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
Robert Murphy –
I ordered the 56044478AE ECM for my 2004 Jeep Wrangler and was very impressed with the service. The unit arrived quickly with free shipping, which was a nice bonus. The ECU came VIN programmed and was truly plug-and-play, so installation was straightforward without needing extra tuning. Their customer support was also excellent, answering all my questions promptly.
Kyle Webb –
I was a bit nervous ordering an ECM online, but this 56044478AE for my 2004 Jeep Wrangler arrived quickly and was already VIN programmed, which made installation a breeze. The plug-and-play setup saved me a lot of time and hassle compared to other parts I’ve tried in the past. I also appreciated that the seller provided free shipping—definitely a plus when ordering heavy components like this. After swapping it in, my Jeep fired up immediately and runs smoothly without any error codes. It’s clear they know their stuff and take care to deliver quality products that fit perfectly.
Mark Peterson –
I recently purchased the 56044478AE ECM for my 2004 Jeep Wrangler, and I couldn’t be happier with the experience. The unit arrived quickly with free shipping, which was a nice bonus. What really impressed me was the plug-and-play setup—they had it VIN programmed before shipping, so installation was straightforward and hassle-free. I reached out with a couple of questions, and their team responded promptly with clear answers. Overall, the whole process was smooth, and my Jeep is running better than ever.
Chase Miles –
The ECU arrived quickly with free shipping, and it was already VIN programmed—installation was a breeze. Their communication was spot on, answering all my questions right away.