When did China 4 start?

[ConnorAnn]

The China 4 emission standard started in 2011 and was in effect until the China 5 standard was implemented in 2018. Therefore, vehicles produced between 2011 and 2017 were all under the China 4 standard. The China 4 standard requires the emission levels of various pollutants to be approximately 50% lower than those of the China 3 standard. The specific implementation times of the China 4 standard for different vehicle types are as follows: 1. The China 4 standard for diesel vehicles over 3.5 tons, originally scheduled to be implemented on January 1, 2010, was postponed by two years. This means that from January 1, 2012, diesel vehicles that did not meet the China 4 standard requirements could not be sold or registered; new compression-ignition engines that did not meet the China 4 standard requirements could not be sold or put into use. 2. For diesel vehicles under 3.5 tons, the implementation of the China 4 standard was postponed by three years, taking effect on July 1, 2013. 3. From January 1, 2011, gas-fueled spark-ignition engines and vehicles that did not meet the China 4 standard requirements could not be sold or registered.