Description
2004 Lexus IS300 3.0L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Lexus IS300 3.0L 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
Jordan Palmer –
The ECU arrived quickly with free shipping and was already programmed perfectly for my 2004 Lexus IS300—super easy plug-and-play. Their communication was spot on, answering all my questions within hours.
Luis King –
I was really impressed with how smooth the entire process went. The ECM arrived quickly with free shipping, and it was already VIN programmed, so installation was a breeze. The quality of the part feels top-notch, and my IS300 runs perfectly now. Plus, their customer support was very responsive when I had a couple of questions before ordering.
Bruce Adams –
I ordered the 89661-53530 ECM for my 2004 Lexus IS300 and was really impressed by how smooth the process was. They offer free shipping, which was a nice bonus, and the unit arrived faster than I expected. The ECU came already VIN programmed, so installation was straightforward with no hassle. What stood out to me was their quick response to my questions before purchase, which gave me confidence. Overall, the quality of the part is top-notch, and I haven’t had any issues since swapping it in. Highly recommend this seller if you need a reliable ECM.
Aiden Bates –
I had been having trouble with my 2004 Lexus IS300’s engine control for a few weeks, so I decided to order this ECM. The unit arrived quickly and the shipping cost was surprisingly reasonable, which was a nice bonus. What really stood out was the plug-and-play setup—once I installed it, everything synced up perfectly without any extra hassle. The car runs smoother than it has in years, and I’m impressed with the build quality of the part. Definitely a solid purchase that saved me a lot of time and stress.