How to Check the National Emission Standard of a Sedan?

[Reagan]

One obvious method to check the national emission standard of a car is to look for the label on the front windshield. Behind the environmental compliance label, you can usually find this information. Another method is to refer to the purchase documents. Look for the page on vehicle conformity or the first page of the vehicle certification number. This section typically includes an overview of the emission standards, but it may not directly state the national standard (e.g., National 4, National 5). Instead, it might display a string of characters. You can then search for the meaning of this character string in a browser. For example, based on the standard string shown in the image, it corresponds to National 5 standards.