Cummins original Common Rail Diesel Fuel Injector 1000019903 4955524 0986435912 4964170 for Cummins Machinery Engine Injector Replacement, compatible with multiple engine series original new injector

Built for demanding, long-hour diesel service, the Cummins QSK19 Diesel Fuel Injector 1000019903 is a heavy-duty common rail injection component for accurate fuel metering and high-pressure atomization. By supporting stable combustion, it helps restore engine power, maintain fuel economy, and promote dependable operation across large Cummins QSK engine applications. The injector is an original-quality replacement solution for professional maintenance and engine rebuilding.

The main reference is 1000019903, with 0986435912 identified as a strong cross-reference. Additional Bosch-style references include F00BJ10006, F00BJ60578, and F00BJ60783; FO0BJ60578 and FOOBJ60783 also appear as alternate listing formats. Public listings associate the injector with Cummins QSK19, QSK38, QSK50, and QSK60 engines. These references support aftermarket sourcing, but they are not official Cummins interchange confirmation, and adjacent part numbers should not be assumed to be direct replacements.

Its application coverage makes the part relevant to generator sets, G-Drive engines, mining trucks and drills, marine propulsion and auxiliary engines, oilfield frac units, drilling rigs, rail equipment, industrial power units, construction machinery, and emergency or rental power systems. It also serves diesel repair shops, fleet maintenance providers, and engine rebuilders. Before quotation or shipment, confirm fitment using the engine serial number, CPL, removed injector number, injector body marking, Bosch and Cummins numbers, fuel system type, ECM calibration, and equipment model.