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
Brian Tucker –
Received the 20325253AB ECM for my 2004 RAM 5.9L Cummins, and the whole process was smooth from start to finish. The unit arrived quickly with free shipping, which was a nice bonus. What impressed me most was how they programmed the ECU specifically to my VIN, so installation was literally plug-and-play with no extra hassle. Definitely pleased with the quality and service.
Jonah Peterson –
I needed a replacement ECM for my 2004 RAM 5.9L Cummins, and this unit fit perfectly. The fact that it came VIN programmed saved me a ton of hassle—just plug and play, no extra trips to the shop. The shipping was surprisingly quick and didn’t cost an arm and a leg, which I really appreciated. Customer service was responsive and kept me updated throughout the process, so I felt confident my order was handled right. After installation, my truck runs smoother than before, so I’m very happy with the quality and ease of this purchase.
Scott Burton –
I needed a replacement ECM for my 2004 Ram with the 5.9L Cummins, and this unit worked perfectly right out of the box. The VIN programming was spot on, so installation was straightforward and hassle-free. Shipping was surprisingly fast and affordable, which was a nice bonus. The seller also kept me informed throughout the process, making the whole experience smooth and reassuring.
Neil Lewis –
The ECU arrived quickly with free shipping, and the plug-and-play setup made installation a breeze. Great service and flawless performance!
Zachary Peterson –
Fast shipping and the VIN programming was spot on—installed with zero hassle and runs perfectly.
They answered all my questions quickly and the plug-and-play setup made replacing my ECM a breeze.
Super impressed with the professional programming service and how smoothly the unit works in my 2004 Cummins.
Reasonable shipping cost and the quality of this ECM is top-notch, it’s like getting a brand new truck.
Great communication throughout the process and the fast turnaround meant my truck was back on the road in no time.