Genuine OEM Audi Drive Belt Tensioner Damper, part number 077903133F. This critical component maintains proper tension on the engine's accessory drive belt, ensuring reliable operation of connected systems like the alternator, power steering pump, and air conditioning compressor. It is installed within the engine's belt drive system. Weighing approximately 0.96 kg, this tensioner damper is constructed from durable metals for long-term reliability. Choosing a genuine OEM tensioner ensures precise spring calibration and damping characteristics, preventing belt slippage, excessive vibration, and premature wear of both the belt and associated pulleys.