Genuine OEM Audi Alternator Poly V Belt Wheel, part number 03C903119D. This component guides the alternator's multi-ribbed belt, ensuring proper power generation and accessory drive. It is installed directly on the alternator shaft. Weighing 0.222 kg, this pulley is engineered for precise fitment and smooth operation. Choosing a genuine OEM pulley ensures factory tolerance for vibration-free service life and optimal belt tension.