Description
2004 Buick Regal 3.8L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Buick Regal 3.8L models.
Each unit is VIN-programmed, updated, and fully tested.Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
This is not a brand-new unit. It is a rebuilt unit that is inspected, refreshed, and fully tested before shipping.
Testing includes communication, CAN-bus, sensor signal, power circuit, flash memory, and reliability checks.
Important Note
If your vehicle does not have an IMMO or PATS system, this unit will be directly plug&play.
If your vehicle has an IMMO or PATS system, it will require a key relearn after installation. You can visit your local locksmith for help.
We also offer a full cloning service. We transfer all security data to the replacement unit, so it will be a plug&play installation.
For all European cars, Hyundai, and Kia vehicles, we recommend adding our cloning service as a bundle.
For American and Japanese cars, we recommend doing a key relearn on-site.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Cooper Douglas –
Super fast shipping and the plug-and-play setup made installing this ECM for my Regal a breeze!
Caleb Poole –
Shipped quickly and arrived ready to install—this plug-and-play ECM saved me a ton compared to dealer prices. Installation was a breeze and the communication was spot on.
Kevin Ramirez –
I was a bit nervous about ordering an ECM online, but this 2004 Buick Regal 3.8L unit arrived quickly with free shipping, which was a nice surprise. The ECU came VIN programmed and ready to install, so I didn’t have to worry about any complicated setup. Once installed, my car fired right up and runs smoother than it has in years. I also appreciated how the seller kept me in the loop throughout the process and answered all my questions promptly. Definitely a reliable source for replacement parts.
Colin Carter –
I ordered the ECM for my 2004 Buick Regal and was really impressed with how smooth the process went. The unit arrived quickly with free shipping, which was a nice bonus. They provided professional VIN programming, so installation was plug-and-play with no issues. Their communication throughout the order was excellent, and they promptly answered all my questions.
Ian Young –
I was really impressed by how quickly this ECM arrived—shipping was definitely faster than I expected. The unit came fully programmed for my 2004 Buick Regal, and installation was straightforward since it was plug-and-play. Thanks to this purchase, I avoided a hefty dealer bill and the whole process was handled with professional communication from start to finish. Overall, a smooth experience that saved me both time and money.