Cummins original 4088665 Common Rail Fuel Injector Diesel Engine Parts for X15 QSX15 ISX15 s Fits Excavator and Other Construction Machinery 4903455 4088723 4088725 original new injector

Engineered for demanding 15L-class diesel operations, the Cummins 4088665 fuel injector delivers dependable fuel delivery across QSK15, QSX15, ISX, ISX CM871, ISX15 and X15 engine families. Built as an HPI-type injector assembly, it supports Cummins HPI and HPI-TP Full Authority Electronic fuel systems and is widely cross-referenced under numbers such as 4088665RX, 4088665PX, 4076902, EX638665, 4928260, 4062569, 4088301 and 4088327 for straightforward part matching.

This injector provides precision fuel metering, stable atomization, and reliable sealing under high-temperature, heavy-duty conditions. It supports engine power recovery, fuel economy, and lower misfire risk, while tested flow performance and heavy-duty construction ensure consistent operation in generator sets, mining trucks, excavators, drilling rigs, compressors, marine auxiliary units and industrial power systems. Cross-number searchability and B2B catalog-friendly data make it well suited for repair shops, engine rebuilders and export distribution.

To maximize service life, use clean diesel fuel, replace fuel filters on schedule, drain the water separator, and control contamination during installation. Symptoms such as hard starting, rough idle, black smoke, power loss, high fuel consumption or injector circuit fault codes may indicate injector wear, nozzle clogging or seal damage. Final fitment must be confirmed by engine serial number, CPL, old injector number, injector body marking, fuel system type and equipment model before ordering.