Genuine OEM Volkswagen Poly V-Belt, part number 03L903137AB. This belt transmits power from the engine crankshaft to various accessory components like the alternator, power steering pump, and air conditioning compressor. It is an integral part of the engine's accessory drive system. Weighing 0.171 kg and measuring approximately 1613mm in length and 22mm in width. Choosing a genuine OEM belt ensures the correct tension, material composition, and rib profile for optimal performance and a long, vibration-free service life.