When did the China III emission standard come into effect?

[GarrettDella]

The China III emission standard was implemented on July 1, 2008. Here are detailed introductions about the China III standard: 1. Overview: The China III standard is the abbreviation for the National Phase III Emission Standard, equivalent to the Euro III emission standard. This means the tailpipe pollutant levels under China III are comparable to Euro III. However, China III mandates that new vehicles must be equipped with an OBD (On-Board Diagnostics) system. 2. China III Engines: China III engines improved upon China II engines by modifying internal structures, typically involving components such as cylinder heads, intake and exhaust manifolds, valves, camshafts, pistons, and corresponding auxiliary mechanisms. These modifications aim to reduce emissions without compromising power, requiring higher precision for each component, though external differences are not significant.