Description
2004 Jeep Grand Cherokee 4.7L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Jeep Grand Cherokee 4.7L 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
Allan Little –
I purchased the 56044778AA ECM for my 2004 Jeep Grand Cherokee, and it arrived quickly with free shipping, which was a great bonus. The unit was VIN programmed as promised, making installation hassle-free and plug-and-play. Customer support was very responsive and answered all my questions promptly, which gave me confidence throughout the process. Overall, the quality and service exceeded my expectations.
Max Ramirez –
I recently purchased the 56044778AA ECM for my 2004 Jeep Grand Cherokee, and I’m really impressed with the whole experience. The unit arrived quickly and was already VIN programmed, which saved me a lot of hassle. What stood out was how smoothly the plug-and-play setup worked—just swapped it in, and my Jeep fired right up without any issues. The customer service was also top-notch; they responded promptly to my questions and kept me informed throughout the process. Overall, a great purchase that got my vehicle back on the road faster than I expected.
Zachary Richardson –
I was really impressed with the quality of the ECM I received for my 2004 Jeep Grand Cherokee. The unit came VIN programmed and ready to go, which made installation a breeze without needing any extra trips to the shop. Shipping was surprisingly fast and affordable, so I didn’t have to worry about extra costs piling up. Throughout the process, the seller kept me informed about the status of my order, which I appreciated a lot. My Jeep runs flawlessly now, and I’m very happy with the whole experience.
Chase Cook –
Received my programmed ECM for my 2004 Jeep Grand Cherokee quickly with free shipping—installation was straightforward and everything runs perfectly.
Great communication throughout the process, and the plug-and-play setup made replacing my Jeep’s ECM hassle-free.
The updated PCM for my Jeep came fast, and their professional programming service meant no extra trips to the shop—highly recommend.