How to Distinguish Between China 5 and China 6 Vehicles?

[LaJaxson]

China 5 emission standard is marked with a V, while China 6 emission standard is marked with a Ⅵ, both using Roman numerals. There are four methods to check the emission standard: 1. Check the vehicle's environmental protection label on the windshield; 2. Log in to the website of the Motor Vehicle Exhaust Pollution Supervision and Management Center to inquire, or bring the vehicle registration certificate to the vehicle management office for inquiry; 3. Refer to the vehicle's factory certificate for details; 4. Estimate based on the year of vehicle registration: most vehicles registered after 2008 are China 4, while those registered in 2007 could be either China 3 or China 4, and so on.

[Vicki]

The most reliable way is to check the vehicle documents. The second page of the motor vehicle registration certificate clearly indicates whether it's China 5 or China 6, and the environmental protection information sheet that comes with the vehicle also prints it clearly. You can also make an educated guess by checking the production date - domestically produced gasoline vehicles manufactured after July 2019 are mostly China 6 compliant, while imported vehicles might be slightly later. Another method is to open the engine hood and look for a carbon canister and particulate filter, as China 6 vehicles are generally equipped with these two components to reduce exhaust pollution. The simplest way is to download the 'Auto Environmental Protection Network' APP, enter the VIN, and the emission level will pop up immediately - personally tested and completed in just three minutes.

[MacHarmony]

When repairing cars, I mainly focus on three aspects: First, checking the engine model parameters - engines compliant with China VI emission standards usually carry a GPF mark; Second, testing the OBD interface - China VI vehicles will display fault codes starting with PN when the malfunction indicator light is on; Third, the catalytic converter models differ - China VI models have significantly thicker catalyst coatings. As a side note, don't casually refuel China VI vehicles at small gas stations, as low-quality gasoline is particularly prone to clogging the particulate filter, with repairs costing at least 2,000 yuan. It's best to take a monthly highway drive to allow the exhaust system to fully self-clean.

[DiElijah]

Price is also a good indicator. Back in the summer of 2019 when China 6 standards were first implemented, China 5 vehicles were all being cleared out at rock-bottom prices. Currently in the used car market, for Passats of the same model year, China 6 versions are about 5,000 yuan more expensive than China 5 versions. Remember to check the environmental label on the windshield - a blue oval sticker with 'VI' in the middle indicates China 6. Another characteristic of China 6 vehicles is their fuel tank caps are sealed as tightly as canned food, designed to prevent gasoline evaporation and air pollution.

[EllianaLynn]

Open the fuel tank cap and you'll understand: China VI vehicles have two sealing rings at the fuel filler neck, making a particularly noticeable clicking sound when inserting the fuel nozzle. There's also a difference in sound during idle—China VI cars maintain 1200 RPM for several minutes after cold starts, only dropping after the exhaust pipe heats up. There's an additional exhaust fault light on the dashboard, the one that looks like a trident symbol. China VI vehicles have very fast fuel pump shutoff—it's not the gas station shortchanging you, but because the fuel tank's charcoal canister is filled with activated carbon filtration devices.

[DiTessa]

Easiest way to remember emission standards: Nationwide China 6 mandate took effect in July 2020, so nearly-new cars after 2020 are mostly compliant. Pre-2017 vehicles are definitely China 5. For 2017-2019 transition period models, check the 10th VIN digit: L means 2020 production (China 6), K is 2019 (possibly China 5). Mobile lookup is more accurate - search 'Vehicle Emission Inquiry' in Alipay, enter license plate to instantly display standard rating, much faster than checking manuals.