China's exports of used commercial vehicles and construction machinery have grown rapidly recently. Many foreign trade merchants fail to clear customs or even face shipment returns due to unfamiliar local emission access rules. China National IV, V and VI standards correspond to Euro IV, Euro V and Euro VI respectively, with vastly different access thresholds across overseas markets.
Technically, the three standards impose increasingly strict emission limits. China IV equals Euro IV with basic exhaust treatment and no particulate trap. China V matches Euro V equipped with SCR urea systems, cutting pollutant emissions by 25% compared with China IV. China VI b is stricter than Euro VI, mandating particulate traps and real-road emission tests with drastically lower exhaust limits.
African markets adopt loose regulations. Major destinations such as Kenya and Nigeria accept China IV vehicles, while China VI models see little demand. Southeast Asia is tightening policies: Myanmar and Cambodia permit China IV imports, yet Vietnam and Thailand require at least China V. GCC Middle Eastern countries including Saudi Arabia and the UAE enforce Euro V or higher with GCC certifications, barring all China IV units.
European countries and South American nations like Brazil and Argentina follow the strictest Euro VI rules, only allowing China VI vehicles for import.
Industry insiders suggest verifying target countries' emission and age limits in advance to avoid port detention and economic losses.
