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 Edwards –
I was impressed with how quickly this ECM arrived, and the free shipping was a nice bonus. The unit came VIN programmed and ready to install, which saved me a lot of hassle. The quality of the part is excellent, and my Jeep runs better than ever. Customer service was also very responsive when I had a couple of questions before ordering.
Noah Cox –
I was a bit nervous ordering an ECU online, but this unit for my 2004 Jeep Wrangler arrived faster than expected, and it was already VIN programmed, which made installation straightforward. The shipping was free, which was a nice bonus, and the quality of the module is outstanding—my Jeep runs smoothly now with no error codes. I appreciated how the seller answered all my questions promptly when I called to confirm compatibility. Overall, a hassle-free experience that got my Wrangler back on the road quickly. Highly recommend this product if you need a reliable ECM replacement.
Brian Bailey –
Fast shipping and the unit came pre-programmed perfectly for my Jeep—plug-and-play made installation a breeze.