Description
2004 Jeep Wrangler 4.0L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Jeep Wrangler 4.0L 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
Cole Chapman –
I was a bit nervous about ordering an ECM online, but this 56044478AA for my 2004 Jeep Wrangler came exactly as described and was already VIN programmed, which made installation a breeze. The whole process was smooth because they offer a plug-and-play setup, so I didn’t have to worry about any complicated programming steps. Shipping was surprisingly fast and very affordable, which was a huge plus. I also appreciated the team’s quick responses whenever I had a question. Overall, the Jeep runs perfectly now, and I’m really glad I found this service.
Owen Nichols –
Received my programmed ECM quickly with free shipping, and it fit perfectly—no issues at all. The whole process was smooth and hassle-free.
Victor Marshall –
I’m really impressed with the quality of the 56044478AA ECM I received for my 2004 Jeep Wrangler. The plug-and-play setup made the installation straightforward, and it came VIN programmed, so I didn’t have to worry about any additional steps. Shipping was reasonably priced and arrived quicker than expected. The engine runs smoothly now, and I appreciate the professional service behind this product.