Genuine OEM Volkswagen Exterior Mirror Housing, part number 5NM857507N9B9. This component forms the outer shell of the exterior mirror assembly, protecting internal components and providing a mounting point for the mirror glass and adjustment mechanisms. It is located on the driver's side of the vehicle. The finish is Satin Black, indicated by the 9B9 code. Genuine OEM mirror housings are manufactured with exact tolerances for proper fit and alignment.