What are the emission standards for annual vehicle inspections?
3 Answers
Annual inspection emission standards are as follows: Carbon monoxide 700mg/km, Non-methane hydrocarbons 68mg/km, Nitrogen oxides 60mg/km, PM particulate matter 4.5mg/km, etc. Below is relevant information about vehicle annual inspections: Elimination of environmental protection labels: China's transportation authorities have issued new regulations: vehicles that pass the annual inspection no longer need to display the environmental protection label. Elimination of compulsory insurance labels: Currently being piloted in Beijing, vehicles registered in Beijing can replace the compulsory insurance label with electronic insurance policies. Exemption period: Non-commercial passenger vehicles are exempt from inspection for the first 6 years, but owners must submit proof of compulsory insurance and vehicle and vessel tax payment to the vehicle management office every 2 years, then directly apply for the inspection compliance mark from the traffic management department.
As a frequent driver, I'm quite familiar with the emission standards for annual vehicle inspections. Essentially, they check whether your vehicle's exhaust emissions comply with the pollutant limit values. Different model years have different standards – newer vehicles follow stricter China V or China VI standards, while older vehicles are subject to more lenient China III or China IV standards based on their manufacturing date. The tests measure common gases like carbon monoxide, hydrocarbons, and nitrogen oxides to check if their concentrations exceed limits. I think this is quite important. With proper regular maintenance – such as frequent oil changes and keeping the air filter clean – the engine burns fuel more completely, resulting in lower emissions and an easier pass at inspection. This not only benefits the driver but also protects the environment by reducing smog. If an older vehicle has high emissions, repairing the catalytic converter usually helps. Overall, these standards aim to prevent vehicles from emitting excessive smoke on the roads.
People who work on car repairs and inspections every day can tell you that emission standards are the threshold for pollution control during annual inspections. The core is testing three items: CO, HC, and NOx levels, judged against national standards like China V or China VI to determine pass or fail. New cars have stricter requirements with lower limits, while older cars get more leniency. During testing, the vehicle is put on a lift, the engine is started, and sensor readings are taken—exceeding the limits even slightly means repairs are needed. Common issues include air system leaks and unstable fuel injection. I recommend owners use high-quality gasoline and regularly check the exhaust pipe and oxygen sensor. Keeping up with these small steps ensures emissions stay within standards, making annual inspections hassle-free.
