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.

What kind of CUMMINS fuel injector will you get from Trade Ultra ?

1. You’ll get it all with; 100% O-ring replacement for proper sealing, a new Actuator Assembly, Spill Valve, To top it off, every nozzle is tested for 100% proper fuel delivery. It just doesn’t get much better than that.

2. Meticulous testing? You got it! This injector goes through a strict reassembling and testing process for fuel delivery, injection pressure, and timing. If you want more power and reduced emissions, this is the way to go.

3.To put things in perspective, you’re getting proper fit and function because strict OE specifications are met.