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
Victor Stewart –
The VIN programmed ECM arrived quickly with free shipping and was exactly as described—installation was a breeze. Customer support was super responsive when I had questions.
Jorge Clark –
I purchased the 4090071 ECM for my 2004 RAM Cummins, and it arrived quickly with free shipping, which was a nice bonus. The unit was already VIN programmed, so installation was straightforward and hassle-free. Their team responded promptly to my questions, making the whole process smooth and reassuring. The truck runs perfectly now, and I’m very satisfied with the quality of the product and service.
Adam Mitchell –
The ECM arrived quickly with free shipping, and the plug-and-play programming made installation a breeze. Great service all around!