) The conformity of production (CoP) testing procedure shall be as described in AIS-137.
(6) The conformity of production (CoP) frequency and samples shall be as under, namely:-
(i)
the conformity of production period for each engine model including its variants shall be once a
year;
(ii)
where production volume in six months is less than 250 per model including its variant(s), the
provisions contained in the provisos to rule 126-A shall apply.
(7) Specifications for Commercial fuels shall be as under, namely:-
(a)
the Commercial Gasoline fuel shall be as per Annexure IV-U;
(b)
specifications for commercial CNG and commercial LPG shall be in accordance with BIS
15958:2012 and as per BIS 14861:2000 respectively;
(c)
biodiesel used in commercial Diesel shall be as per IS 15607;
(d)
specifications for commercial Diesel fuel up to 7 per cent. of bio diesel blend shall be as per
Annexure IV-V;
(e)
specifications for commercial ED95 shall be as specified in accordance with the Indian Standards;
(f)
specifications for commercial Biogas (Bio-Methane) shall be as per IS 16087:2013;
(g)
specifications for commercial Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per
IS 17314:2019;
(h)
specification for commercial fuel E20 (20 per cent of Ethanol in Gasoline) shall be as per IS 17021:
2018;
(i)
specification for commercial Ethanol fuel E85 (85 per cent. of Ethanol in Gasoline) shall be as per
IS 16634:2017;
(j)
specification for commercial fuel E100 shall be as per IS 17821:2022.
(8) For compression ignition (CI) engine vehicles, the emission of visible pollutants (Smoke) shall not exceed
the limit value of smoke density, as per Annexure-I to sub-rule (9) of rule 115. These smoke limits are
without correction factor and engines are to be tested with conditioned air supplied to the engine to
maintain atmospheric factor of 0.98 to 1.02.
(9) The engine power shall be measured on engine dynamometer and the measured power shall conform to the
power specified and tested as per procedures prescribed in AIS-137.
(10) Idle emissions and smoke density shall be as under, namely:-
(a) the vehicle equipped with PI engine specified in this sub-rule shall comply with the provisions of
clause (i) of sub-rule (2) of rule 115;
(b) the vehicle equipped with CI engine specified in this sub-rule shall comply with the provisions of
clause (ii) of sub-rule (2) of rule 115.
(11) Deterioration Factors.-
(i) Deterioration factors shall be as given in the Table below, namely:-
| | Table 1 Deterioration Factor for BS VI | | | | | | | | |
|---|---|---|---|---|---|---|---|---|---|
| | Test cycle | CO | THC1 | NMHC1 | CH 1 4 | NOx | NH 3 | PM mass | PM number |
| | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
| (1) | WHTC | 1.3 | 1.3 | 1.4 | 1.4 | 1.15 | 1.0 | 1.05 | 1.0 |
| (2) | WHSC | 1.3 | 1.3 | ---- | ---- | 1.15 | 1.0 | 1.05 | 1.0 |
Explanatory Notes to superscripts-
(1) applies in case of a compression ignition engine.
(2) applies in case of a positive ignition engine.
(ii) Alternatively, the vehicle manufacturers may opt for evaluation of deterioration factor over normal
useful life period as per procedure described in AIS 137 and useful life period and minimum service
accumulation period for evaluation of deterioration factor given in Table below, namely:-
| Sl. No. | Table 2 Minimum service accumulation period – BS-VI | | |
|---|---|---|---|
| | (1) | (2) | (3) |
| (1) | Category of vehicle in which engine will be installed | Useful life period | Minimum service accumulation period |
| (2) | Category N1 vehicles | 1,60,000km or 5 years | 1,60,000 km |
| (3) | Category N2 vehicles | 3,00,000 km or 6 years | 1,88,000 km |
| (4) | Category N3 vehicles with GVW equal to or less than 16,000 kg | 3,00,000 km or 6 years | 1,88,000 km |
| (5) | Category N3 vehicles with GVW above 16,000 kg | 7,00,000 km or 7 years | 2,33,000 km |
| (6) | Category M2 vehicles | 1,60,000 km or 5 years | 1,60,000 km |
| (7) | Category M3 vehicles with GVW equal to or less than 7500 kg | 3,00,000 km or 6 years | 1,88,000 km |
| (8) | Category M3 vehicles with GVW above 7500 kg | 7,00,000 km or 7 years | 2,33,000 km |
| (9) | The evaluation of deterioration factor shall be carried out by the approved test agency specified in rule 126 | | |
(a) During type approval and COP applicable from 1st April, 2020, emission measurement on vehicles using
Portable Emissions Measurement System (PEMS) shall be carried out on road for data collection and for
category M and N vehicles having gross vehicle weight exceeding 3500 kgs, manufactured on or after
1st April, 2023, for all models, during real world driving cycle emission measurement using Portable
Emissions Measurement System (PEMS), in-service conformity factor shall be applicable as per the
procedure laid down in AIS 137.
(b) The type approved vehicle used for the Portable Emissions Measurement System (PEMS) deterioration
test shall be representative for the vehicle category intended for the installation of the engine system.
The vehicle may be a prototype vehicle or an adapted production vehicle.
(c) For PEMS demonstration test at type approval, vehicle shall meet the requirements of in-service
compliance from the 1st April, 2023:
Provided that the maximum allowed conformity factors (CF) for in-service PEMS emission testing, shall be as
per the Table below, namely:-
Table
Maximum Allowed Conformity Factors (CF) for in-service Conformity Emission Testing
| Sl. No. | Parameter (1) | Maximum Allowed Conformity Factor (CF) (2) |
|---|---|---|
| (1) | CO | 1.5 |
| (2) | (1) THC | 1.5 |
| (3) | NMHC (2) | 1.5 |
| (4) | (2) CH4 | 1.5 |
| (5) | NOx | 1.5 |
Explanatory Notes to superscripts-
(1) For Compression Ignition Engines
(2) For Positive Ignition engines.
(13)
The vehicles specified under this sub-rule shall meet the following World Not-To-Exceed (NTE) Off
cycle laboratory testing limits for gaseous and particulate exhaust emissions, and as per procedure laid
down in AIS 137 and as amended time to time, namely:-
| Test cycle | CO Mg/kWh | THC Mg/kWh | NOx Mg/kWh | PM Mg/kWh |
|---|---|---|---|---|
| WNTE | 2000 | 220 | 60 | 16 |
(14)
The vehicles specified under this sub-rule manufactured on or after the 1st April, 2023 shall have the
capability of assessing the in-use performance of on-board diagnostic, as procedure laid down in AIS-
137 and as amended time to time.
