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c-ummins Fuel Injector 4903319 is a high-precision, industrial-grade OEM replacement fuel injector specifically designed for c-ummins M11 series diesel engines, including M11 CELECT, ISM11, and QSM11 variants. As a vital core component of the engine’s fuel supply system, it is responsible for atomizing diesel fuel into fine particles and delivering it to the combustion chamber with precise timing, stable pressure, and uniform distribution—directly determining the engine’s power output, fuel efficiency, and emission compliance. Crafted from high-strength heat-resistant alloy steel through precision machining and rigorous heat treatment, this injector boasts exceptional durability, corrosion resistance, and high-temperature tolerance (up to 540℃), 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 CELECT electronic control technology and a high-efficiency hydraulic servo system, enabling ultra-precise fuel metering (error ≤±0.10%) and ultra-fast response (＜1.0ms), which effectively eliminates fuel supply instability and ensures consistent performance across all engine speed ranges. Its high-precision five-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 26-29%, 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 relevant engine model change announcements, as specified in the engine model modific-ation notice issued by c-ummins (China) Investment Co., Ltd..

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