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
Matthew Morris –
I was really impressed with how smoothly everything went when I ordered the ECM for my 2004 RAM Cummins. The fact that it came VIN programmed saved me a ton of hassle since I didn’t have to do any extra coding or take it to a shop. Shipping was free and arrived sooner than I expected, which was a pleasant surprise. The truck fired right up with no issues, and I noticed my engine running much smoother. Overall, this was a solid purchase, and the professional setup made the entire process stress-free.
Brandon Baker –
ECM arrived quickly with free shipping and was perfectly programmed for my 2004 Ram; installation was seamless and the truck runs great.
Great communication throughout the process and the plug-and-play setup made replacing my RAM’s ECM hassle-free—highly recommend!
Fast turnaround and the updated ECM works flawlessly; the team answered all my questions promptly, making the whole experience stress-free.
Jorge Gray –
I purchased the 20325253AN ECM for my 2004 Ram Cummins, and the whole process was seamless thanks to their professional VIN programming service. The unit arrived quickly with free shipping, which was a nice bonus. Their team answered all my questions promptly and kept me updated throughout the shipping and programming stages. Installation was straightforward, and my truck runs like new again.
Travis Poole –
The ECU arrived quickly with free shipping and was perfectly programmed for my 2004 RAM Cummins—installation was a breeze.
I had a few questions before ordering, and their team responded promptly with clear answers, making the whole process smooth and worry-free.
Plug-and-play setup made this ECM swap super easy, and the turnaround time was faster than I expected.
Great quality and professional VIN programming saved me hours of hassle—highly recommend for anyone needing a reliable ECM.
Shipping was very reasonable and the communication was top-notch; they kept me informed every step of the way.