Genuine OEM Volkswagen Differential Housing, part number 0A4409021AJ. This component is essential for the proper functioning of the transmission, housing the differential gears and allowing wheels to rotate at different speeds. It is located within the transmission assembly. Manufactured from durable materials to withstand the stresses of power delivery and ensure a long service life. Genuine OEM parts are vital for differential housings to maintain precise gear alignment and prevent premature wear.