Genuine OEM Volkswagen Differential Housing, part number 0A5409021H. This housing encloses the differential gears, which are essential for transferring engine power to the drive wheels and allowing them to rotate at different speeds during turns. It is located within the transmission assembly. Constructed from robust cast metal for maximum durability and resistance to wear. Genuine OEM parts are manufactured to exact specifications, ensuring proper alignment and function within the drivetrain for a smooth and reliable driving experience.