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
Gavin Graham –
I was really impressed with the quality of this ECM for my 2004 Ram with the 5.9L Cummins. The unit arrived with the VIN already programmed, making installation completely plug-and-play, which saved me a lot of hassle. Shipping was also very reasonable and fast, so I had my truck back up and running sooner than expected. Communication was clear throughout the process, and they answered all my questions quickly.
Kyle Turner –
I ordered the 20325253AA ECM for my 2004 RAM 5.9L Cummins and was really impressed by how smoothly everything went. The unit arrived quickly with free shipping, which was a nice bonus. The programming was done professionally and it was ready to plug and play right out of the box. Their team also kept me informed throughout the process, making the whole experience stress-free.
Samuel Taylor –
I needed a replacement ECM for my 2004 Ram Cummins and was a bit nervous about ordering online. This unit arrived quickly with free shipping, which was a nice surprise. The best part was that it came VIN programmed, so installation was basically plug-and-play. The truck fired right up and has been running perfectly ever since. They even answered a couple of questions I had before purchase, which made the whole process feel trustworthy and smooth. Overall, really happy with the quality and service.
Gavin Webb –
The VIN programmed ECM arrived quickly with free shipping, and it was a perfect plug-and-play fit—saved me a ton of hassle.
Great communication throughout the process and the updated ECU worked flawlessly in my 2004 Ram Cummins.
Really impressed with the fast turnaround and the professional programming service they provided for my PCM.
Super reasonable shipping costs and the unit was ready to install right out of the box, no extra tuning needed.
They answered all my questions promptly and the ECM they sent me performed better than expected.
Jonah Sharp –
Fast shipping and the ECM came perfectly programmed for my 2004 Ram 5.9L—plug-and-play with zero hassle.