Genuine OEM Volkswagen Differential Housing, part number 0A6409021D. This housing encloses and protects the differential gears, which allow the drive wheels to rotate at different speeds when turning. It is a critical component for the drivetrain's functionality and durability. Constructed from robust metal, this differential housing ensures precise alignment of internal components and withstands operational stresses. Genuine OEM parts guarantee adherence to factory standards for optimal performance.