Genuine OEM Audi Engine Serpentine Belt, part number 0P2903137A. This multi-ribbed belt is a crucial component of the engine's accessory drive system, responsible for transmitting power from the crankshaft to essential accessories such as the alternator, water pump, and air conditioning compressor. Made from high-quality, durable rubber compounds, it weighs approximately 0.11 kg and measures 0.37 meters in length. Using a genuine OEM serpentine belt ensures optimal performance, correct tension, and long-term reliability, preventing premature wear and potential system failures.