Chinese emission standards for new passenger cars and light-duty commercial vehicles up to China 5 are based on European regulations. In 2015, Beijing proposed standards based on US Tier 3 regulations. Light-duty vehicle categories are based on the EU classification with some changes:
- Type 1 vehicles: M1 vehicles for no more than 6 passengers including driver, and GVW ≤ 2.5 ton,
- Type 2 vehicles: Other light-duty vehicles (including N1 light commercial vehicles) further divided into three classes based on the reference mass (RM):
- Class I: RM ≤ 1305 kg
- Class II: 1305 kg < RM ≤ 1760 kg
- Class III: RM > 1760 kg
Emission limits are shown in Table 1 for gasoline vehicles and in Table 3 for diesel vehicles. Table 2 shows post China 5 emission limits proposed for Beijing in 2015 . They are based on US Tier 3 Bin 70 limits. If past practice in China continues, these limits will be adopted by other cities and nationally as well.
|China 3||Type 1||2.30||0.20||-||0.15||-|
|China 4||Type 1||1.00||0.10||-||0.08||-|
|China 5||Type 1||1.00||0.100||0.068||0.060||0.0045a|
|a - applies only to direct injection positive ignition engines|
|China 6||M1, M2, M3||FTP75||1000||43.5||1.86|
|M1, M2, M3, N1||SC03||2000||43.5||-|
|M1, M2, M3, N1||HWFET||-||43.5||-|
|China 3||Type 1||0.64||0.56||0.50||0.050|
|China 4||Type 1||0.50||0.30||0.25||0.025|
|China 5||Type 1||0.50||0.230||0.180||0.0045||6×1011|
The implementation schedule is listed in Table 4. The nationwide dates generally refer to new type approvals—first registration of existing vehicle models is typically allowed for one more year. The nationwide China 5 regulation  provides one implementation date, applicable to both new type approvals and to first registration.
|China 1||2000.01 (2000.07†)||Nationwide||Euro 1|
|China 2||2002.08||Beijing||Euro 2|
|PI: 2004.07a (2005.07†)|
|China 3||2005.12||Beijing||European OBD from 2006.12||Euro 3|
|2006.10||Guangzhou||With European OBD|
|2007.01||Shanghai||With European OBD|
|2007.07||Nationwide||EOBD: Type 1 2008.07; Type 2 2010.07|
|China 4||2008.03||Beijing||Euro 4|
|China 5||2013.02||Beijing||Euro 5|
|China 6||PI: 2017.12||Beijing||US Tier 3|
PI - positive ignition (gasoline, natural gas); CI - compression ignition (diesel)
† production conformity
a first registration
New gasoline vehicles up to and including China 5 must also meet an evaporative emission limit of 2 g/test (SHED). The Beijing 6 proposal would see this reduced to 0.65 g for M1, M2 and M3 vehicles, 0.85 for N1 vehicles with a maximum mass ≤ 2720 kg and 1.15 g for N1 vehicles with a maximum mass > 2720 kg .
Durability requirements are 80,000 km for Euro 3, and 100,000 km for Euro 4. Post China 5 durability requirements are 200,000 km .