(15)
The vehicles specified in this sub-rule fitted with engine, which rely on the use of a reagent in order to
reduce emissions, shall ensure the correct operation of NOx control measures, as procedure laid down
in AIS 137 and as amended from time to time. Specifications of NOx reducing agent AUS 32
(Aqueous Urea Solution) shall conform to Part 1 and Part 2 of ISO 22241-2006 or DIN V 70070 or
IS:17042:Part1 and Part 2: 2020 as amended from time to time.
(16)
The vehicles shall be equipped with an On-Board Diagnostic system (BS-VI OBD-I and BS-VIOBD-II)
for emission control which shall have the capability of identifying the likely area of the malfunctions by
means of fault codes stored in computer memory and communicating that information off-board, as per
procedure described in AIS 137, when that failure results in an increase in emission above the limits
given in the following Tables, namely:-
(a) BSVI-OBD-I threshold for- BS-VI vehicles manufactured on or after the 1st April, 2020 shall be
given below:-
| | Table 1 OBD Threshold Limits (BS-VI OBD-I) | | |
|---|---|---|---|
| | | Limit in mg/kWh | |
| | | NOx | PM Mass |
| | (1) | (2) | (3) |
| (1) | Compression ignition engines | 1500 | Performance Monitoring (1) |
| (2) | Positive Ignition engines | 1500 | ---- |
Explanatory Notes to superscripts-
(1) Performance monitoring for wall-flow diesel particulate filter shall be as per AIS-137 and as
amended time to time.
(b)
BS-VI-OBD-II threshold for BS-VI vehicles manufactured on or after the 1st April, 2023 shall be
as given below, namely:-
| | Table 2 OBD threshold Limits (BS VI OBD II) | | | |
|---|---|---|---|---|
| | | Limit in mg/kWh | | |
| | | NOx | PM Mass | CO |
| | (1) | (2) | (3) | (4) |
| (1) | Compression ignition engines | 1200 | 25 | --- |
| (2) | Positive Ignition engines | 1200 | --- | 7500 |
At the manufacturers request type approval may be granted for compliance to BS-VI OBD –II
requirements before it implementation:
Provided that nothing in this sub-rule shall apply to the motor vehicle used for Government purpose
relating to the defence of the country which is registered under section 60 of the Act and to the special
purpose vehicle (armoured and other specialised vehicle) used for operational purpose for the
maintenance of law and order and internal security.
(17) The CNG or Bio-CNG or HCNG Vehicles shall meet all the safety requirements as per AIS 024, AIS-
028 Revision 1 as applicable.
(18) The compatibility of vehicle to the level of Ethanol Fuel E85 or E100 or ED95 shall be defined by the
vehicle manufacturer and the same shall be displayed on vehicle by a clearly visible sticker as per AIS-
171:2021.
(19) All the Gasoline fueled Mono Fuel and Bi-Fuel vehicles with positive ignition engines including Hybrids,
manufactured on and after the 1st day of April, 2025, shall be certified with Ethanol (E20) fuel to
comply with the prevailing emission norms.
(20)
All those vehicle or engine manufacturers, who have obtained certifications as per the notification
published vide G.S.R. 156 (E), dated the 08 March, 2021, may not apply for compliance once again.”;
(2) in sub-rule (19),-
(a) in clause (i), for Table 2, the following Table shall be substituted, namely:-
“TABLE 2
Emission Standards for Bharat Stage- VI for two wheelers vehicles: APPLICABILITY OF TEST
REQUIREMENTS FOR TYPE-APPROVAL-BS-VI
| | Vehicle with Positive Ignition (PI) engines including hybrids | | | | | | | | | | Vehicles with Compression Ignition (CI) engines including hybrids | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | | (13) | (14) |
| Reference Fuel | Mono-fuel | | | | | | Bi-fuel(3) | | | Flex-fuel | Mono fuel | | Dual Fuel | Flex fuel |
| | Gasoline (E5)/ (E10)/ (E20) (5) | Ethanol (E100) | LPG | CNG/Bio- Methane/Bio- Gas/LNG | H2 | HCNG (Hydrogen+CNG) | Gasoline (E5)/ (E10)/ (E20) (5)(6) | Gasoline (E5)/ (E10)/ (E20) (5)(6) | Gasoline (E5)/ (E10)/ (E20) (5)(6) | Ethanol (E20) | Diesel (B7) (1) | Bio- Diesel (B100) | Diesel + CNG | Bio-Diesel (B7) |
| | | | | | | | LPG | CNG/Bio methane | H2 | (E85) | | | | (B100) (1) |
| Gaseous pollutant (Type I test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes |
| (2)Type I test Particulate Mass | Yes | Yes | No | No | No | No | Yes (Gasoline only) | Yes (Gasoline only) | Yes (Gasoline only) | Yes | Yes | Yes | Yes | Yes |
| Idle emission (Type II Test) | Yes | Yes | Yes | Yes | No | Yes | Yes (both fuels) | Yes (both fuels) | Yes (Gasoline only) | Yes (both fuels) | - | - | - | - |
| Crankcase emission (Type III test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Evaporative emission (Type IV test ) | Yes | Yes | No | No | No | No | Yes (gasoline only) | Yes (gasoline only) | Yes (gasoline only) | Yes E20 only | No | No | No | No |
| Durability (Type V test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (gasoline only) | Yes (gasoline only) | Yes (gasoline only) | Yes E20 only | Yes | Yes | Yes | Yes (B7 only) |
| (4)CO2 & Fuel consumption | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes (both fuels) |
| On board Diagnosis OBD | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Smoke Opacity | No | No | No | No | No | No | No | No | No | No | Yes | Yes | Yes | Yes (B7 only) |
| Engine Power | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes (both fuels) |
| Explanatory Notes to superscripts- | | | | | | | | | | | | | | |
| Table Classification of Vehicles and Weighing Factor | | | | |
|---|---|---|---|---|
| Sl.No. | Class | Definition of class | WMTC Cycles | Weighting factors for final emission results |
| (1) | (2) | (3) | (4) | (5) |
| 1. | Class 1 | Vehicles that fulfil the following specifications belong to class 1: 50cm3<engine capacity <150cm3 and Vmax ≤ 50 km/h or Engine capacity < 150 cm3 and 50 km/h <Vmax < 100km/h | Part 1 Reduced Speed cold followed by Part 1 Reduced Speed Hot | Part 1 Reduced Speed Cold Shall be 30% and Part 1 Reduced Speed Hot shall be 70% |
| 2. | Sub-Class 2-1 | Vehicles that fulfil the following specifications belong to class 2-1; Engine capacity < 150cm3 and 100 km/h ≤Vmax < 115 km/h or Engine capacity ≥ 150cm3 and Vmax < 115 km/h | Part 1 Reduced Speed cold followed by Part 2 Reduced Speed Hot | Part 1Reduced Speed Cold shall be 30% and Part 2 Reduced Speed Hot shall be 70% |
|---|---|---|---|---|
| 3. | Sub-Class 2-2 | Vehicles that fulfil the following specifications belong to class 2-2; 115 km/h ≤Vmax < 130 km/h | Part 1 cold followed by Part 2 Hot | Part 1 cold shall be 30% and Part 2 hot shall be 70% |
| 4. | Sub-Class 3-1 | Vehicles that fulfil the following specifications belong to class 3-1; 130 km/h ≤ Vmax < 140 km/h | Part 1 cold followed by Part 2 hot followed by Part 3 reduced speed Hot | Part 1 cold shall be 25% Part 2 Hot shall be 50 % And Part 3 reduced speed hot shall be 25% |
| 5. | Sub-Class 3-2 | Vehicles that fulfil the following specifications belong to class 3-2; Vmax > 140km/h | Part 1 cold followed by Part 2 Hot followed by Part 3 Hot | Part 1 cold shall be 25% Part 2 Hot shall be 50% And Part 3 Hot shall be 25%. |
(3) The test procedure and driving cycle for all test types including alternative durability and OBD shall be as per
AIS 137 and as amended time to time.
