Genuine OEM Volkswagen Poly V-Belt Pulley, part number 028903119S. This pulley is a component of the alternator assembly and is responsible for driving the V-belt. It is designed to ensure efficient power transfer from the engine to the alternator. The pulley's precise dimensions and bearing quality are critical for vibration-free operation and extended service life. Genuine OEM parts guarantee the exact fit and performance required for the charging system.