Can National 5 Standard Vehicles Still Be Driven After the Implementation of National 6?

[Boromir]

After the implementation of National 6, it will not affect the normal driving of National 5 vehicles, only the sale and registration of National 5 vehicles will be prohibited. China has not set a retirement period for private passenger vehicles. How long National 5 vehicles can continue to be used depends on whether they meet the standards at the time of purchase. If they meet the standards, they can be driven indefinitely. Compared with National 5, the National 6 standard reduces nitrogen oxides by 77% and particulate matter by 67%. It also tightens the requirements for the durability of emission control devices and the on-board diagnostic system. National 5 vehicles can upgrade their emission standards to National 6 by upgrading components such as the three-way catalytic converter and the engine ECU logic. However, this is not recommended because it involves the original factory calibration of the engine. Modifications without rigorous testing can hardly guarantee that the vehicle will not develop other issues.