How to Distinguish Between National III, IV, and V Vehicles?

[VonWyatt]

Methods to distinguish between National III, IV, and V vehicles: 1. Vehicle Registration Certificate: The vehicle registration certificate, commonly known as the 'big green book,' has the relevant information clearly marked. 2. Environmental Protection Green Label: Three stars indicate National III, four stars indicate National IV, and five stars indicate National V. 3. Year Estimation: Since National III, IV, and V standards were implemented in specific years, you can estimate based on the vehicle's model year. Emission Standards: The European Union began implementing emission standards in the early 1990s. China's National I standard was implemented in 2001, so China's emission standards have always been based on EU standards, albeit with different names. The current National VI standard, officially named the 'National Sixth Stage Emission Standard for Motor Vehicles,' refers to vehicles produced under this stage as National VI vehicles.