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
Nathan Collins –
The ECM arrived quickly and was already VIN programmed, making installation hassle-free. Their communication was spot on, answering all my questions promptly.
Jack Bailey –
I was a bit nervous about ordering an ECM online for my 2004 Jeep Wrangler, but this unit fit perfectly and came fully programmed to my VIN as promised. The process was straightforward, and I appreciated that they handled all the programming professionally—no extra trips to a mechanic needed. Shipping was surprisingly fast and didn’t cost an arm and a leg, which was a nice bonus. Once installed, my Jeep fired up without a hitch, and I noticed a smoother idle right away. Overall, a great experience from start to finish.
Ryan Taylor –
I ordered the 56044477AB ECM for my 2004 Jeep Wrangler, and the whole process was smooth from start to finish. They provided professional VIN programming service, so it was truly plug-and-play once I received it. Shipping was surprisingly quick and very reasonable, which made the experience even better. Their team also answered my questions promptly, making me feel confident about my purchase.