Genuine OEM Audi Serpentine Belt, part number 022145933AP. This multi-ribbed belt is a critical component of the engine's accessory drive system, transmitting power from the crankshaft to various accessories like the alternator, power steering pump, and air conditioning compressor. Made from durable rubber compounds, it weighs approximately 0.14 kg and measures 0.78 meters in length. Using a genuine OEM serpentine belt ensures optimal tension, proper accessory function, and long-term reliability, preventing premature wear and potential system failures.