How to Distinguish Between National 5 and National 6?

1 Answers
OCollin
07/30/25 12:12am
National 5 emission standard is marked with "V", while National 6 emission standard is marked with "Ⅵ", both using Roman numerals. Below is the relevant information about how to check vehicle emission standards: 1. Methods to check vehicle emission standards: The vehicle's nameplate will indicate the complete vehicle model. Visit the Motor Vehicle Environmental Protection Website, enter the fuzzy condition (complete vehicle model) in the input box on the webpage, then input the correct verification code, and click query to find the vehicle's related information, including the emission standard. 2. How to locate the vehicle nameplate: Generally, there is a nameplate below the co-pilot's door. Relevant stickers indicating the complete vehicle model can also be found in places such as the lower left corner of the front windshield, on the driver's door pillar, on the left side of the dashboard, in the engine compartment, on the side door's adhesive label, on the door frame base, or inside the glove box.
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