Alliant Power AP55503 is a remanufactured common rail fuel injector for the 2003 to 2004 Dodge Ram 2500 and 3500 with the 5.9L Cummins ISB.
It replaces Cummins 5263318 and Mopar R8004082AA, R8004082AC and 68004082AA. Each injector comes with its O-rings installed.
Confirm Fitment Before You Order
Call 530-668-0818 with your VIN or engine serial number and we will confirm it is the right part before anything ships.
Specifications
| Part number | AP55503 |
|---|---|
| Brand | Alliant Power |
| Condition | Remanufactured |
| Injection system | Common rail |
| Core charge | Refundable in full when we receive your rebuildable core |
| Shipping weight | 1 lb |
Fits / Applications
- Dodge Ram 2500 (2003 to 2004), 5.9L Cummins
- Dodge Ram 3500 (2003 to 2004), 5.9L Cummins
- Cummins ISB
Part Numbers & Cross Reference
Cummins 5263318 · Cummins 5263318RX · Cummins 3947550 · Cummins 4940589 · Cummins 3949619 · Cummins 5254686 · Mopar R8004082AA · Mopar R8004082AB · Mopar R8004082AC · Mopar 68004082AA · Bosch (remanufactured) 0 986 435 503
In the Box
- 1x Remanufactured diesel fuel injector, O-rings installed
Frequently Asked Questions
Which trucks does AP55503 fit?
2003 to 2004 Dodge Ram 2500 and 3500 with the 5.9L Cummins.
What OE numbers does it replace?
Cummins 5263318, 3947550, 4940589, 3949619 and 5254686, Mopar R8004082AA, R8004082AB, R8004082AC and 68004082AA, and Bosch reman 0 986 435 503.
What comes in the box?
One remanufactured injector with the O-rings installed.
Ships by UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. A refundable core charge is added at checkout.





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