Bosch original Common Rail Fuel Injector 0445120035 0445120112 4940439 045120035, Replacement for OEM, Fit for QSL9, Construction Machinery original new injector

Built for high-pressure common rail systems, the BOSCH 0445120035 diesel fuel injector combines a multi-hole precision nozzle with a high-speed electromagnetic solenoid to deliver controlled fuel atomization. Designed for operating pressures up to 1600+ bar, it supports ECU-controlled injection timing and multiple injection events. These functions help improve combustion efficiency, fuel economy, power output and cold-start performance while reducing fuel consumption, particulate emissions and engine noise. Manufactured according to Bosch OE specifications, the injector is engineered for stable fuel delivery and dependable operation in demanding heavy-duty service.

Compatibility coverage includes Cummins ISBe 4.5/6.7, ISDe 4.5/6.7, QSB4.5, QSB6.7, B4.5 and B6.7 engine families, as well as industrial diesel platforms. Applications span Dongfeng Cummins and Foton Cummins trucks, heavy-duty commercial vehicles, passenger buses, construction machinery, generator sets, agricultural equipment, marine auxiliary engines and industrial power systems. The Bosch exchange number is 0986435503; documented Cummins cross references include 4937065, 3976372, 5258744, 4947582, 3973060, 4940170, 4988835, 3977081, 4937512 and 4937513.

For professional installation, clean the injector bore, replace the sealing washers, apply manufacturer-specified torque values and perform leak-off and rail-pressure checks; complete injector coding where required. Service life is supported by high-quality diesel, regular filter replacement and periodic return-flow inspection. The product is listed as new/genuine/OEM, with ISO9001/IATF16949 certification and a 12-month warranty, providing a clear OE-replacement option for commercial and industrial maintenance programs.