Genuine OEM Volkswagen Alternator, part number 04L903023NX. This component converts mechanical energy from the engine into electrical energy to charge the battery and power vehicle systems. It is located at position 2 in the diagram. This alternator weighs 8.089 kg and has dimensions of 0.165m x 0.155m x 0.172m. Genuine OEM alternators ensure precise voltage regulation and long-term reliability, crucial for protecting sensitive electronics.