Genuine OEM Audi Alternator Poly V-Belt Pulley, part number 022903119D. This pulley is a key component that drives the alternator using the engine's poly V-belt, converting mechanical energy into electrical power for the vehicle's systems. It is mounted directly onto the alternator shaft. Weighing 0.511 kg, this pulley is precision-machined for smooth operation and durability. Using a genuine OEM pulley ensures correct belt alignment, reduces vibration, and provides reliable power generation, preventing premature wear on the alternator and belt system.