(4) Specification of Reference Fuels shall be as under, namely:-
(a)
the Reference Gasoline Fuel (E5) shall be as specified in Annexure IV-X;
(b)
the reference ethanol fuel (E85) shall be as per Annexure IV-Q;
(c)
the reference diesel fuel (B7) shall be as specified in Annexure IV-T;
(d)
in case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 as amended from time to time shall be used for the purpose of type approval and
conformity of production;
(e)
reference natural gas fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall be as
per Annexure-IV-L (G20, G23 and G25);
(f)
reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be as per Annexure-IV M (Fuel A
and Fuel B). However, in case of non-availability of reference fuels for CNG or LPG, the commercially
available CNG as per BIS 15958:2012 and LPG as per BIS 14861:2000 as amended from time to time
shall be used for the purpose of type approval and conformity of production;
(g)
hydrogen Fuel vehicles shall be tested with reference fuel specified in the Annexure-IV-W to said rules;
(h)
the reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013 and as amended time to time;
(i)
the reference E20 fuel (20 per cent. of Ethanol in Gasoline) shall as per IS 17943: 2022 and as amended
from time to time;
(j)
the reference for Hydrogen Compressed Natural Gas (HCNG) shall be as per IS 17314: 2019;
(k)
the reference B100 fuel shall be as per Annexure IV-S and as amended from time to time by BIS.
(5) Specifications of Commercial Fuels shall be as under, namely:-
(a)
the commercial Gasoline fuel blend shall be as per Annexure-IV-U;
(b)
specifications for commercial CNG and commercial LPG shall be in accordance with BIS 15958:2012
and as per BIS 14861:2000 respectively;
(c)
biodiesel used in commercial Diesel shall be as per IS 15607;
(d)
specifications for Commercial Diesel fuel shall be as per Annexure-IV-V;
(e)
the commercial E85 fuel (85 percentage Ethanol in Gasoline) specification shall be in accordance with
IS 16634:2017 as amended from time to time by BIS;
(f)
specifications for Biogas (Bio-Methane) shall be as per IS 16087:2013 and as amended time to time;
(g)
specification for commercial ethanol fuel (E20) shall be as per IS 17021: 2018;
(h)
specification for commercial Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314: 2019;
(i)
specification for commercial fuel E100 shall be as per IS 17821:2022 and as amended time to time.
(6)
Gasoline or CNG or LPG vehicles specified herein shall comply with the provisions of clause (i) of sub-
rule (2) of rule 115. The vehicle equipped with CI engine specified in sub-rule shall comply with the
provision of clause (ii) of sub-rule (2) of rule 115. For vehicles fitted with CI engine, the emission of
visible pollutants (smoke) shall not exceed the limit value of smoke density, as per Annexure I to sub-rule
(9) of rule 115. These smoke limits are without correction factor and engines are to be tested with
conditioned air supplied to the engine to maintain atmospheric factor of 0.98 to 1.02.
(7)
Crankcase ventilation system shall not permit the emission of any of the crankcase gases in to the
atmosphere.
(8)
Alternatively, to the fixed DF mentioned in Table 1 of this sub-rule, the vehicle manufacturers may opt for
evaluation of deterioration factor as per procedure described in AIS 137 and as amended time to time.
(9)
Conformity of production (COP) test procedure shall be as per clause ( e ) of sub-rule (12) of rule 115.For
2W vehicles, at least 50 per cent. of Vehicle models produced from particular plant shall be selected
randomly from dealer’s location or warehouse.
(10) The engine power shall be measured on engine dynamometer and measured power shall conform to the
power specified and tested as per procedure prescribed in AIS 137 and as amended time to time.
(11) The vehicle presented for type approval shall have been run for at least 1000 km before the test.
(12) The Two wheeler vehicles shall be equipped with On-Board Diagnostic (OBD) systems for emission
control which shall have the capability of identifying the likely area of malfunction by means of fault codes
stored in computer memory as per the procedure laid down in AIS 137 and the On-Board Diagnostic
(OBD) systems for emission control shall be as specified in the following Tables, namely:-
TABLE 1
OBD FUNCTIONS AND ASSOCIATE
A. Vehicles manufactured on or after the 1st April, 2020, shall be required to comply with the following OBD
Stage I (BS-VI)requirements or standards or compliances as per AIS 137, namely:-
| Sl. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component |
| 2. | Distance travelled since MIL (Malfunction indicator lamp) ON |
| 3. | Electrical disconnection of Electronic evaporative purge control device |
| 4. | EGR system monitoring |
TABLE 2
OBD FUNCTIONS AND ASSOCIATE
B.
