Can a China 5 vehicle be upgraded to China 6?

[McColton]

A China 5 vehicle can be upgraded to China 6. Upgrading components such as the three-way catalytic converter and the engine ECU logic can indeed improve the vehicle's emission standards. However, this is not recommended as it involves the original factory calibration of the engine. Modifications that have not undergone rigorous testing may lead to other issues. Below are the specific differences between China 5 and China 6: Standard Limit Differences: The China 6 standard limits are approximately 40% to 50% stricter than those of China 5. China 6 adopts a fuel-neutral principle, meaning that regardless of the fuel type, the emission limits are the same. In contrast, during the China 5 stage, diesel and gasoline vehicles had different emission standards. Emission Standard Differences: Compared to China 5, the China 6 standard reduces nitrogen oxides by 77%, particulate matter by 67%, introduces a limit requirement for particle number (PN), and tightens the durability requirements for emission control devices and the related requirements for on-board diagnostic systems (OBD).