Description
2004 RAM Ram Truck (Cummins) 5.9L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 RAM Ram Truck (Cummins) 5.9L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with our cloning service.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
Complete communication & CAN-bus verification
Sensor input/output and signal integrity checks
Injector & ignition pulse simulation
Power, ground, and load-circuit analysis
Flash memory integrity and checksum validation
Thermal and voltage-stress testing to confirm reliability
Important Note
Some vehicles with IMMO or PATS require key programming after installation. This is normal.
For a 100% plug-and-play solution, we recommend using our full cloning service. We transfer all security data to the replacement unit.
A prepaid shipping label will be emailed to you. Allow you to mail in your original computer to us for full cloning.
If cloning is not selected, the ECU will be VIN programmed, and a key relearn will be required after installation.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Aiden Richardson –
Fast shipping and the plug-and-play programming made installing this ECM a breeze—my truck runs like new!
Joel Evans –
I was really impressed with the service I received for this 2004 Ram Truck ECM. The unit arrived VIN programmed, so all I had to do was install it—no extra hassle or trips to the shop. Shipping was free and arrived quicker than I expected, which was a huge plus since I needed my truck back on the road fast. The quality of the module is top-notch, and the truck runs smoothly now without any warning lights. Overall, a stress-free experience from start to finish.
Henry Morgan –
Fast shipping and the VIN-programmed ECU fit perfectly with my 2004 Ram Cummins—super easy plug-and-play. Highly recommend!
Harvey Watson –
I ordered the 20325231AA ECM for my 2004 RAM Cummins and was really impressed by how smoothly everything went. The unit arrived quickly with free shipping, which was a nice bonus. What stood out the most was their professional VIN programming service—the plug-and-play setup had my truck running perfectly without any hiccups. Throughout the process, their team was quick to answer all my questions, making me feel confident about my purchase.
Diego Lopez –
I purchased the 20325231AA ECM for my 2004 RAM with the 5.9L Cummins, and the entire process was smooth from start to finish. They offer free shipping, which was a nice bonus, and the unit arrived quickly and exactly as described. What impressed me most was the professional programming service—they had the ECU VIN programmed perfectly before it shipped, so it was truly plug-and-play. I ended up saving a lot of time and hassle thanks to their expertise.