Product Description
The CUMMINS 3959031 OEM ENGINE OIL COOLER is designed for 2003–2007 5.9L Cummins ISB diesel engines. This genuine Cummins oil cooler is built to help regulate engine oil temperature while maintaining OE fitment, cooling performance, and long-term reliability.
Use this part when servicing engine oil temperature issues, oil cooler failure, oil contamination concerns, or during engine repair and rebuild work. Always verify fitment by year, make, model, engine, and engine serial number before ordering.
FEATURES
- Genuine Cummins OEM engine oil cooler
- Direct-fit replacement for 5.9L Cummins ISB applications
- Designed for 2003–2007 Dodge Ram 2500/3500 5.9L Cummins
- Helps maintain proper engine oil temperature
- Recommended for engine repair, cooling system service, or rebuild work
- Built for diesel engine durability and reliability
FITMENT
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins
- 5.9L Cummins ISB common-rail diesel engines
- Additional Cummins ISB applications may apply when verified by engine serial number
WHAT'S INCLUDED
- 1 Cummins 3959031 OEM Engine Oil Cooler
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3959031
- Engine oil cooler gaskets
- Engine oil cooler housing components
- Cooling system service parts
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3959031
- Part Type: Engine Oil Cooler
- Engine Compatibility: 5.9L Cummins ISB
- Fitment Years: 2003–2007
- Vehicle Application: Dodge Ram 2500 and 3500
- Condition: New
FAQ
Will this oil cooler fit my truck?
This oil cooler is designed for the 2003–2007 Dodge Ram 2500/3500 with the 5.9L Cummins engine. Always verify your year, make, model, engine, and engine serial number before ordering.
Is this a direct replacement?
Yes. Cummins 3959031 is designed as a direct-fit OEM replacement engine oil cooler for the listed applications.
What is included?
This listing includes one Cummins 3959031 OEM engine oil cooler.
When should an engine oil cooler be replaced?
An oil cooler should be inspected or replaced when there are oil temperature issues, internal leakage, contamination concerns, cooling system problems, or during major engine repair work.
Do I need any related parts?
Inspect the oil cooler gaskets, seals, oil cooler housing, coolant system components, and engine oil condition during installation and replace worn parts as necessary.
