Restore Peak Performance to Your Vehicle with a Programmed Engine Control Module
Is your Buick Regal, or another compatible GM vehicle, suffering from erratic engine behavior, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer that governs your engine’s performance. A faulty ECM can lead to a cascade of frustrating issues, from rough idling and stalling to a complete no-start condition. This replacement Engine Control Module, part number 12616889, is the definitive solution to restore your vehicle’s reliability and drivability.
The ECM is the brain of your vehicle’s engine management system. It processes data from dozens of sensors in real-time to precisely control fuel injection, ignition timing, emissions systems, and transmission shifting. When it begins to fail, the entire powertrain can be compromised. Don’t let a malfunctioning computer keep you off the road. This module is a direct-fit replacement, meticulously tested to meet or exceed original equipment standards.
From the Diagnostic Bay
We had a 2012 Chevy Impala come into the shop with a P0606 code (ECM/PCM Processor Fault) and a complaint of intermittent stalling at stoplights. The owner had already replaced the throttle body and a couple of sensors with no luck. After hooking up our diagnostic scanner, we noticed the live data stream for the oxygen sensors would occasionally freeze, a telltale sign that the ECM’s processor was struggling. Instead of continuing to chase phantom sensor issues, we installed a VIN-programmed ECM just like this one. The stalling vanished, the data stream stabilized, and the vehicle ran perfectly. It’s a classic case where the root cause was the central computer, not the components it was monitoring.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is illuminated, often with communication-related or processor fault codes (e.g., P0601, P0606).
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Unexplained drop in fuel efficiency.
- ✔ Rough or inconsistent idling.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Automatic transmission shifting issues, such as harsh shifts or getting stuck in gear.
- ✔ Misfire codes that persist even after replacing spark plugs and coils.
The Critical Advantage: VIN-Specific Programming
Simply installing a used or off-the-shelf ECM into your vehicle will not work. Modern vehicles require the ECM to be programmed with the specific Vehicle Identification Number (VIN) and the correct software calibration for its engine, transmission, and options. This process, often called ‘flashing,’ is essential for the module to communicate with other computers in the vehicle. We eliminate the need for an expensive trip to the dealership by performing this critical service for you. Before we ship your part, our technicians will use your VIN to load the latest, most stable software updates directly from GM. This ensures your 2011 Regal ECM arrives ready for a straightforward installation, saving you time, money, and hassle.
Installation and Compatibility
This Engine Control Module is a direct replacement for a wide range of General Motors vehicles, including the Buick Regal, LaCrosse, Allure; Cadillac CTS, SRX; Chevrolet Camaro, Impala, Equinox, Captiva Sport, Orlando; GMC Terrain; and Saab 9-5. It is compatible with multiple original part numbers, including 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993. Please verify the part number on your original module or consult the detailed fitment list to ensure compatibility.
While installation is plug-and-play, some vehicles may require a security relearn or crankshaft position sensor relearn procedure after the new module is installed. These procedures can often be performed without special tools and instructions are widely available online or in service manuals.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. The main benefit of our service is that we program the module for you before it ships. Simply provide your vehicle’s VIN during or after checkout, and we will flash it with the latest GM software specific to your car.
How do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Is this a simple plug-and-play installation?
Yes, the physical installation is plug-and-play. Because it comes pre-programmed, you avoid the need for dealership programming tools. However, some vehicles may require a simple, key-on/key-off security relearn procedure to sync the module with your anti-theft system.
Will this fix my check engine light?
If the check engine light and performance issues are caused by a faulty ECM, this part is the correct solution. It’s crucial to ensure your vehicle’s issues have been properly diagnosed before ordering.
What happens if I don’t replace a failing ECM?
Ignoring a failing ECM can lead to more severe problems, including catalytic converter damage from an incorrect air/fuel mixture, poor fuel economy, unpredictable stalling, and eventually, the vehicle may not start at all.
Does this part fit other vehicles besides the 2011 Regal ECM?
Yes, this module is a direct replacement for many GM vehicles from roughly 2010-2013, including models like the Chevy Equinox, GMC Terrain, Cadillac CTS, and more. Please refer to the detailed fitment list on this page to confirm it matches your specific make, model, and engine.