Cummins original Replacement for OEM 4088301 Diesel Fuel Injector Engine Parts for ISX15 X15 CM870 Engines Fits 3307D SRT45 Excavator Crosses 4088301-PX 4089972 4954434 original new injector
Product Details
Cummins original Replacement for OEM 4088301 Diesel Fuel Injector Engine Parts for ISX15 X15 CM870 Engines Fits 3307D SRT45 Excavator Crosses 4088301-PX 4089972 4954434 original new injector
Fuel Type | Diesel |
Condition | Original Type / Reman Replacement |
Applicable Engine | Cummins ISX, QSX, QSX15, ISX15, X15, ISX CM570, ISX15 CM2250, ISX15 CM870; QSK15 / QSKX15 used as inquiry-matching unless confirmed by engine serial number, CPL and injector tag |
Injector Type | HPI Engine Injector Assembly |
Quality Standard | OE Replacement / OEM Type |
Packaging | Optional Full-Set Supply, Standard Protective Packaging |
Fuel System | Fuel Injection System |
OE Number | 4088301 |
Brand | Cummins |
Cross Number / Universal Number | 4088301PX, 4088301RX, 4088301NX, 1480758301, EX634434, 4954434, 4088301R, 4088301S |
Vehicle / Equipment Application | Truck repair, excavator maintenance, generator set service, mining equipment, oilfield machinery, construction equipment, rail-related engines, industrial diesel power units, fleet maintenance |
Application Type | Heavy-Duty Diesel Repair / Industrial Applications |
Engineered for demanding heavy-duty service, the Cummins 4088301 diesel fuel injector delivers precise fuel metering across the ISX, QSX, QSX15, ISX15 and X15 engine families. Designed as an original-type HPI injector assembly, it supports the fuel injection system with fine atomization and stable delivery, restoring engine performance in trucks, excavators, generator sets, mining machinery and oilfield equipment.
Strong cross-reference coverage makes this injector easy to identify and source. It aligns with alternative numbers 4088301PX, 4088301RX, 4088301NX, 1480758301, EX634434, 4954434, 4088301R and 4088301S, providing broad PX/RX/NX search recognition for aftermarket repair channels. For QSK15 and QSKX15 platforms, use inquiry-matching confirmed by engine serial number, CPL and injector tag. The QSX15 is a 15-liter, six-cylinder engine rated 500–675 hp with 1650–2050 lb-ft torque, serving agriculture, construction, mining, oil and gas, rail and drilling duties.
This replacement injector supports stable idle, power recovery and reduced smoke potential when properly installed. Optional full-set supply, testing support and global aftermarket availability strengthen fleet maintenance programs. For reliable results, use clean diesel fuel, replace fuel filters on schedule, drain the water separator, check return flow and scan ECM fault codes when performance issues arise, following the exact engine manual and duty cycle.
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