Genuine OEM Volkswagen Timing Belt Tensioner Pulley, part number 074109243E. This essential component is part of the engine's timing system, where it maintains the correct tension on the timing belt, ensuring precise valve timing and engine operation. Weighing 0.365 kg, this tensioner pulley is designed for smooth, reliable rotation. Choosing a genuine OEM tensioner pulley guarantees the correct spring tension, bearing quality, and material specifications for long-term reliability and prevention of timing belt slippage or failure.