Genuine OEM Audi Accessory Drive Belt Tensioner, part number 0P2260938C. This component is essential for maintaining the correct tension on the accessory drive belt, which powers various engine accessories. Proper tension prevents belt slippage, reduces noise, and extends the life of the belt and pulleys. Weighing 0.559 kg, this genuine OEM tensioner ensures precise spring calibration and durability for consistent belt performance and longevity of all belt-driven systems.