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
Shane Reynolds –
I was a bit nervous ordering an ECM for my 2004 Ram Cummins, but this unit arrived exactly as described and was already VIN programmed, so installation was straightforward. The seller kept me in the loop the whole time, answering my questions promptly and making sure I understood the process. Shipping was free and arrived quicker than I expected, which was a huge relief since I needed my truck back on the road fast. After swapping the unit in, my Ram fired up with no issues and runs better than it has in years. Definitely a trustworthy source for anyone needing a reliable ECM.
Scott Peterson –
I purchased the 20325253AD ECM for my 2004 Ram 5.9L Cummins, and I’m really impressed with how smooth the whole process was. The unit arrived quickly with free shipping, and it was already VIN programmed, so installation was straightforward. I had a few questions before ordering, and their customer service responded promptly, which gave me confidence in the product. Since installing it, my truck runs perfectly, just like new.
Joel Nichols –
Super fast shipping and the ECM arrived perfectly programmed for my 2004 Ram 5.9L—plug-and-play was exactly as promised.
Mark Tucker –
I was really impressed with the quality of this 2004 RAM ECM. The unit came VIN programmed and ready to install, which saved me a lot of time and hassle. Shipping was free and arrived quicker than I expected. The seller also responded promptly to my questions, making the entire process smooth and worry-free.
Russell Roberts –
I was really impressed with how smooth the entire process was from start to finish. The ECM arrived quickly and was already VIN programmed, which saved me a ton of time and hassle. The seller kept me updated throughout, answering all my questions promptly and clearly. Installation went flawlessly, and my 2004 Ram’s engine runs like new again. Plus, the shipping cost was very reasonable, making this an even better deal. Definitely a trustworthy source if you need an ECU replacement.
Mark Lawrence –
Fast shipping and the pre-programmed ECU fit perfectly in my 2004 Ram 5.9L Cummins with zero hassle—highly recommend!