Genuine OEM Volkswagen Poly Ribbed V-Belt, part number 03L903137H. This belt is crucial for transmitting power from the engine's crankshaft to various accessories such as the alternator, power steering pump, and air conditioning compressor. It ensures all engine-driven components operate correctly. The belt is poly ribbed for enhanced grip and durability, with a length of approximately 675mm. Choosing a genuine OEM belt guarantees the correct tension, material composition, and precise dimensions for optimal engine accessory function and extended service life.