Genuine OEM Audi Door Mirror Base, part number 8T8857410J3FZ. This critical component houses the mirror's internal mechanisms, including motors and wiring, providing the structural foundation for the exterior mirror assembly. It is designed for the front right side of the vehicle, attaching directly to the door. The part features a 3FZ finish, typically a standard black or satin black. Weighing approximately 1.14 kg, it measures 0.37m in length. Using a genuine OEM mirror base ensures precise fitment, correct electrical connections, and factory-standard durability for reliable long-term operation.