Description
2004 Toyota Tundra 3.4L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Toyota Tundra 3.4L 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
Jeremy Bates –
I was a bit nervous about ordering an ECU online for my 2004 Toyota Tundra, but this unit exceeded my expectations. It arrived quickly with free shipping, which was a nice bonus. The best part was that it came VIN programmed, making installation straightforward—almost a plug-and-play experience. The truck fired right up and runs like new, no issues at all. I’m very impressed with the quality and the hassle-free process.
Jordan Hudson –
I ordered the 89661-0C400 ECM for my 2004 Toyota Tundra, and I’m really impressed with the quality of the part. The unit arrived quickly with free shipping, which was a nice bonus. They also handled the VIN programming before shipping, so it was truly a plug-and-play experience. Customer support was very responsive when I had a few questions, making the whole process smooth and hassle-free.
Blake Morris –
Fast shipping and the ECU arrived perfectly programmed for my 2004 Tundra—plug and play, no hassle at all.
Patrick Morris –
I was really impressed with how smooth the whole process was. Ordering the 89661-0C400 ECM for my 2004 Toyota Tundra was straightforward, and the fact that it came VIN programmed saved me a ton of hassle. The free shipping was a nice bonus, especially since I needed it quickly. When I had a couple of questions about installation, their team responded promptly and helped me feel confident before plugging it in. After swapping the unit, my truck ran like new again—no hiccups or error codes. Definitely a reliable place to get ECU replacements.