Vehicles manufactured on or after the 1st April, 2023, shall be required to comply with
the following OBD Stage II-A (BS-VI) requirements or standards or compliances as per AIS 137, namely:-
| Sl. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component |
| 2. | Circuit Rationality |
| 3. | Distance travelled since MIL (Malfunction indicator lamp) ON |
| 4. | Electrical disconnection of Electronic evaporative purge control device |
| 5. | EGR system monitoring |
| 6. | Misfire Detection |
| 7. | Oxygen sensor deterioration monitoring |
| 8. | NOx after-treatment system monitoring |
| 9. | Particulate filter monitoring |
| 10. | Particulate Matter (PM) Emission monitoring |
| 11. | On-Board Diagnostics (OBD) Emission Threshold Limits |
| 12. | In-use performance monitoring – No minimum IUPR for all monitors M (Functionality of IUPR Determination) M |
TABLE 3
OBD FUNCTIONS AND ASSOCIATE
C. Vehicles manufactured on or after the 1st April, 2025, shall be required to comply with the following
OBD Stage II-B (BS-VI) requirements or standards or compliances as per AIS 137, namely:-
| Sr. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component |
| 2. | Circuit Rationality |
| 3. | Distance travelled since MIL (Malfunction indicator lamp) ON |
| 4. | Electrical disconnection of Electronic evaporative purge control device |
| 5. | Catalytic converter monitoring |
| 6. | EGR system monitoring |
| 7. | Misfire Detection |
| 8. | Oxygen sensor deterioration monitoring |
| 9. | NOx after-treatment system monitoring |
| 10. | Particulate filter monitoring |
| 11. | Particulate Matter (PM) Emission monitoring |
| 12. | On-Board Diagnostics (OBD) Emission Threshold Limits. |
| 13. | In-use performance monitoring – No minimum IUPR for all monitors M (Functionality of IUPR Determination) M |
| 14. | In-use performance monitoring – IUPR greater than or equal to 0.1 for all monitors M M |
(Revision 1), as applicable.
(15) The compatibility of vehicle to the level of Ethanol blend of E85/E100 shall be defined by the vehicle
manufacturer and the same shall be displayed on the vehicle by a clearly visible sticker as per AIS-
171:2021 as amended from time to time.
(16) For the Bi-fuel vehicles, the reference Gasoline fuel shall be as per E5 or E10 or E20 as declared by the
manufacturer during approval.
(17) All the Gasoline fueled Mono Fuel and Bi-Fuel Vehicles with Positive Ignition Engines including Hybrids,
manufactured on and after the 1st day of April, 2025, shall be certified with Ethanol (E20) fuel to comply
with the prevailing emission norms. The On-Board Diagnostic system for emission control shall be as per
the following tables:-
TABLE
ON-BOARD DIAGNOSTICS (OBD) EMISSION THRESHOLD LIMITS FOR BSVI OBD STAGE II-
A (FOR VEHICLES MANUFACTURED ON OR AFTER THE 1ST APRIL, 2023)
| Sl. No. | Vehicle | WMTC Class | CO (mg/km) | THC (mg/km) | NOx (mg/km) |
|---|---|---|---|---|---|
| | (1) | (2) | (3) | (4) | (5) |
| (1) | PI vehicles | 1, 2-1 & 2-2 | 2170 | 1400 | 350 |
| (2) | | 3-1 & 3-2 | 2170 | 630 | 450 |
| (3) | CI vehicles | All | 2170 | 630 | 900 |
TABLE
ON-BOARD DIAGNOSTICS (OBD) EMISSION THRESHOLD LIMITS FOR BSVI OBD STAGE II-
B (FOR VEHICLES MANUFACTURED ON OR AFTER THE 1ST APRIL 2025)
| Sl. No. | Vehicle | WMTC Class | CO (mg/km) | NMHC (mg/km) | NOx (mg/km) | PM (mg/k m) |
|---|---|---|---|---|---|---|
| | (1) | (2) | (3) | (4) | (5) | (6) |
| (1) | PI vehicles | All | 1900 | 250 | 300 | (1) 50 |
| (2) | CI vehicles | All | 1900 | 320 | 540 | 50 |
Explanatory Notes to superscript
(1) In case of P.I. engines, applicable only to vehicles with Direct Injection engines;
(18) All those vehicle or engine manufacturers, who have obtained certifications as per G.S.R. 156 (E) dated the
08 March, 2021, may not apply for compliance once again.
(b) for clause(ii), the following clause shall be substituted, namely:-
“(ii)The emission standard (Bharat Stage-VI) for two wheelers with spark ignition engines other than those
specified in sub-rule (19), (i) above : (Vehicles with cc ≤50 and Vmax ≤ 50km/hr) shall be as per below table,
namely:-
Table
| S. No. | Pollutant | TA=CoP norms mg/km | Deterioration Factor (DF) | Test Cycle (Cold Start at T =0 sec) |
|---|---|---|---|---|
| | (1) | (2) | (3) | (4) |
| (1) | CO | 500 | 1.2 | IDC as per AIS 137 |
| (2) | HC | 350 | 1.2 | |
| (3) | NOx | 150 | 1.2 | |
Notes.-
(1)
Gasoline or CNG or LPG vehicles specified herein shall comply with the provisions of clause (i) of
sub-rule (2) of rule 115.
(2)
The reference Gasoline fuels (E5) or (E10) (as specified by the manufacturer), shall be as specified in
Annexure IV-X or Annexure IV-XA, respectively.
(3)
Reference natural gas fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall be
as per Annexure IV-L (G20, G23 and G25).
(4)
Reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be as per Annexure IV M (Fuel
A and Fuel B), However, in case of non-availability of reference fuels for CNG or LPG, the
commercially available CNG as per BIS 15958:2012 and LPG as per BIS 14861:2000 as amended
from time to time shall be used for the purpose of type approval and conformity of production. The
reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013.
(5)
The provisions of (a), (c), (i), (e) and (f) for sub-rule (12) of rule 115, except the provisions therein,
shall be applicable to the said vehicle.
(6)
The driving cycle for vehicles with cc ≤ 50 and Vmax ≤ 50 km/hr shall be Indian Driving Cycle
(IDC) and the exhaust gas sampling shall start at the initiation of cycle in case of gasoline two
wheeler vehicles.
