Genuine OEM Volkswagen Engine Timing Chain Slide Rail, part number 059109510Q. This component is located within the engine's timing system, guiding and supporting the timing chain to ensure smooth and precise operation of the camshafts relative to the crankshaft. Constructed with a durable core and a low-friction sliding surface, it measures approximately 0.235 m in length. Using a genuine OEM slide rail is essential for maintaining correct chain tension and preventing premature wear, which can lead to catastrophic engine damage.