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FREE LIFETIME WARRANTY
PRODUCT HIGHLIGHTS
- This is a Dodge OEM computer for a 5.9L Diesel ECM Ram Diesel 5.9L .
- LIFETIME WARRANTY w/ Core Exchange.
- Plug and Play No need to visit a Dodge dealership!
- Fully rebuilt, programmed, and tested for quality.
- Fully programmed to your exact VIN. You'll provide your VIN # after purchase.
- All of the latest software updates from Dodge will be installed.
- We VIN Match Part# to Guarantee correct unit. (No Part# Required).
- Need a different model year? We have Diesel Dodge ECMs for model years 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 and 2007.
REQUIRED INFO
- VIN# (17 characters - can be found on dashboard or on registration card)
EXCHANGE PROCESS
- Your Lifetime Warranty is activated when you send us your old rebuild-able part in an exchange.
- We will include a FREE return shipping label in the package for you, so you can easily send us your old part and complete the exchange.
ADDITIONAL INFORMATION
SKU | 200K8 |
---|---|
Condition | Refurbished |
Make | Dodge |
Model | 5.9L Diesel ECM |
Engine Size | 5.9L |
Regular Price | $1895.00 |
Sale Price | $1295.00 |
Stock | IN STOCK |
2003 Dodge Ram 5.9L Diesel ECM
Details of the 2003 Ram Diesel Control Module
Designed for the 2003 Dodge Ram, this functional ECM restores the 5.9L Cummins ISB diesel engine’s efficiency, shifting to a high-pressure common rail system from the VP44 pump. It supports 48RE automatic or NV5600 manual transmissions for SLT and Laramie trims. In 2003, Dodge introduced enhanced OBD-II diagnostics for better emissions compliance.
Technical Specifications
- Engine Fitment: Calibrated for 5.9L Cummins ISB with common rail.
- Transmission Integration: Compatible with 48RE or NV5600.
- Part Numbers: 680XXXX series (check fitment).
- Diagnostics: Enhanced OBD-II for 2003 standards.
Core ECM Functions
- Controls common rail injection for precise fuel delivery.
- Manages turbo boost for enhanced towing power.
- Processes fuel pressure, knock, and throttle sensor data.
- Ensures transmission coordination for smooth performance.
Role for 2003 Ram Owners
This restored ECM supports the 2003 Cummins engine’s transition to common rail technology, delivering smoother operation than 2002’s VP44 system. It provides high torque for heavy hauling, critical for the 2003 Ram’s durability. Unlike 2006’s CAN-bus diagnostics, the 2003 ECM uses advanced OBD-II, reviving reliable performance. The module ensures the 2003 Dodge Ram excels as a powerful diesel truck for tough tasks.
HOW DOES IT WORK?
Not sure this will work? Order RISK-FREE!
SEND IT TO ME NOW!BUYER BEWARE! NOT ALL COMPUTER SELLERS ARE EQUAL.
We are the ONLY company that runs every computer through a computer aided vehicle simulator to test for quality and compatibility with your car & VIN.

OVER 150,000 Customers Served
Every unit is programmed & tested in our facility in Cary NC
CarComputerExchange fully rebuilds and tests ALL computers. We are the ONLY seller that runs each computer through a computer aided vehicle simulator that tests every circuit in the module. Other companies run limited tests.
Most companies run limited tests. Some online stores simply repaint old units and sell without testing. Don't fall for the CHEAPER option.

Our testing & rebuilding process starts with a deep visual evaluation of the circuit board and all the electronic components. From water or acid corrosion, to fire or burn damage, we pay attention to every detail. We also scan the ECU memory or CPU to make sure that it is working properly.

We then test the ECU's with our proprietary electronic lab equipment on our bench, which emulates the car's engine to ensure accuracy in every diagnosis.