Genuine OEM Audi Generator Poly V-Pulley, part number 06B903119D. This crucial component is responsible for transferring rotational power from the engine's accessory drive belt to the generator (alternator), enabling it to produce electrical power for the vehicle's systems and battery charging. Manufactured in Germany, this pulley weighs approximately 0.47 kg and features a multi-ribbed design for optimal belt grip. Choosing a genuine OEM pulley ensures precise dimensions, correct bearing tolerances, and durable materials, which are essential for smooth, quiet operation and the long-term reliability of the charging system.