Cummins original 5491515 Common Rail Fuel Injector for Cummins ISG12 ISG QSG ISX QSX Diesel Engine Construction Machinery Injection Nozzle Assy Replacement OEM 4307475 original new injector

Engineered for the demanding requirements of modern heavy-duty diesel platforms, the Cummins XPI Common Rail Fuel Injector 5491515 delivers OEM-calibrated fuel metering for ISG11.8, ISG12, QSG12, and X12 engine series. Manufactured to original equipment specification, this injector features precision nozzle machining, hardened valve components, and a corrosion-resistant coating that support stable performance under extreme operating conditions across transportation, power generation, and industrial applications.

Cross-referenced with 4307475, 5491515PX, 4307475RX, 4307468, 5461710, 5491531, 5572006, 5491661, and 4384786, this injector offers broad compatibility for Dongfeng Tianlong, KL, and KC trucks, buses, mining and construction machinery. Its ultra high pressure capability and optimized spray pattern promote improved combustion efficiency, reduced particulate and NOx emissions, enhanced fuel economy, and superior cold starting. Reliable atomization ensures balanced cylinder operation and consistent engine response throughout the service cycle.

Designed to resolve common failure conditions including hard start, no start, white/black/blue smoke, engine knock, misfire, power loss, high fuel consumption, injector leakage, poor atomization, and abnormal rail pressure, this component helps fleets and equipment operators lower operating costs and reduce maintenance requirements. With longer service life and dependable Euro V and Euro VI emission performance, it is a trusted replacement solution for the global diesel engine market.