Description
Bosch 0445120238 is a new Genuine Bosch common-rail fuel injector for the 2004.5-2007 Dodge Ram 2500 / 3500 with the 5.9L Cummins ISB common-rail engine. Bosch is the OE supplier for the 5.9L common-rail fuel system, and the 0445120238 supersedes the Bosch 0445120208 / 0445120114 / 0445120032 service injectors used on this engine. Each injector ships with the necessary copper sealing washers and O-rings.
Signs You Need a New Fuel Injector
- Rough idle, cylinder misfire, or knock under load
- Excessive white or black smoke at idle and acceleration
- Hard start or extended cranking
- Power loss, hesitation, or surging
- Fuel in oil or excessive return-line volume on balance test
Specifications
| Manufacturer | Bosch |
|---|---|
| Part Number | 0445120238 |
| Part Type | Fuel Injector (common rail) |
| Condition | New OEM (no core required) |
| Engine Compatibility | Cummins ISB 5.9L 24V common rail |
| Years | 2004.5-2007 |
| Application | Dodge Ram 2500 / 3500 |
| Includes | Copper sealing washers and O-rings |
Cross References
This part replaces or is equivalent to the following part numbers:
- Bosch: 0445120238, 0445120208, 0445120114, 0445120032, 0986435505
- Cummins: 3964273, 3968158, 3972887, 3972888, 4937700, 4937701, 4940051, 5254688, 5254689, 5263316
- Mopar: 5135790AA, 5135790AB, 5135790AC, 5135790AD
- Mopar Reman: R5135790AB, R5135790AC, R5135790AD, R5135790AE, R5135790AF, R8310746AA
- Alliant Power: AP55505
Applications
This fuel injector fits the Cummins ISB 5.9L 24V common-rail engine in:
- 2004.5-2007 Dodge Ram 2500 (5.9L Cummins, all trims)
- 2004.5-2007 Dodge Ram 3500 (5.9L Cummins, all trims)
Important Installation Notes
- Replace all six injectors as a set on high-mileage engines for balanced cylinder output.
- Always install new copper sealing washers and high-pressure lines per Cummins service procedure.
- Verify engine serial number (ESN) and injector trim code before installation — calibration differences may exist across builds.
Verify your engine serial number and configuration before ordering to confirm fitment.
