The Cadillac STS ECM Engine Control Module Computer 05–07 OEM 12600794 E55 YLXW is a genuine part manufactured by Cadillac specifically for the 2005-2007 model years. This Engine Control Unit (ECU) is designed for easy installation on the left side of the vehicle. Made of high-quality aluminum material, this ECM features a durable surface finish and comes with a manufacturer warranty of 1 month. With its reliable performance and compatibility with the Cadillac STS, this OEM part ensures optimal control and functionality of the vehicle's engine.