(7)
The engine power shall be measured on engine dynamometer and the measured power shall conform
to the power specified and tested as per procedure prescribed in AIS 137.
(8)
The commercial Gasoline fuel blend shall be as per Annexure IV-U.”;
(3) in sub-rule (20), for Table 2 the following Table shall be substituted, namely:-
“TABLE 2
Emission Standards Bharat Stage-VI for three wheelers vehicle model-manufactured on or after 1st April,
2020- APPLICABILITY OF TEST REQUIREMENTS FOR TYPE-APPROVAL-BSVI
| | Vehicle with Positive Ignition (PI) engines including hybrids | | | | | | | | | Vehicles with Compression Ignition (CI) engines including hybrids | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) |
| Reference Fuel | Mono-fuel | | | | | | Bi-fuel(3)(5) | | (5)Flex- fuel | Mono fuel | | Dual Fuel | Flex fuel |
| | Gasoline (E5)/ (E10)/ (E20) (5) | Ethanol (E100) | LPG | CNG/Bio- Methane/Bio- Gas/LNG | H2 | HCNG (Hydrogen+CNG) | Gasoline (E5)/ (E10)/ (E20) (6) | Gasoline (E5)/ (E10)/ (E20) (6) | Ethanol (E20) | Diesel (B7) (1) | Bio- Diesel (B100) | Diesel + CNG | Bio-Diesel (B7) |
| | | | | | | | LPG | CNG/Bio methane | (E85) | | | | (B100) (1) |
| Gaseous pollutant (Type I test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes (Both fuels) |
| (2)Type I test Particulate Mass | Yes | Yes | No | No | No | No | No | No | Yes | Yes | Yes | Yes | Yes (Both fuels) |
| Idle emission (Type II Test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | - | - | - | - |
| Crankcase emission (Type III test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Evaporative emission (Type IV test ) | Yes | Yes | No | No | No | No | Yes (gasoline only) | Yes (gasoline only) | Yes E20 only | No | No | No | No |
| Durability (Type V test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes (gasoline only) | Yes (gasoline only) | Yes E20 only | Yes | Yes | Yes | Yes (B7 only) |
| (4)CO2 and Fuel consumption | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes (both fuels) |
| OBD Stage II | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Smoke Opacity | No | No | No | No | No | No | No | No | No | Yes | Yes | Yes | Yes (B7 only) |
| Engine Power | Yes | Yes | Yes | Yes | Yes | Yes | Yes (both fuels) | Yes (both fuels) | Yes (both fuels) | Yes | Yes | Yes | Yes |
vehicles fuelled with Bio diesel blends above 7 per cent. will be tested with respective blends.
(3) In case of PI engines, applicable only to vehicles with direct Injection engines.
(4) Vehicles models and variants having option for Bi-fuel operation and fitted with limphome gasoline tank
of capacity not exceeding three litres on three wheelers shall be exempted from test in gasoline mode.
(5) CO2 emission and fuel consumption shall be measured as per procedure laid down in AIS 137.
(6) Manufacturers shall select one of the following fuels, i.e., reference Gasoline (E5) or reference Gasoline
(E10) or Reference E20 fuel for type approval and conformity of production test as per applicability.
(7) When bi-fuel vehicle is combined with a flex fuel vehicle, both test requirements are applicable.
Notes.-
1.
The test shall be on Chassis Dynamometer.
2.
The test including driving cycle shall be as provided in CMV sub-rule (12) with the modification that the
exhaust gas sampling should start at the initiation in case of gasoline and diesel three wheeler as per the
engine start up procedure referred to in Annexure-II.
3.
The provisions of clauses (a), (c), (d), (e) and (f) of sub-rule (12) of rule 115, except the provisions therein at
the end of this sub-rule, shall be applicable to the said vehicles.
4.
Specifications of reference fuels shall be as under, namely:-
(a) (i) the reference Gasoline fuels (E5) or (E10) ,as specified by the manufacturer, shall be as specified in
Annexure IV-X or Annexure-IV-XA, respectively.
(ii) the reference ethanol fuel (E85) shall be as per the Annexure-IV-Q; The reference Diesel fuel (B7)
shall be as specified in Annexure-IV-T.
(b) Reference natural gas fuel used in Natural Gas or Bio Methane mono-fuel vehicles shall be as per
Annexure-IV-L (G20, G23 and G25).
(c) Reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be as per Annexure IV M (Fuel A
and Fuel B), however, in case of non-availability of reference fuels for CNG or LPG the commercially
available CNG as per BIS 15958:2000 and LPG as per BIS 14861:2012 as amended from time to time
shall be used for the purpose of type approval and conformity of production.
(d) Reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013.
(e) The reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS 17314:2019.
(f) In case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 shall be used for the purpose of type approval and conformity of production.
(g) The reference E20 fuel (20 percent of Ethanol in Gasoline) shall be as per IS 17943: 2022.
(h) The reference B100 fuel shall be as per Annexure-IV-S.
(i) The reference fuel for hydrogen shall be as specified in Annexure-IV-W.
5.
Specifications of Commercial Fuels shall be as under, namely:-
(i) The commercial Gasoline fuel shall be as per Annexure-IV-U.
(ii) Specifications for commercial CNG and Commercial LPG shall be in accordance with BIS 15958:2012
and as per BIS 14861:2000 respectively.
(iii) Biodiesel used in commercial diesel shall be as per IS 15607.
(iv) Specifications for commercial diesel fuel shall be as per Annexure-IV-V.
(v) Specifications for commercial ethanol E85 (85 percentage Ethanol in Gasoline) shall be as per IS 16634:.
(vi) Specifications of commercial Biogas (Bio-methane) shall be as per IS 16087:2013.
(vii) Specifications of commercial Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314:2019.
(viii) Specification for commercial ethanol fuel (E20) shall be as per IS 17021: 2018.
(ix) Specification for commercial fuel E100 shall be as per IS 17821:2022.
6.
There shall be no relaxation of norms for Conformity of Production (CoP) purpose.
7.
The Conformity of Production (CoP) testing procedure shall be as described in AIS 137 and as amended time
to time, for 3W vehicles, at least 50 per cent of vehicles models produced from particular plant shall be
selected randomly from dealer’s location or warehouse.
8.
Alternative to fixed DF mention in Table 1, the vehicle manufacturers may opt for evaluation of deterioration
factor as per procedure described in AIS 137.
