Bosch original Diesel Fuel Injector 0445120251, for heavy duty diesel engine application, 0445120237, 84347519, 0445120253, Common Rail High Pressure Replacement Injector original new injector

Built for demanding diesel appliions, the BOSCH 0445120251 is a new OEM common rail fuel injector from the Bosch 120 Series and CRIN injector family. Cross-referenced to Cummins 5263314, C5263314, 5263314RX and 5263314EX, it is intended for Cummins QSB5.9 and QSB6.7 industrial diesel engines. Its equipment coverage includes excavators, wheel loaders, forklifts, generator sets, agricultural tractors, marine engines, mining equipment and road construction machinery.

Operating at injection pressures up to 1,800 bar, the injector combines precision fuel metering with DLLA128P2198 nozzle technology to support fine atomization and consistent injection quantity. Bosch's control-valve design provides rapid response within the high-pressure common rail system, helping optimize combustion efficiency, fuel consumption and emissions. High-strength alloy steel and precision heat treatment support durability, while the design is aligned with Euro III, Euro IV and Euro V industrial engine requirements.

For distributors, fleet workshops and engine service operations, the 0445120251 offers a clearly identified replacement option backed by a 12-month warranty. Recommended installation practice includes clean injector seats and fuel rails, new sealing washers, calibrated torque tools, return-flow testing and ECU communiion checks. Service life is best supported by clean diesel, regular fuel-filter replacement, water-contamination prevention and avoidance of prolonged low-fuel-pressure operation. Symptoms such as hard starting, smoke, power loss, rising fuel consumption or excessive return flow should prompt appropriate injector diagnosis.