What does the engine type approval number mean?

3 Answers
MacCamila
07/29/25 11:13am
Engine type approval number is the code on the vehicle type approval certificate. Below are specific details about the engine type approval number: Meaning: The first two letters 'CN' represent China; followed by two letters - 'ZC' represents heavy-duty vehicles equipped with compression ignition engines; if it's 'QQ', it represents light-duty gasoline vehicles; 'QC' represents light-duty diesel vehicles; 'CJ' represents compression ignition engines; 'QL' represents light-duty dual-fuel vehicles. Additional information: The type approval certificate is used for motor vehicle type approval. Automobile manufacturers must apply for and obtain national approval for pollutant emission control performance type approval when producing and selling vehicles. The type approval application for a vehicle model should be submitted by the automobile manufacturer, covering aspects such as exhaust pollutants, crankcase pollutants, evaporative pollutants, durability of pollution control devices, and OBD systems for that vehicle model.
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RachelDella
08/13/25 6:00pm
I remember the engine type approval number is quite important. Simply put, it's like an environmental ID card issued by the Chinese government for engines, certifying that the engine meets emission standards. You need to pay attention to this when buying a car, otherwise you won't be able to get license plates. Last year when I changed cars, I encountered this issue—the 4S store didn't remind me, and it got stuck during the license plate application, causing several days of hassle. This number is usually printed on the engine nameplate or in the vehicle conformity certificate, a combination of letters and numbers indicating it has passed emission standard tests like China VI. Driving daily without this approval number is not only illegal and may result in fines, but more seriously, it's bad for the environment, causing excessive emissions and air pollution. Nowadays, annual inspections in cities are becoming stricter, and having this number ensures a smooth pass. In short, it's the basic certification ensuring your car doesn't pollute the environment.
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KyleDella
10/08/25 3:02am
As a car enthusiast, I find engine type approval numbers incredibly cool! They serve as the official certification code for engines, used by China's environmental authorities to verify emission compliance, with each number being unique. I've studied its structure - for instance, the first few digits indicate the engine type, while the latter digits represent the test version number. This number is particularly crucial when modifying vehicles; replacement parts must match the original approval number, or the vehicle risks being impounded. Regular car owners can use it to quickly assess a used car's environmental performance. Moreover, this number appears on both vehicle registration certificates and accompanying documentation, and understanding it can help you look up engine specifications online. This thing isn't just a code - it's a small imprint of automotive technological progress.
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