9.
The engine power shall be measured on engine dynamometer and the measured power shall conform to the
power specified and tested as per procedure prescribed in AIS 137.
10. The vehicle presented for type approval shall have been run for 1000 km before the test.
11. (a) Compression Ignition (CI) vehicles specified herein shall comply with the provisions of clause (ii) of
sub-rule (2) of rule 115.
(b) S.I. Vehicles specified herein shall comply with the provisions of clause (i) of sub-rule (2) of rule 115.
12. Crank case ventilation system shall not permit the emission of any of the crankcase gases into the
atmosphere. Test procedure shall as per AIS 137.
13. Evaporative emission for gasoline driven vehicles shall not be more than 1.5 g/test. Test procedure shall be as
per AIS 137.
14. The three wheeler vehicles shall be equipped with On-Board Diagnostics (OBD) systems for emission
control which shall have the capability of identifying the likely area of malfunction by means of fault codes
stored in computer memory as per the procedure laid down in AIS 137 and the On-Board Diagnostic (OBD)
systems for emission control shall be as specified in the Tables, namely:-
TABLE 1
OBD FUNCTIONS AND ASSOCIATE
Vehicles manufactured on or after the 1st April, 2020, shall be required to comply with the following OBD
Stage I (BS-VI) requirements or standards or compliances as per AIS 137:-
| Sl. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component. |
| 2. | Distance travelled since MIL (Malfunction indicator lamp) ON. |
| 3. | Electrical disconnection of Electronic evaporative purge control device. |
TABLE 2
OBD FUNCTIONS AND ASSOCIATE
Vehicles manufactured on or after the 1st April, 2023, shall be required to comply with the following OBD
Stage II-A (BS-VI) requirements or standards or compliances as per AIS 137:-
| Sl. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component. |
| 2. | Circuit Rationality. |
| 3. | Distance travelled since MIL (Malfunction indicator lamp) ON. |
| 4. | Electrical disconnection of Electronic evaporative purge control device. |
| 5. | EGR system monitoring. |
| 6. | Misfire Detection. |
| 7. | Oxygen sensor deterioration monitoring |
| 8. | NOx after treatment system monitoring. |
| 9. | Particulate filter monitoring. |
| 10. | Particulate Matter (PM) Emission monitoring. |
| 11. | On-Board Diagnostics (OBD) Emission Threshold Limits. |
TABLE 3
OBD FUNCTIONS AND ASSOCIATE
Vehicles manufactured on or after the 1st April, 2025, shall be required to comply with the following OBD
Stage II-B (BS-VI) requirements or standards or compliances as per AIS 137:-
| Sl. No. | Monitoring Items. |
|---|---|
| 1. | Circuit continuity for all emission related power train component. |
| 2. | Circuit Rationality. |
| 3. | Distance travelled since MIL (Malfunction indicator lamp) ON. |
| 4. | Electrical disconnection of Electronic evaporative purge control device. |
| 5. | EGR system monitoring. |
| 6. | Misfire Detection. |
| 7. | Oxygen sensor deterioration monitoring. |
| 8. | NOx after treatment system monitoring. |
| 9. | Particulate filter monitoring. |
| 10. | Particulate Matter (PM) Emission monitoring. |
| 11. | On-Board Diagnostics (OBD) Emission Threshold Limits. |
| 12. | Catalytic converter monitoring. |
TABLE 4
ON-BOARD DIAGNOSTICS (OBD) EMISSION THRESHOLD LIMITS FOR BS-VI OBD STAGE II-A
(FOR VEHICLES MANUFACTURED ON OR AFTER THE 1ST APRIL, 2023)
| S. No. | Vehicle | CO mg/km | NOx mg/km | PM mg/km |
|---|---|---|---|---|
| | (1) | (2) | (3) | (4) |
| (1) | PI vehicles | 955 | 758 | (1) 140 |
| (2) | CI vehicles | 955 | 960 | 140 |
(1) In case of PI engines, applicable only to vehicles with Direct Injection engines.
TABLE 5
ON-BOARD DIAGNOSTICS (OBD) EMISSION THRESHOLD LIMITS FOR BS-VI OBD STAGE II-B
(FOR VEHICLES MANUFACTURED ON OR AFTER THE 1ST APRIL, 2025)
| S. No. | Vehicle | CO mg/km | NOx mg/km | PM mg/km |
|---|---|---|---|---|
| | (1) | (2) | (3) | (4) |
| (1) | PI vehicles | 880 | 425 | (1) 140 |
| (2) | CI vehicles | 440 | 300 | 140 |
(1) In case of PI engines, applicable only to vehicles with Direct Injection engines.
(15) The CNG or Bio-CNG or HCNG Vehicles shall meet all the safety requirements as per AIS 024, AIS-028
Revision 1 as applicable.
(16) The compatibility of vehicle to the level of Ethanol blend of E85 or E100 shall be defined by the vehicle
manufacturer and the same shall be displayed on the vehicle by a clearly visible sticker as per AIS-171:2021.
(17) For the Bi-fuel vehicles, the reference gasoline fuel shall be as per E5 or E10 or E20 as declared by the
manufacturer during approval.
(18) All the Gasoline fuelled Mono Fuel and Bi-Fuel Vehicles with Positive Ignition Engines including Hybrids,
manufactured on and after the 1st day of April 2025, shall be certified with Ethanol (E20) fuel to comply
with the prevailing emission norms.
