Genuine OEM Volkswagen Differential Housing, part number 0CF409021H. This housing encloses and protects the gears within the differential, allowing wheels to rotate at different speeds during turns. It is located within the transmission assembly. Constructed from durable cast iron, this housing is designed for precise fitment and robust performance. Genuine OEM parts are manufactured to exact specifications, ensuring the integrity and longevity of your vehicle's drivetrain.