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c-ummins Fuel Injector 4903474 is a high-precision, OEM-grade performance fuel injector specifically developed for c-ummins M11 series diesel engines, including M11 CELECT, ISM11, and QSM11 variants. As a core component of the engine’s fuel supply system, it is responsible for atomizing diesel fuel into ultra-fine particles and delivering it to the combustion chamber with precise timing, stable pressure, and uniform distribution—directly affecting the engine’s power output, fuel efficiency, and emission compliance. Crafted from high-strength heat-resistant alloy steel through micron-level precision machining and rigorous heat treatment, this injector offers excellent durability, corrosion resistance, and high-temperature tolerance (up to 550℃), making it ideal for harsh working environments such as high pressure, heavy dust, long-term fuel erosion, and continuous heavy-load operations. It integrates advanced upgraded CELECT electronic control technology and a high-efficiency hydraulic servo system, achieving ultra-precise fuel metering (error ≤±0.08%) and ultra-fast response (＜0.9ms), which effectively eliminates fuel supply fluctuations and ensures consistent, reliable performance across all engine speed ranges. Its high-precision six-orifice nozzle, coated with a wear-resistant, anti-clogging, and anti-carbon deposition nano-ceramic layer, ensures uniform and fine fuel atomization, promoting complete combustion, reducing fuel consumption by 28-31%, and minimizing harmful emissions (NOx, particulate matter) to meet Euro V, China National V, and EPA Tier 4 Final emission standards. The optimized internal flow channel design reduces fuel resistance, improves delivery efficiency, and extends the injector’s service life. As a direct OEM replacement part, it perfectly matches the original engine’s dimensions, installation interface, and electrical parameters, requiring no modific-ations during installation, thus significantly saving maintenance time and labor costs. Each unit undergoes 100% pre-delivery comprehensive testing, including pressure tightness, flow rate calibration, spray pattern inspection, and fatigue resistance testing, complying with ISO 9001 and TS 16949 quality certific-ations. Tailored to the high-load, long-hour operating characteristics of M11 series engines, it is widely applied in heavy-duty trucks, large excavators, industrial generator sets, heavy construction machinery, and marine auxiliary engines, providing a reliable, efficient, and cost-effective maintenance solution for equipment operators. It is not compatible with ISBE series engine injectors (such as 0 445 120 007) listed in the engine model modific-ation notice issued by c-ummins (China) Investment Co., Ltd., as specified in the official announcement approved by the Ministry of Ecology and Environment of the People's Republic of China.

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