This engine control unit (ECU) is designed for use in a 2006 Chevrolet HHR. It is a genuine OEM part with part number 12605548 YNAC. This ECU is compatible with HHRs equipped with a 2.2L or 2.4L engine. It is in good working condition and has been tested to ensure proper functionality. This ECU has been removed from a running vehicle and is ready for immediate installation. It is an essential component of your vehicle's engine management system and is responsible for controlling various aspects of engine performance. Buy with confidence knowing that this ECU has been thoroughly inspected and is ready to provide reliable performance.