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
Trevor Stewart –
I bought the 56044478AB ECM for my 2004 Jeep Wrangler and was pleasantly surprised by how easy the whole process was. The unit arrived quickly with free shipping, which was a nice bonus. They also took care of all the VIN programming for me, so it was truly plug-and-play—no hassle at all. The Jeep runs smoothly now, and I’m really happy with the quality and service.
Cooper Cox –
I was really impressed with how smoothly everything went when I ordered the ECM for my 2004 Jeep Wrangler. The unit arrived quickly with free shipping, which was a nice bonus. What stood out most was that it came VIN programmed and ready to install—no extra hassle or trips to the mechanic needed. The quality of the part feels very solid, and my Jeep runs like new again. They also kept me informed throughout the process, which gave me confidence in the purchase. Overall, a five-star experience from start to finish.
Noah Richardson –
I was nervous about ordering an ECM online, but this 2004 Jeep Wrangler ECM arrived quickly with free shipping and was exactly as described. The best part was that it came VIN programmed, so it was truly a plug-and-play replacement. Installation was straightforward and my Jeep fired right up without any issues. Throughout the process, the seller kept me informed and answered all my questions promptly, which made the whole experience stress-free. I highly recommend this service to anyone needing a reliable ECM for their Wrangler.
Caleb Peterson –
The ECU arrived quickly with free shipping, and the plug-and-play setup was exactly as promised—super easy and hassle-free.