Bosch original Common Rail Fuel Injector 0445120046 0445120094 0445120120 0445120053 Replacement OEM Cross Reference, for heavy duty diesel engine application original new injector

Designed for electronically controlled diesel fuel delivery, the BOSCH 0445120046 is an original-new, high-pressure common rail injector in the 120 Series. The common rail maintains fuel at approximately 1,000–2,000 bar independently of engine speed. ECU signals actuate the injector’s controlled solenoid or piezo valve to meter injection events, while the multi-hole nozzle delivers fine atomization. High-precision components support multiple injections per combustion cycle when commanded by the ECU, promoting complete combustion, lower emissions and improved fuel economy.

Precision-machined, high-tolerance parts resist wear under high pressure, while industrial-grade alloys provide thermal and vibration durability. OEM-calibrated performance meets Bosch fuel-delivery tolerances; controlled spray patterns optimize combustion, and multi-level sealing supports leak resistance. Documented cross references are 0445120209, 0445120254, 3968546 and 3968846. Exact nozzle and valve codes may vary by calibration variant, so buyers should verify the required calibration before ordering.

Listed compatibility includes Cummins ISB 4.5/6.7 and QSB 5.9/6.7, Mercedes-Benz OM642/OM651, VW TDI, and BMW N47/N57 engines. Applications span trucks, SUVs and passenger cars, generators, compressors, pumps, marine equipment, tractors and harvesters. Professional installation requires clean fuel lines, new sealing washers and O-rings, OEM-specified clamp-bolt torque, system bleeding and priming, and ECU coding when required. ULSD fuel, timely filter replacement and diagnostic performance logging support routine maintenance.