(19) All those vehicle or engine manufacturers, who have obtained certifications as per G.S.R. 156 (E) dated the
08 March, 2021, may not apply for compliance once again.”.
(4) in sub-rule (22),for Table 2, the following Table shall be substituted, namely:-
“TABLE 2
Emission Standard Bharat Stage-VI for Quadricycle (Category L 7) vehicles- APPLICABILITY OF TEST
REQUIREMENTS FOR TYPE-APPROVAL-BS-VI
| | | Vehicle with Positive Ignition (PI) engines including hybrids | | | | | | | | | Vehicles with Compression Ignition (CI) engines including hybrids | | | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) |
| Reference Fuel | Mono-fuel | | | | | | Bi-fuel(3)(5) | | | (5)Flex- fuel | Mono fuel | | Dual Fuel | Flex fuel |
| | Gasoline (E5)/ (E10)/ (E20) (6) | Ethanol (E100) | LPG | CNG/Bio- Methane/Bio- Gas/LNG | Hydrogen (ICE) | HCNG (Hydrogen+CNG) | Gasoline (E5)/ (E10)/ (E20) (6) | Gasoline (E5)/ (E10)/ (E20) (6) | Gasoline [(E5)/ (E10)/ (E20)] (5) | Ethanol (E20) | Diesel (B7) (1) | Bio- Diesel (B100) | Diesel | Bio- Diesel (B7) |
| | | | | | | | LPG | CNG/Bio methane | H2 | (E85) | | | CNG | (B100) (1) |
| Gaseous pollutant (Type I test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes(b) | Yes(b) | Yes (b) | Yes(b) | Yes | Yes | Yes | Yes(b) |
| (2)Particulate Mass (Type I test) | Yes | Yes | No | No | No | No | Yes(a) | Yes(a) | Yes (a) | Yes(b) | Yes | Yes | Yes | Yes(b) |
| Idle emission (Type II Test) | Yes | Yes | Yes | Yes | No | Yes | Yes(b) | Yes(b) | Yes (a) | Yes(b) | - | - | - | - |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Crankcase emission (Type III test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes( | Yes | Yes E20 only | Yes | Yes | Yes | Yes |
| Evaporative emission (Type IV test ) | Yes | Yes | No | No | No | No | Yes(a) | Yes(a) | Yes (a) | Yes E20 only | No | No | No | No |
| Durability (Type V test) | Yes | Yes | Yes | Yes | Yes | Yes | Yes(a) | Yes(a) | Yes (a) | Yes E20 only | Yes | Yes | Yes | Yes(c) |
| (4)CO2 & Fuel consumption | Yes | Yes | Yes | Yes | Yes | Yes | Yes(b) | Yes(b) | Yes (b) | Yes(b) | Yes | Yes | Yes | Yes(b) |
| On Board Diagnostic (OBD) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Smoke Opacity | No | No | No | No | No | No | No | No | No | No | Yes | Yes | Yes | Yes (B7 only) |
| Engine Power | Yes | Yes | Yes | Yes | Yes | Yes | Yes(b) | Yes(b) | Yes (b) | Yes(b) | Yes | Yes | Yes | Yes(b) |
Explanatory Notes to superscript-
(1)
Vehicles fuelled with bio diesel blends up to 7 per cent. shall be tested with reference diesel (B7) and
vehicles fuelled with Bio diesel blends above 7 per cent (percent) will be tested with respective blends.
(2)
In case of Positive Ignition (PI) engines, applicable only to vehicles with Direct injection engines.
(3)
Vehicles models and variants having option for Bi-fuel operation and fitted with limp-home gasoline
tank of capacity not exceeding three litres on quadricycle shall be exempted from test in Gasoline mode.
(4)
CO2 emission and fuel consumption shall be measured as per procedure laid down in AIS 137 as
amended from time to time.
(5)
When bi-fuel vehicle is combined with a flex fuel vehicle, both test requirements are applicable.
(6)
Manufacturers shall select one of the following fuels, namely:- Reference Gasoline (E5) or Reference
Gasoline (E10) or Reference E20 fuel for Type Approval and Conformity of Production test as per
applicability.
Explanatory Notes to superscript-
“Conditions.-
(a) Gasoline Only
(b) Both Fuels
(c)B7 fuel only”
Notes.-
1. The test shall be on Chassis Dynamometer.
2. The test procedure shall be as per AIS137 as amended from time to time. WMTC Test cycle Part1-cold
followed by Part1-Hot to be driven.
(a) Reference mass : kerb weight + 150 kg.
(b) Weightage factors: WMTC Part1 Cold: 30%; WMTC Part1 Hot: 70 per cent.
(c) Breakdown of WMTC Part 1 cycle: Refer AIS137.
(d) Sampling start at T=0 sec (cold start).
3. A deterioration factor shall be applicable as per Table 1(A) and Table 1(B) above for durability.
Alternatively, the vehicle manufacturer may opt for a vehicle ageing test of 80,000 kms for evaluating the
Deterioration factor as per AIS: 137 and as amended from time to time.
4. For Type II test:
(i) Gasoline or CNG or LPG vehicles specified herein shall comply with the provisions of clause (i) of sub-
rule (2) of rule 115.
(ii) Diesel vehicles specified herein shall comply with clause (ii) of sub-rule (2) of rule 115.
5. (i) Conformity of Production (COP) (i) The frequency and sampling shall be as per the following table with
annual production exceeding 250 per 6 months:-
TABLE 3
| Sl. No. | Type of vehicle | Annual Production | | COP Frequency |
|---|---|---|---|---|
| | | Exceeding | Upto | |
| | (1) | (2) | (3) | (4) |
| (a) | Quadricycle | 250 per 6 months | 10000 per year | Once every year |
| (b) | Quadricycle | 10000 per year | 75000 per 6 months | Once every 6 months |
| (c) | Quadricycle | 75000 per 6 months | --- | Once every 3 months |
(ii) In case, Where the production volume in six months is less than 250 per model including its variants,
the provisions contained in the sub-rule(5) to rule 126A shall apply.
(iii) There shall be no relaxation of norms for Conformity of Production (COP) purposes.
(iv) The Conformity of Production (COP) testing procedure shall be as described in AIS 137 as amended
time to time.
6. (i) For vehicles operating on compressed natural gas mode, the provisions of rule 115(B) shall be applicable;
(ii) For vehicles operating on liquefied petroleum gas mode, the provisions of rule 115(C) shall be applicable.
7. Specification of Reference Fuels shall be as below, namely:-
(a) The reference Gasoline fuels (E5) or (E10) ,as specified by the manufacturer, shall be as specified in
Annexure IV-X or Annexure-IV-XA, respectively.
(b) The reference Ethanol fuel (E85) shall be as per the Annexure-IV–Q.
(c) The Reference Diesel fuel (B7) shall be as specified in Annexure-IV–T.
(d) Reference natural gas fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall be as
per Annexure-IV-L (G20, G23 and G25).
(e) Reference LPG fuel used in LPG mono-fuel or bi-fuel vehicles shall be as per Annexure IV M (Fuel A
and Fuel B), however, in case of non-availability of reference fuels for CNG / LPG, the commercially
available CNG as per IS 15958:2012 and LPG as per IS 14861:2000 as amended from time to time shall
be used for the purpose of type approval and conformity of production.
