Description
2007 Buick Rainier 4.2L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2007 Buick Rainier 4.2L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with no dealer visit required.
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:
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Complete communication & CAN-bus verification
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Sensor input/output and signal integrity checks
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Injector & ignition pulse simulation
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Power, ground, and load-circuit analysis
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Flash memory integrity and checksum validation
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Thermal and voltage-stress testing to confirm reliability
This ensures a fully functional, reliable, plug-and-play module you can install with confidence.
Important Note
Some vehicles equipped with IMMO (Immobilizer) or PATS (Passive Anti-Theft System) may require additional key programming after installation. This is normal for models where security data must be synchronized with the vehicle’s body control system.
For a 100% plug-and-play solution with no relearns, no key programming, and no compatibility issues, we recommend our ECU Cloning Service, which transfers all original security, immobilizer, and configuration data directly into the replacement unit.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Tyler Murphy –
I was pleasantly surprised by how quickly this ECM arrived and how straightforward the installation was. It came pre-programmed to my VIN, which saved me a lot of time and hassle. Since swapping it in, my 2007 Buick Rainier has been running flawlessly with no check engine lights or drivability issues. The customer support was also very helpful in answering a couple of setup questions, making the entire process stress-free.
Sean Peterson –
This ECM arrived quickly and was already programmed for my VIN—installation was a breeze and my Rainier runs perfectly now. Couldn’t ask for a smoother plug-and-play experience!