What does vehicle emission standard mean?

1 Answers
VanOwen
07/29/25 9:07pm
Vehicle emission standards refer to regulations that limit the amount of harmful gases emitted from vehicle exhaust, including carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot. The emission standards include: National I Emission Standard, National II Emission Standard, National III Emission Standard, National IV Emission Standard, National V Emission Standard, and National VI Emission Standard. Methods to check a vehicle's emission standard are: 1. Check the vehicle conformity certificate, which is provided with the vehicle upon delivery and clearly states the emission standard; 2. Refer to the vehicle's packing list, where the emission standard can be found in the vehicle information section; 3. Examine the conformity certificate, which includes exhaust emissions and indicates the corresponding emission standard; 4. Visit the official vehicle environmental protection website, locate the public query platform at the bottom of the homepage, enter the vehicle's VIN code and the last 6 digits of the engine number to check; 5. Inspect the vehicle's environmental protection label, which is affixed to the inside of the front windshield and clearly states the emission standard on the back.
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