How to Identify National III, IV, and V Emission Standard Vehicles?

[VonElliot]

The simplest and most direct method is to check the vehicle's environmental protection label, which has clear markings on the back. Alternatively, you can log in to the Motor Vehicle Exhaust Pollution Supervision and Management Center for inquiries. The labels for National III, IV, and V standards are: National III, National IV, and National V. Below is an introduction to National III, IV, and V standards: 1. National III Standard: The National III standard refers to China's third-stage vehicle emission standards. The National III emission standard is equivalent to the European Euro III standard, meaning the content of tailpipe pollutants is similar to Euro III. The difference is that new vehicles must be equipped with an OBD (On-Board Diagnostics) system. The OBD system monitors vehicle emissions in real-time to ensure compliance, further guaranteeing the enforcement of Euro III emission standards. 2. National IV Emission: The National IV emission standard is China's fourth-stage motor vehicle pollutant emission standard. The main pollutants from vehicle emissions include HC (Hydrocarbons), NOx (Nitrogen Oxides), CO (Carbon Monoxide), and PM (Particulate Matter). Through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, these pollutants are controlled and reduced to specified levels. 3. National V Standard: The National V standard is equivalent to the European Euro V standard, which the EU has implemented since 2009. It imposes stricter limits on nitrogen oxides, hydrocarbons, and other vehicle emissions. From National I to National V, each upgrade in standards reduces single-vehicle pollution by 30% to 50%. Using new-standard gasoline and diesel will reduce multiple pollutants and cut PM2.5 emissions. From National IV to National V, environmental indicators are further tightened, with sulfur content reduced from 50ppm to 10ppm, significantly improving fuel quality.