The Cummins fuel injector with part number 4902921PX is a common rail fuel injector used in various Cummins diesel engines, particularly in ISX15 and QSX15 applications. Here are some key details about this part:
1. Cummins ISX15 (2013 and Later – Common Rail Systems)
ISX15 (2013–2017) – Used in trucks like Kenworth T680, Peterbilt 579, Freightliner Cascadia (with EPA 2013/2017 emissions compliance).
ISX15 (2017+) – Updated versions with XPI (Extreme Pressure Injection) improvements.
2. Cummins QSX15 (Industrial & Off-Highway Applications)
Used in construction equipment, marine engines, and power generation units with Common Rail fuel systems.
3. Potential Cross-Reference & Replacement For:
Older injector part numbers like 4902921, 4902921P, 4902921R (always verify exact compatibility).
Some QSX15 engines may use variants of this injector.
Important Notes:
4902921PX is a Common Rail injector—earlier ISX15 engines (pre-2013) used HEUI injectors (e.g., 4088985, 5288985) which are not compatible.
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