Why is a Euro 4 vehicle classified as China III?

[GarrettMarie]

Euro 4 vehicles being classified as China III is due to: errors made by inspection station staff. Not all vehicle models are included in the inspection station's environmental testing system. If the owner's vehicle model cannot be found, the staff may manually input the model for convenience, which automatically generates China III. Additional information: 1. Euro 4 emissions are equivalent to China IV emissions: The Euro IV standard refers to the Euro IV emission standard, which was implemented at the end of 2005 and is an important standard for vehicle exhaust emissions, currently enforced in most countries. This standard requires diesel cars to emit no more than 250 milligrams of nitrogen oxides per kilometer; vans and SUVs must not exceed 390 milligrams of nitrogen oxides per kilometer. 2. China III: The abbreviation for the national third-stage emission standard, equivalent to the Euro III emission standard. This means the content of tailpipe pollutants is equivalent to Euro III, with the only difference being that new vehicles must be equipped with an OBD (On-Board Diagnostics) system.