What is China IV?

[StSienna]

China IV refers to the National Phase IV Motor Vehicle Pollutant Emission Standards. Methods to check a vehicle's emission standards include: 1. Checking the vehicle's environmental protection label; 2. Reviewing the vehicle's factory certificate or vehicle conformity certificate; 3. Logging into the Motor Vehicle Environmental Protection Public Inquiry Platform; 4. Differentiating based on the vehicle's manufacturing year. Vehicle emission standards regulate the permissible levels of harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot emitted from vehicle exhaust. These standards are established to prevent pollution from compression-ignition and gas-fueled spark-ignition engine vehicles, protect the ecological environment, and safeguard human health.

[AshlynDella]

I remember China IV is the fourth stage of China's emission control standards, commonly referred to as 'Guo Si' indicating a vehicle's exhaust emission meets this level. It was roughly promoted around 2010 to reduce pollutants like carbon monoxide and nitrogen oxides. From an environmental perspective, China IV significantly improved urban air quality, especially with stronger PM2.5 particulate control, which I think greatly benefits public health. However, with China VI now in place featuring stricter standards, older China IV vehicles may face restrictions in some major cities' low-emission zones. If you drive a China IV vehicle, pay extra attention to regular emission testing and ensure the OBD system functions properly—don't overlook this detail as exceeding limits can easily lead to fines. Overall, China IV served as a transitional phase that advanced clean technology development, but environmental awareness must continue to strengthen.

[DiCole]

As a veteran driver with over a decade of experience, I'm very familiar with the China IV emission standards. It's the abbreviation for the fourth phase of national emission standards, which became mandatory in the 2010s. Back then, many regions tightened inspections, and I saw numerous car owners needing to upgrade systems or replace parts due to failing emission tests. There are still plenty of China IV vehicles on the road today, but don't think they're outdated - their emission limits are actually much stricter than China III, reducing PM10 pollution by about 50%. I recommend owners regularly maintain exhaust systems and catalytic converters to prevent carbon buildup. After all, the higher the standard, the faster used car values depreciate. China IV vehicles are still decent for daily commuting now, but they're less stable and reliable long-term compared to China VI. Understanding these points can help you avoid detours and prevent being pulled over on the road.

[Donna]

China IV is the fourth stage of the national vehicle emission standards, and it's also correct to simply call it China 4. It mainly targets pollutant limits, such as CO and HC emissions, which are much lower than China III. This standard is developed based on Euro IV and measures effectiveness through tests like driving cycles. I understand it's crucial for new vehicle certification—China IV vehicles must be equipped with more exhaust treatment devices to avoid high pollution. Simply put, you can check the nameplate or environmental label when choosing a car.

[DiEdward]

I've been paying attention to emission standards since I bought my car. China IV is indeed the designation for the fourth phase, which became widespread after 2010. As a young car owner, my biggest concern is urban driving restrictions: China IV vehicles sometimes face limitations entering city centers, especially in large cities with strict air quality control. Compared to China V or China VI, its emissions are still relatively high. I recommend checking the manufacturing year carefully during used car transactions to avoid being misled. In terms of maintenance, be aware that aging spark plugs and oxygen sensors can easily cause emissions to exceed standards, and regular cleaning can extend their lifespan. Actually, China IV vehicles are still usable now, but you need to adapt to policy changes and plan for upgrades early.