Genuine OEM Audi Engine V-Ribbed Belt, part number 05L903159. This essential belt is responsible for transferring power from the engine's crankshaft to various accessories such as the alternator, power steering pump, and air conditioning compressor. It ensures these components operate correctly. Made from durable, high-strength rubber compounds, it resists stretching and wear under high loads and temperatures. Genuine OEM belts provide precise length, rib count, and material composition, crucial for maintaining proper tension, preventing slippage, and ensuring the reliable operation of engine accessories.