Genuine OEM Volkswagen Left Door Mirror Glass, part number 5H0857521D. This component provides the critical reflective surface for the exterior door mirror, enabling the driver to monitor traffic and surroundings on the left side of the vehicle. It is designed for precise fitment into the left door mirror housing. The glass offers clear, undistorted reflection, potentially featuring a split-view or aspherical section for enhanced field of vision. Using genuine OEM mirror glass ensures correct optical properties, heating element function (if equipped), and secure integration into the mirror assembly.