Description
2005 Buick Century 3.1L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2005 Buick Century 3.1L 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






Scott Kelly –
The 2005 Buick Century ECM arrived quickly with free shipping, which was a pleasant surprise. The unit was VIN programmed and ready to install, making the swap straightforward without any extra work on my part. I appreciated how the seller stayed in touch throughout the process and answered all my questions promptly. Overall, great quality and service that got my car back on the road fast.
David Nichols –
Fast shipping and the unit was truly plug-and-play. Saved me a bundle over dealer prices and the install went without a hitch.
Cooper Ramirez –
I was really impressed with how smoothly everything went from start to finish. The 2005 Buick Century ECM arrived quickly with free shipping, which was a nice bonus. I appreciated that it came VIN programmed and ready to install, making the whole process plug-and-play without any extra hassle. The quality of the part feels solid, and my car has been running perfectly since the swap. Their team also answered a few questions I had promptly, which gave me extra confidence in my purchase. Overall, a stress-free experience and a great value.
David Lopez –
Programmed perfectly for my 2005 Buick Century, and the free shipping was a great bonus. Quick delivery and flawless setup made this a smooth purchase.