Genuine OEM Volkswagen Alternator, part number 03L903023L. This unit is responsible for generating electrical current to power the vehicle's systems and maintain battery charge while the engine is running. It is typically mounted on the engine block and driven by the serpentine belt. Constructed with high-quality materials for durability and consistent performance. Genuine OEM alternators are precisely calibrated to meet the vehicle's electrical demands, ensuring reliable power delivery and system stability.