Genuine OEM Audi Rear Axle Shaft, part number 0CV409809B. This vital drivetrain component is responsible for transmitting power and torque from the differential assembly to the vehicle's wheels. It is installed in the rear axle, connecting the differential to the wheel hub. Weighing approximately 1.071 kg, this shaft is engineered to withstand significant rotational forces and stresses. Choosing a genuine OEM axle shaft ensures precise spline engagement, correct material strength, and balanced rotation for smooth power delivery and long-term drivetrain reliability.