Genuine OEM Audi Exterior Mirror Mounting, part number 420857410. This component serves as the primary mounting bracket for the exterior mirror assembly, providing a secure attachment point to the vehicle body. It is located on the exterior of the vehicle, housing the mirror's adjustment mechanisms. The weight of this part is approximately 0.594 kg. Genuine OEM parts are critical for exterior mirrors to ensure precise alignment, proper aerodynamic function, and long-term durability against environmental factors.