Genuine OEM Volkswagen Final Drive Gearbox, part number 0CP409053AC. This component is responsible for transmitting rotational power from the transmission to the drive axles, enabling the wheels to rotate. It is identified as part 1 in the diagram. The gearbox is engineered for durability and precise power delivery. Genuine OEM final drive gearboxes ensure correct gear ratios and smooth operation, crucial for drivetrain performance and longevity.