How to Distinguish Between National IV and National V for Trucks?

[LeRemington]

Trucks are distinguished between National IV and National V mainly based on emission standards. The following are the specific details: 1. Sulfur Emissions: The upper limit for sulfur content emissions under the National IV standard is 50mg/kg, while under the National V standard, it is 10mg/kg. 2. Particulate Matter: The National V emission standard requires the particulate matter emission limit to be below 0.0045g/km, whereas the National IV emission standard requires it to be between 0.025-0.060g/km. 3. Nitrogen Oxides: Under the National V standard, nitrogen oxide emissions for light-duty vehicles are reduced by 25%, and for heavy-duty vehicles, they are reduced by 43%.

[DeMaya]

I remember when I changed my truck a few years ago, I also had to distinguish between China IV and China V standards. My method was to first check the vehicle nameplate, which has the production date and emission standard code; most China V vehicles were produced after 2017, while China IV ones were earlier. Then I would look at the vehicle registration certificate, where the environmental protection bureau's stamp provides detailed information—China V is marked as V standard. If that information was incomplete, I would use a mobile app to scan the VIN code and input it into the system to check, or directly call the vehicle management office to confirm. In terms of driving, China V engines are quieter because they have a urea injection system that treats exhaust more cleanly. Distinguishing these is quite important to avoid buying a high-emission vehicle and facing fines or driving restrictions. Doing some homework before buying a car saves trouble later on.

[StNora]

As a frequent car repairer, I distinguish this by direct inspection. First, plug in the OBD scanner to read fault codes and emission data - China V vehicles generally display higher nitrogen oxide control levels. Then check the exhaust system components: China V trucks usually have a DPF (Diesel Particulate Filter) and SCR (Selective Catalytic Reduction) tank, visible when opening the hood; China IV might only have a simple catalytic converter. I pay attention to the engine label's model number - China V models start with specific sequences. Additionally, listen to the idle sound and check exhaust smell after starting - China V runs smoother with less exhaust odor. Document these during regular maintenance to help clients avoid misjudging model years or emission standards.

[MiguelAnn]

I think distinguishing between China IV and China V is important because China V has lower emissions and better environmental performance. A simple method is to look at the environmental label on the car. If there's a green car graphic with 'GB V' below it, it's China V, while 'GB IV' indicates China IV. Also, check the production year; most cars launched after 2018 are China V, while older cars are generally China IV. When buying a car, it's best to bring a knowledgeable friend for a test drive to experience the differences in acceleration and fuel consumption. Protecting the environment is everyone's responsibility. Choosing a China V car reduces air pollution and makes driving more worry-free.

[StAva]

From a regulatory perspective, the China 5 standard is significantly stricter than China 4. The primary method to distinguish is by checking the vehicle conformity certificate or accompanying documents, where the government-issued environmental protection list clearly indicates the standard level. Next, check the vehicle registration date: China 5 vehicles were registered between 2017 and 2023, while China 4 vehicles were registered earlier. During routine maintenance, pay attention to components like the urea tank, which is mandatory for China 5 vehicles but absent in China 4 systems. Also, remember that the vehicle annual inspection report states the emission level. Ensuring the correct standard helps comply with policies and avoid penalties.

[Gregory]

Here's a handy tip for differentiation: inspect the truck's exterior details. First, open the door and check the production label on the side pillar - China V models often have specific letters like V at the beginning. After starting the engine, China V vehicles exhibit more stable idle RPM and lower noise levels; take a short test drive to feel smoother acceleration. Also, check the dashboard indicator lights - China V models have a urea level display. When purchasing, clarify the vehicle's age and original documents, as China V trucks are generally newer with lower maintenance costs. Regularly checking these details helps avoid mistakenly buying non-compliant vehicles that could affect driving.