Bosch original Common Rail Fuel Injector 0445120038 Replacement for OEM 4945463, 4993482 for QSL QSL9 Diesel Engine, compatible with 3965749 for Truck original new injector

Built around Bosch CRIN120 common rail technology, the 0445120038 (0 445 120 038) is an original OEM diesel fuel injector for heavy-duty engine and equipment applications. Its cross-reference coverage includes OE numbers 3965749, 4945463 and 4993482, with replacement references 0445120050, 0445120070 and 0445120133. Documented engine compatibility covers Cummins QSL8.9, QSL9, QSC8.3 and ISC engines, supporting accurate sourcing across industrial, generator, marine and construction equipment platforms.

The electronically controlled solenoid injector operates within a high-pressure fuel rail system and supports common rail direct injection at pressures up to 1,800 bar. Responding to ECU signals, the solenoid meters fuel with precise timing, while precision nozzle holes atomize diesel for delivery into the combustion chamber. This process supports combustion efficiency, fuel economy, power output, cold starting and emissions reduction. Micron-level machining tolerances, hardened steel components, corrosion protection and an optimized spray pattern contribute to wear resistance and continuous-duty industrial service.

Typical equipment uses include excavators, loaders, generators, mining and agricultural machinery, road construction equipment, industrial compressors, and oil and gas equipment. For reliable installation, clean the fuel system, replace filters, inspect the rail and injector seat, fit new sealing washers, follow OEM torque specifications, and program injector codes where required. Post-installation leakage, rail-pressure, injector-balance and ECU communication checks are recommended. Bosch OEM quality and a 12-month warranty complete this B2B replacement solution.