Genuine OEM Volkswagen Rear Axle Differential, part number 0BA525021K. This critical component allows the wheels on the same axle to rotate at different speeds, which is essential for smooth turning and maintaining traction. It is positioned in the rear axle assembly. Weighing 19.425 kg, this robust assembly is built for durability. Choosing a genuine OEM differential ensures factory-calibrated tolerances and material strength, providing optimal performance and a long service life for the drivetrain.