Description
2004 Buick Century 3.1L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 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
Benjamin Jenkins –
Fast shipping and the ECU came perfectly programmed—plugged right in with zero hassle. This saved me a ton compared to dealer prices and the service was really professional.
Zachary Keller –
I’m really impressed with this 2004 Buick Century ECM. The shipping was surprisingly quick, and the unit was truly plug-and-play—installation took no time at all. The best part is that this saved me a fortune compared to dealer prices. Communication with the seller was smooth, making the whole process stress-free.
Ian Adams –
The VIN-programmed ECM fit perfectly and was ready to go out of the box; their free shipping was a nice bonus.
Fast turnaround and the plug-and-play setup made this replacement a breeze—great service from start to finish.
They answered all my questions quickly and kept me informed throughout the process; the updated ECM works flawlessly.
Quality repair and very reasonable shipping costs—highly recommend for anyone needing an ECM for their Buick.
The programming was done professionally, and the unit fired right up with no issues. Excellent communication all around.
Adrian Howard –
I’m really impressed with the updated ECM for my 2004 Buick Century. The unit arrived quickly with very reasonable shipping costs, which was a bonus. It was already VIN programmed, so installation was straightforward and saved me a lot of hassle. The quality of the repair is top-notch, and my car runs like new again.