How to Determine Whether a Diesel Truck is National III or National IV?

[LillianaMarie]

To determine whether a diesel truck is National III or National IV, you can use the following methods: 1. Check the vehicle's environmental protection label: The simplest and most direct method is to look at the vehicle's environmental protection label, which has clear markings on the back. 2. Log in to the "Motor Vehicle Environmental Protection Website" for inquiry: Enter the brand and model from the vehicle's registration certificate. 3. Inquire at the vehicle management office: Bring the motor vehicle registration certificate (original or copy will suffice). 4. For new vehicles, check the vehicle's factory certificate: However, the certificate is usually kept at the vehicle management office, so it is advisable to make a copy when purchasing a new vehicle for backup. Additional information: National III, National IV, and National V refer to China's emission standards for motor vehicles at different stages, primarily aimed at controlling and reducing vehicle pollutant emissions. The later the standard, the more energy-efficient and environmentally friendly it is. Specific details are as follows: 1. National III emission standard: This is China's third-stage motor vehicle pollutant emission standard, equivalent to the European Euro III standard, with pollutant levels similar to Euro III. 2. National IV emission standard: This is China's fourth-stage motor vehicle pollutant emission standard. Vehicle pollutants mainly 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, the standard controls and reduces vehicle pollutant emissions to below specified levels. 3. National V emission standard: This is China's fifth-stage motor vehicle pollutant emission standard, issued by the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Committee on December 18, 2013. Compared to the fourth-stage standard, the National V standard significantly reduces vehicle pollutant emissions, cutting nitrogen oxide and particulate emissions by 25% and 80%, respectively, for new vehicles, and overall emissions for in-use vehicles by 10% to 15%, which is of great significance for improving air quality.