Genuine OEM Audi Exterior Mirror Housing, part number 5K7857508K9B9. This component forms the main outer shell of the exterior rearview mirror, protecting its internal mechanisms and providing aerodynamic styling. It is designed for the left side of the vehicle and features a Satin Black (9B9) finish. Choosing genuine OEM ensures an exact fit, correct mounting points, and a durable, factory-matched finish that withstands environmental elements.