Can China 5 be upgraded to China 6?

[OMaddox]

Yes, upgrading components such as the three-way catalytic converter and engine ECU logic can indeed improve the vehicle's emission standards. Here is relevant information: 1. Reason: The emission standard of each vehicle is already recorded in the factory-issued vehicle qualification certificate, so even if it meets the China 6 standard through various methods, it does not mean it is a "China 6 vehicle." Additionally, since European emission standards are ahead of China's, many global models already meet the yet-to-be-announced China 6 standard. However, due to China's fuel quality not yet meeting the China 6 standard and only the China 5 standard being certifiable previously, these vehicles can only be classified as China 5 models. 2. China 6: The full name of the "China 6" emission standard is the "National Sixth Stage Emission Standard for Light-Duty Vehicles." It is an upgraded standard based on China's domestic conditions, building upon the "Limits and Measurement Methods for Emissions from Light-Duty Vehicles (China 5)."