喷油器总成 5272937 0445120304 东风康明斯ISBe-EU4 原厂替换，恢复动力

This injector assembly is designed for Dongfeng Cummins ISBe-EU4 series engines, fits 2010-2015 medium trucks and buses (3.9L–5.9L), e.g., Dongfeng Tianlong, Liuqi Chenglong. It precisely controls fuel injection quantity and atomization, restoring engine power and reducing fuel consumption; fixes rough idle, weak acceleration. OEM 5272937, also compatible with 0445120002, 0445120379, 0445120083, 0445120250, among others. Replacement difficulty: medium; professional technician recommended; also clean fuel path and replace seals to prevent contamination. For bulk B2B customers, this injector uses 12V and 12 MPa standard pressure, matching factory parameters to reduce after-sales complaints.