What are the differences between National 5 and National 6 emission standards?
1 Answers
The differences between National 5 and National 6 emission standards lie in their control levels, release dates, issuing authorities, and restrictions. Here are the specific details about the differences between National 5 and National 6 emission standards: 1. Different control levels: The main difference between National 5 and National 6 is the emission standard for carbon monoxide in vehicle exhaust. National 6 is divided into National 6A and National 6B phases. The carbon monoxide emission rate in National 6A is about 30% lower than that of National 5, while in National 6B, the carbon monoxide emission is reduced by 50% compared to National 5. Compared to National 5, the National 6 standard imposes stricter requirements on carbon monoxide, nitrogen oxides, and hydrocarbons in emissions. 2. Different release dates: The National 5 standard was implemented nationwide on January 1, 2017. Starting from April 1, 2016, all imported, sold, and registered light-duty gasoline vehicles, light-duty diesel passenger vehicles, and heavy-duty diesel vehicles (only for public transport, sanitation, and postal purposes) in the Beijing-Tianjin-Hebei region had to comply with the National 5 emission standard. On December 23, 2016, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine issued the "Limits and Measurement Methods for Emissions from Light-Duty Vehicles (China 6)", which came into effect on July 1, 2020. On June 22, 2018, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine issued the "Limits and Measurement Methods for Emissions from Heavy-Duty Diesel Vehicles (China 6)", which came into effect on July 1, 2019. 3. Different issuing authorities: The National 5 standard was issued by the Ministry of Environmental Protection. The National 6 standard for motor vehicle pollutant emissions was issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine. 4. Different restrictions: After July 1, 2019, National 5 vehicles could no longer be registered in most parts of the country, and many regions have already implemented or will implement the National 6 standard ahead of schedule. If the National 6 standard has been implemented in your area, National 5 vehicles cannot be registered. If you want to purchase a National 5 vehicle, it is recommended to verify with the local vehicle management department before making a decision.
