Genuine OEM Volkswagen Alternator, part number 03L903017EX. This vital component is responsible for generating electrical power to operate the vehicle's electrical systems and recharge the battery while the engine is running. It is mounted to the engine block. Featuring a durable housing and precision-engineered internal components, it ensures reliable performance. Genuine OEM alternators are manufactured to exact specifications for optimal efficiency and longevity, ensuring consistent power delivery.