Genuine OEM Audi Exterior Mirror Base, part number 4F1857409AK01C. This component forms the robust foundation for the exterior mirror assembly, providing secure mounting for the mirror glass, motor, and housing. It is positioned on the left front side of the vehicle. Weighing approximately 1.05 kg, this part is finished in black (01C). Choosing a genuine OEM mirror base ensures precise fitment, correct electrical connections, and factory-matched contours for seamless integration with the vehicle's body.