Description
The Mishimoto MMOC-RAM-03 is a direct-fit, stock-style replacement oil cooler engineered specifically for the 2003-2007 Dodge Ram 5.9L Cummins. Built with a bar-and-plate, stacked-plate core finished in anodized silver, this cooler is designed to restore proper oil-to-coolant heat transfer once a factory unit becomes clogged or starts leaking. It arrives complete with new gaskets, making it a straightforward swap for a tired original part.
Oil is the lifeblood of a hardworking diesel engine, and when a cooler starts to fail, oil can thin out and lose its ability to protect critical internal components. This Mishimoto cooling component is built to meet OEM quality standards, giving daily-driven 5.9L Cummins trucks the oil cooling capacity they need at an accessible price point. Whether you’re replacing a leaking factory oil cooler or simply refreshing aging cooling hardware, this Mishimoto oil cooler kit is engineered to fit your specific model without modification, and it’s backed by the Mishimoto Lifetime Warranty for long-term peace of mind.
Vehicle Applications
This Mishimoto oil cooler is a direct fit for the 2003-2007 Dodge Ram 2500 and 2003-2007 Dodge Ram 3500, both equipped with the I6 5.9L Cummins engine. It is designed as a stock-style replacement for these specific model years and applies to chassis codes DR, DH, D1, DC, and DM.
Features
- Direct fit for the 2003-2007 Dodge Ram 5.9L Cummins
- Replaces a clogged or leaking stock oil cooler for renewed reliability
- Meets OEM quality standards to restore daily driving performance
- Includes all gaskets needed for a compatible installation
- Bar-and-plate, stacked-plate core construction
- Anodized silver finish
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-RAM-03
- Product Type: Cooling
- Color/Finish: Silver, Anodized
- Core Type: Bar-and-Plate
- Core Construction: Stacked Plate
- Grade Type: Performance
- Core Height: 1.48 in
- Core Thickness: 2.96 in
- Core Width: 6.98 in
- Overall Width: 5.55 in
- Overall Height: 1.86 in
- Overall Length: 11.41 in
- Inlet/Outlet Fitting Type: AN Flare (Male)
- Inlet Outside Diameter: 0.67 in
- Outlet Outside Diameter: 0.67 in
- Includes: (1) Oil Cooler, (2) Oil Cooler Gaskets, Mishimoto Lifetime Warranty
- Engine Codes: 5.9L Cummins
- Chassis Codes: DR, DH, D1, DC, DM
Frequently Asked Questions
What vehicles does the Mishimoto MMOC-RAM-03 oil cooler fit?
It is a direct fit for the 2003-2007 Dodge Ram 2500 and 2003-2007 Dodge Ram 3500, both with the I6 5.9L Cummins engine.
What does this oil cooler kit include?
The kit includes one oil cooler, two oil cooler gaskets, and coverage under the Mishimoto Lifetime Warranty.
What type of core does this Mishimoto oil cooler use?
It uses a bar-and-plate, stacked-plate core construction finished in anodized silver.
What fitting type does the Mishimoto MMOC-RAM-03 use?
It uses AN Flare fittings with a male gender on both the inlet and outlet, each with a 0.67 in outside diameter.
Is this a stock-style replacement or a performance upgrade?
It is offered as a stock-style replacement cooler designed to restore and improve the engine’s oil cooling capability, built to meet OEM quality standards.
What warranty comes with this Mishimoto cooling component?
It is backed by the Mishimoto Lifetime Warranty.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
