Fits for Cummins Oil Cooler 3959031,24V 5.9L Dodge 03-07 Ram 2500 3500

Oil Cooler for Cummins

This oil cooler (OEM cross-reference 3959031) is designed for the 24-valve 5.9L Cummins diesel engine in 2003–2007 Dodge Ram 2500 and 3500 trucks, helping regulate engine oil temperature for consistent performance.

Overview

This oil cooler directly replaces the factory unit on 2003–2007 Dodge Ram 2500 and 3500 trucks equipped with the 24V 5.9L Cummins diesel engine, using OEM part 3959031. It keeps engine oil at the proper temperature to prevent overheating and extend engine life, making it essential for heavy hauling and towing applications.

Built For Performance

• Aluminum core with brazed construction for efficient heat transfer and durability
• Direct bolt-on design uses factory mounting points for easy installation
• Includes new gaskets and O-ring seals to prevent oil leaks
• Tested to withstand high-pressure and high-temperature diesel engine conditions

Fits These Machines

• for Dodge Ram 2500 2003–2007 with 5.9L Cummins 24V
• for Dodge Ram 3500 2003–2007 with 5.9L Cummins 24V
• for Cummins 5.9L 24-valve diesel engines in these truck models

On-The-Job Use

• Replaces failed or clogged oil coolers causing high engine temperatures during towing
• Installed during engine rebuilds or major service intervals on Dodge Ram trucks
• Essential for maintaining oil temperature in commercial fleet vehicles and work trucks

Specs At A Glance

Good To Know

Q: Will this oil cooler fit a 2004 Dodge Ram 2500 with the 5.9L Cummins? A: Yes, it is designed for 2003–2007 models with the 24V 5.9L Cummins, including the 2004 Ram 2500.

Q: Do I need to replace the oil filter adapter when installing this cooler? A: No, the oil cooler mounts to the existing oil filter adapter; you only need to clean the mounting surface and use the supplied gaskets.

Slight variation in finish or dimensions may occur between production runs, and confirm compatibility before ordering.