Genuine OEM Volkswagen Alternator V-Belt, part number 04L145933A. This multi-ribbed belt is responsible for transmitting power from the engine's crankshaft to the alternator, which generates electricity for the vehicle's electrical systems and battery charging. It is a critical component in the engine's accessory drive system. Weighing approximately 0.064 kg, this durable belt ensures efficient power transfer. Choosing a genuine OEM V-belt guarantees the correct material composition, precise rib profile, and tensioning characteristics for reliable, long-lasting performance and reduced noise.