What does China 5 refer to in automobiles?

[DeRobert]

China 5 refers to the National Fifth Stage Emission Standard for motor vehicle pollutants, which is equivalent to the Euro 5 emission standard currently implemented in Europe. Compared to the China 4 standard, the China 5 standard reduces nitrogen oxide emissions by 25% for light-duty vehicles and 43% for heavy-duty vehicles. After the implementation of the China 5 emission standard, vehicle pollutant emissions will be significantly reduced, and vehicles meeting the China 2 emission standard will be mandatorily scrapped. For environmental protection, China has now promulgated the China 6 emission standard, which is divided into two phases: China 6a and China 6b. Compared to the China 5 standard, the China 6 standard imposes stricter controls on vehicle exhaust emissions.

[MilesDella]

China's National 5 (abbreviated as China V) refers to the fifth-stage emission standard established by our country, primarily regulating pollution control for newly manufactured vehicles. According to researched data, this standard was implemented nationwide in 2017, requiring vehicles to be equipped with more advanced three-way catalytic converters. The emissions of pollutants such as carbon monoxide and hydrocarbons must be reduced by over 40% compared to the National 4 standard. Data from the Ministry of Environmental Protection indicates that China 5 can reduce annual pollutant emissions by more than one ton per vehicle. The increased blue skies in cities like Beijing and Shanghai in recent years can partly be attributed to this standard. If you purchased a car in the past few years, checking the accompanying green environmental label marked with 'China V' confirms compliance with this standard.

[DiAlina]

The 'China V vehicles' we car owners usually refer to are those that meet this emission standard. The most noticeable change is that gasoline vehicles must now use China V gasoline, and the 92 and 95 octane fuel at gas stations follows this standard. Driving such vehicles makes passing the annual exhaust emission test much easier, and the dashboard warning lights are less likely to come on. However, it's important to note that the minimum emission standard for new vehicle registration now is China VI, and the prices of China V vehicles in the used car market have dropped, especially in regions with restricted vehicle transfers like Beijing-Tianjin-Hebei. It's essential to check the policies in advance for cross-province transfers.

[TimothyAnn]

The China 5 standard is actually a technical specification issued by the Ministry of Environmental Protection in 2013. The key point is to reduce the nitrogen oxide emission limit to 0.08g/km (0.17g/km for diesel vehicles), which is equivalent to 60% of the China 4 standard. During this phase, more sensitive OBD systems were mandated, and any vehicle component affecting exhaust emissions would trigger a dashboard warning. I've seen many cases where the oxygen sensor got dirty and triggered the warning light. The dual-idle speed testing method currently used in inspection stations is specifically designed to match this standard.

[Allen]

The China V emission standard logo can be found on the new vehicle's delivery checklist or certificate of conformity. The key difference during the upgrade from China IV to China V was that all new vehicles had their exhaust pipes redesigned. For example, gasoline vehicles were required to use ceramic substrate three-way catalytic converters, while diesel vehicles needed to install DPF particulate filters. Experienced mechanics say that if such vehicles experience a lack of power when accelerating, nine times out of ten it's due to a clogged exhaust after-treatment system. Replacing an OEM three-way catalytic converter costs at least three to four thousand yuan. Nowadays, it's more cost-effective to purchase aftermarket parts with a three-year warranty at repair shops.