(f) Hydrogen Fuel vehicles shall be tested with reference fuel specified in the Annexure IV-W.
(g) The reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013 and as amended from time to
time.
(h) In case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 as amended from time to time shall be used for the purpose of Type approval and
Conformity of Production.
(i) The reference E20 fuel (20 percent of Ethanol in Gasoline) shall as per IS 17943: 2022.
(j) The reference for Hydrogen Compressed Natural Gas (HCNG) shall be as per IS 17314: 2019.
(k) The reference B100 fuel shall be as per Annexure-IV-S.
8. Specifications of Commercial Fuels shall be as under, namely:-
(a) The Commercial Gasoline fuel shall be as per Annexure-IV-U.
(b) Specification for commercial CNG and commercial LPG shall be in accordance with IS 15958:2012 and
as per IS 14861:2000 respectively.
(c) Bio-diesel used in commercial Diesel shall be as per IS 15607.
(d) Specification for commercial diesel fuel shall be as per Annexure-IV-V.
(e) Specification for commercial fuel E85 (85 percentage Ethanol in Gasoline) shall be as per IS 16634:2017.
(f) Specification of commercial Biogas (Bio-methane) shall be as per IS 16087:2013.
(g) Specification for commercial ethanol fuel (E20) shall be as per IS 17021: 2018.
(h) Specification for commercial Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS
17314: 2019.
(i)Specification for commercial fuel E100 shall be as per IS 17821:2022.
9. Crank case ventilation shall not permit the emission of any of the crank case gases into the atmosphere. The
test procedure shall be as per AIS 137.
10. The engine power shall be measured on engine dynamometer and the measured power shall conform to the
power specified, when tested as per procedure prescribed in AIS 137.
11. CO2 emission and fuel consumption shall be measured as per procedure laid down in AIS 137.
12. The vehicle presented for type approval shall have been run for at least 1000 km before the test.
13. The vehicles shall be equipped with On Board Diagnostic (OBD) systems for emission control which shall
have the capability of identifying the likely area of malfunction by means of fault codes stored in computer
memory as per the procedure laid down in AIS 137.
Table 4: OBD I monitoring items for BS-VI
vehicles manufactured on or after the1st
| Sl. No. | Monitoring Items | All Positive ignition vehicles | All Compression ignition vehicles |
|---|---|---|---|
| | (1) | (2) | (3) |
| (a) | Oxygen (O2) sensor | √ | -- |
| (b) | Secondary Air System, if provided | √ | -- |
| (c) | Electronic fuel injection system | -- | √ |
| (d) | Coolant temperature | √ | √ |
| (e) | EGR,(Exhaust Gas Recirculation), if provided | √ | √ |
| (f) | Emission Control systems / components (Comprehensive Components) | √ | √ |
| (g) | Circuit continuity for all emission related | √ | √ |
| | power train components | | |
|---|---|---|---|
| (h) | Distance travelled since MIL (Malfunction Indicator Lamp) ON | √ | √ |
Table-5: OBD Stage II-A Thresholds for BS-
VI vehicles manufactured on or after the 1st
| Sl. No. | Engine Type | CO (mg/km) | THC (mg/km) | NO X (mg/km) |
|---|---|---|---|---|
| | (1) | (2) | (3) | (4) |
| (a) | Positive Ignition (PI) | 2170 | 1400 | 350 |
| (b) | Compression Ignition (CI) | 2170 | 630 | 900 |
Table 5A: OBD Stage II-B Thresholds for
BS-VI vehicles manufactured on or after the
1st April, 2025
| Sl. No. | Engine | CO (mg/km) | NMHC (mg/km) | NO X (mg/km) | PM (mg/km) |
|---|---|---|---|---|---|
| | (1) | (2) | (3) | (4) | (5) |
| (a) | Positive Ignition (PI) | 1900 | 250 | 300 | (1) 50 |
| (b) | Compressi on Ignition (CI) | 1900 | 320 | 540 | 50 |
| Explanatory Notes to superscript- (1) Positive ignition (PI) engine, applicable only to vehicles with gasoline direct injection engines. | | | | | |
Table 6: OBD II Monitoring Items
| Sl. No | Monitoring Items (if equipped/where fitted) | OBD Stage II-A 1st April, 2023 | OBD Stage II- B 1st April, 2025 |
|---|---|---|---|
| | (1) | (2) | (3) |
| (a) | All emission related power train components: electric circuit Malfunctions (Circuit continuity + Circuit rationality) | √ | √ |
| (b) | Distance travelled since MIL (Malfunction indicator lamp) ON | √ | √ |
| (c) | Electrical disconnection of | √ | √ |
| | Electronic evaporative purge control device | | |
|---|---|---|---|
| (d) | Catalytic converter monitoring | x | √ |
| (e) | EGR system monitoring | √ | √ |
| (f) | Misfire detection for PI vehicle | √ | √ |
| (g) | Oxygen sensor deterioration | √ | √ |
| (h) | Particulate filter | √ | √ |
| (i) | Particulate matter (PM) monitoring. | √ | √ |
15. The compatibility of vehicle to the level of Ethanol blend of E85/E100 shall be defined by the vehicle
manufacturer and the same shall be displayed on the vehicle by a clearly visible sticker as per AIS-171:2021.
16. For the Bi-fuel vehicles, the reference gasoline fuel shall be as per E5 or E10 or E20 as declared by the
manufacturer during Approval.
17. All the Gasoline fuelled Mono Fuel and Bi-Fuel Vehicles with Positive Ignition Engines including Hybrids,
manufactured on and after the 1st day of April, 2025, shall be certified with Ethanol (E20) fuel to comply with
the prevailing emission norms.
18.
All those vehicle or engine manufacturers, who have obtained certifications as per G.S.R. 156 (E) dated 08
March 2021, may not apply for compliance once again.”.
[F. No. RT-11036/133/2020-MVL]
MAHMOOD AHMED, Addl. Secy.
Note.- The principal rules were published in the Gazette of India, Extraordinary, Part II, Section 3, Sub-section (i)
vide notification number G.S.R. 590(E), dated the 2nd June, 1989 and last amended vide notification number
G.S.R. 886(E) dated the 8th December, 2023.
and Published by the Controller of Publications, Delhi-110054. MANOJ KUMAR
MANOJ KUMAR VERMA
Date: 2024.01.06 16:18:34
+05'30'
VERMA
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