How to Distinguish Between China 5 and China 6 Vehicle Models?

[ChristopherDella]

Methods to distinguish between China 5 and China 6 vehicles are: 1. Check the vehicle conformity certificate; 2. Check the environmental information accompanying vehicle list; 3. Check the vehicle qualification certificate. The differences between China 5 and China 6 are: 1. Different carbon monoxide emission requirements: China 5 carbon monoxide content is 1000 milligrams per kilometer; China 6 carbon monoxide content is 500 milligrams per kilometer. 2. Different particulate matter emission requirements: China 5 particulate matter content is 5 milligrams; China 6 particulate matter content is 3 milligrams. 3. Different nitrogen oxide emission requirements: China 5 nitrogen oxide content is 60 milligrams; China 6 nitrogen oxide content is 35 milligrams. 4. Different non-methane hydrocarbon emission requirements: China 5 non-methane hydrocarbon content is 68 milligrams; China 6 non-methane hydrocarbon content is 35 milligrams.

[Kylie]

Last time I helped a friend choose a car, I ran into this issue. The most reliable method is to directly check the Vehicle Conformity Certificate, which clearly states whether it's China 5 or China 6. If there's no certificate, look for the environmental label sticker on the windshield—China 6 models will have a 'VI' mark. Another way is to check the engine model on the vehicle nameplate; China 6 engine numbers usually have a '6' suffix. A simple approach is to ask the salesperson for the environmental information list, which nowadays is mostly clearly labeled. Remember, China 6 is divided into phases a and b—most cars before 2020 are China 6a, while over 90% bought after 2023 are China 6b. To save trouble, the safest bet is to call the manufacturer's customer service with the VIN for verification.

[Josh]

Once, while accompanying a colleague for a vehicle inspection, I realized the distinction is quite straightforward. The new vehicle conformity certificate must indicate the emission standard level, and the environmental protection list attached to the purchase invoice will clearly state whether it's China 5 or China 6. For used cars, checking the registration date is the easiest method—those manufactured before July 2019 are mostly China 5, while those produced afterward are likely China 6. On the supplementary page of the vehicle registration certificate, there's an exhaust displacement section that can also provide clues, as China 6 vehicles often have special codes marked in this column. If you drive to an inspection station, using a diagnostic tool to read the OBD system will directly display the emission standard code, which serves as the ultimate proof.

[DeRhett]

You can make an educated guess just by looking at the vehicle's exterior. China VI models generally have a particulate filter installed at the end of the exhaust pipe, making the tailpipe noticeably thicker than China V models. Opening the engine hood reveals an additional carbon canister solenoid valve control module in China VI vehicles, with wiring as dense as a spider's web. Most newer models display a 'VI' badge on the rear, while for older vehicles, you need to check the vehicle identification plate. The 10th character of the VIN (starting with 'L') indicates the production year – 'J' stands for China V models produced in 2018, and 'L' represents China VI models made in 2020.

[DeLilliana]

Once, while helping a neighbor with a used car transfer, I got stuck on this issue. The most authoritative method is to check the vehicle model catalog on the Environmental Protection Bureau's official website—enter the brand and model, and the results appear instantly. To be safe, you should verify three credentials: the Roman numeral V or VI marked on the vehicle's environmental label, the emission level on the first page of the accompanying environmental compliance list, and the national standard number printed on the engine compartment nameplate. China 5 complies with the GB18352.5 standard, while China 6 follows GB18352.6. Note that implementation times vary by region; for example, Hainan Province implemented China 6 nationwide ahead of schedule in 2018.

[Parra]

Just helped my cousin inspect a new car last week. The China VI vehicle system hides an Easter egg—the emission standard is always listed in the About page of the vehicle settings menu. Nowadays, new models often have an environmental label inside the fuel tank cap: a yellow tag indicates China V, while a green one means China VI. The simplest method is to check the 8th digit of the vehicle's VIN—for China VI vehicles, this position is usually the letter F or G. During actual driving, China VI vehicles produce almost no black smoke from the exhaust pipe during cold starts, and the exhaust fumes are less pungent. The key is to check the Motor Vehicle Environmental Protection website—entering the 17-digit VIN directly displays the national standard level.