How to distinguish between China 4 and China 5 standards?

[HarmonyLynn]

Distinguishing between China 4 and China 5 standards can be done by: 1. Checking the vehicle's fuel consumption label; 2. Looking at the vehicle's nameplate to find the vehicle model number (a combination of numbers and letters), identifying the engine model, and then logging into the Motor Vehicle Environmental Protection Website to input the vehicle model and engine model for query. The China 4 emission standard is the national fourth-stage motor vehicle pollutant emission standard. The main pollutants emitted by vehicles include hydrocarbons, nitrogen oxides, carbon monoxide, and particulates. Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard controls and reduces vehicle emissions to below specified levels.

[JustinAnn]

Distinguishing between National 4 and National 5 mainly relies on checking the manufacturing year and environmental labels. From my car usage experience, the National 5 standard was implemented starting from 2017, so vehicles produced in 2017 and later are mostly National 5. You can check the environmental label on the vehicle body: a green pentagram usually indicates National 5, while blue indicates National 4. The VIN code is also crucial—the tenth letter represents the year, for example, 2017 is 'M' corresponding to National 5. Additionally, in some major cities like Beijing and Shanghai, National 4 vehicles might be restricted from entering certain zones, while National 5 vehicles face no issues. I recommend directly asking the salesperson for label information when buying a new car or checking the emission level by entering the license plate on the environmental protection bureau's website. This affects daily driving convenience and also relates to environmental protection, as National 5 has stricter emission controls and significantly less pollution. In short, checking the year and label is the simplest and most practical method.

[EmersonRose]

From the automotive industry perspective, distinguishing between National IV and National V standards is quite important. National V has lower emission levels, reducing pollutants by about 30%. For new cars, directly check the label marked "China V" (National V), while National IV is labeled "China IV". For used cars, check the registration date: most pre-2017 vehicles are National IV, while post-2017 ones are National V. Government websites or environmental protection apps can provide the most accurate information by entering the VIN code. I also recommend paying attention to this when purchasing a car, as National V vehicles may enjoy urban driving restriction exemptions, saving money and time. Technologically, the upgraded after-treatment system makes them cleaner to drive, though fuel consumption differences are minor. Don’t be misled by the lower prices of older cars; choosing National V is better for urban air quality.

[AshlynFitz]

Let me explain the differentiation methods from a technical perspective. The China 5 emission standard imposes lower limits on gases like NOx, and technically requires additional systems like DPF or SCR for exhaust treatment, whereas China 4 may only have basic controls. Check the manufacturing year: vehicles produced after January 2017 are generally China 5 compliant. Specific information can be found on the vehicle nameplate or user manual, or by entering the VIN on the official website to check the emission level. Performance-wise, China 5 vehicles are slightly optimized, but this doesn't significantly affect driving. The environmental impact is substantial, with China 5 vehicles emitting half the pollution. Simply checking the production year is sufficient for differentiation, no deep digging required.

[DeKeegan]

I have experienced the changes in emission standards. China 4 was used in the 2000s, and China 5 was promoted from 2017 onwards. The distinction can be made based on the vehicle manufacturing date: vehicles produced after 2017 are China 5. The color of the environmental label: green for China 5, blue for China 4. Older cars are mostly China 4, while new cars can confidently be chosen as China 5. In terms of policy, China 5 reduces pollution, making it more convenient for city driving with no restrictions. When buying a car, check the registration certificate which clearly states the emission standard. I use a mobile app to check the license plate and instantly know the standard. The difference in driving restrictions is obvious, as cities like Beijing, Shanghai, and Guangzhou only allow China 5 vehicles in core areas. In short, relying on the manufacturing date is the most reliable method.

[CalvinFitz]

It is necessary to distinguish between National 4 and National 5 standards for environmental protection. The National 5 standard is stricter, reducing pollutant emissions by 30%. The identification method is to check the environmental label: green for National 5, blue for National 4. New cars manufactured from 2017 onwards are all National 5. The purchase invoice or certificate will specify the standard. I recommend choosing a National 5 vehicle to support green travel and improve air quality. In some cities, National 4 vehicles face restrictions, while National 5 vehicles can travel without hindrance. Online inquiries are simple and quick. The environmental impact is significant, as National 5 makes breathing easier.