Genuine OEM Audi Alternator V-Belt Pulley, part number 079903119C. This essential component is mounted on the alternator shaft and is driven by the engine's serpentine belt, transferring rotational energy to generate electrical power. It features multiple ribs to ensure optimal grip and efficient power transmission. Weighing approximately 0.42 kg, this pulley is precision-machined from durable metal. Choosing a genuine OEM alternator pulley ensures correct dimensions, material strength, and precise balance, which are critical for smooth belt operation and the longevity of the alternator and other accessory components.