In which year were the National III emission standards implemented for vehicles?

[OTravis]

The National III emission standards for vehicles were implemented on July 1, 2007. 1. The National III standard refers to China's third-stage vehicle emission standards. The National III emission standards are equivalent to European emission standards in terms of tailpipe pollutant levels, with the difference being that new vehicles must be equipped with OBD, the On-Board Diagnostics system. 2. The On-Board Diagnostics system features an increased number of detection points and detection systems, with oxygen sensors installed at both the inlet and outlet of the three-way catalytic converter. It ensures compliance with the standards through real-time monitoring of vehicle emissions, thereby better guaranteeing the enforcement of emission standards. 3. Compared to National II vehicles, National III vehicles are more fuel-efficient. For models around 5 tons, fuel consumption is reduced by approximately 1 liter per 100 kilometers, and for 10-ton models, the reduction is around 2 liters. However, this is only achievable under long-distance and stable driving conditions. For short-distance operations, the impact on fuel consumption is minimal.