Genuine OEM Volkswagen Engine Control Chain Tensioner, part number 06A115130B. This vital component is responsible for maintaining the correct tension on the engine's timing chain, which is crucial for precise valve timing and overall engine performance. It ensures the chain operates smoothly and prevents slack that could lead to timing issues or engine damage. Crafted from durable plastic and metal, this tensioner is designed for long-lasting reliability. Choosing a genuine OEM tensioner guarantees factory-specified tolerances and material quality, essential for the critical function of the engine's timing system and preventing premature wear.