Bosch 0445120328 Common Rail Diesel Injector Assembly

The Bosch 0445120328 is a solenoid-actuated common rail diesel injector designed for high-pressure direct injection systems. It features a 7-hole nozzle (DLLA128P2316) optimized for precise fuel atomization and combustion efficiency in Cummins QSB series engines. The injector body is constructed from high-strength steel to withstand system pressures up to 1,600 bar. This unit serves as a direct OEM replacement for Cummins part number 5273750. Manufactured to ISO 9001 and TS 16949 standards, the assembly includes the injector solenoid, control valve, and nozzle assembly. It is engineered for 4-stroke, multi-cylinder diesel engines found in construction machinery such as Komatsu hydraulic excavators and on-highway heavy-duty truck applications. The injector ensures reliable cold start performance, reduced emissions, and consistent power output across the operating range.