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
Ian Scott –
The ECM arrived quickly with free shipping, and the plug-and-play programming made installation effortless—definitely recommend.
Great communication throughout the process and the updated ECU works flawlessly in my 2004 Jeep Wrangler.
Super fast turnaround and the VIN programmed PCM fit perfectly, saving me a lot of hassle.
They answered all my questions promptly, and the quality of the ECM is top-notch for my Jeep.
Received my 2004 Wrangler ECM with very reasonable shipping, and it was ready to go right out of the box.
Ethan Mitchell –
I purchased the RL044478AE ECM for my 2004 Jeep Wrangler and was really impressed with how smoothly everything went. The unit arrived quickly with free shipping, and it was already VIN programmed, so installation was plug-and-play. The quality of the unit feels top-notch, and my Jeep runs perfectly now. Customer support was also very responsive, answering all my questions promptly, which made the process stress-free.