Genuine OEM Audi Left Exterior Mirror Base Assembly, part number 82C857409F9B9. This assembly comprises the main housing and internal mechanisms of the vehicle's left-hand side exterior mirror, providing the foundation for the mirror glass and outer cover. It is positioned on the front left side of the vehicle, securely attaching to the door. The base assembly is finished in Satin Black (9B9) and weighs approximately 1.36 kg. Choosing genuine OEM ensures precise fitment, correct electrical connections, and the robust internal components necessary for reliable mirror operation and safety.