Genuine OEM Audi Door Mirror Glass, part number 11C857521. This component provides the reflective surface for the exterior door mirror, crucial for rearward visibility and safe driving. It is designed for the left side of the vehicle's front door mirror assembly. Made from high-quality glass, it measures approximately 0.22 meters in length. Using genuine OEM mirror glass ensures optical clarity, correct curvature, and proper heating element function (if equipped), which is vital for safety and performance in all weather conditions.