Genuine OEM Volkswagen Timing Chain Guide Rail, part number 057109538C. This rail is an essential component within the engine's timing mechanism, designed to guide and tension the timing chain, ensuring precise valve timing and efficient engine operation. It is located within the timing chain assembly, providing a smooth path for the chain's movement. Weighing approximately 0.0416 kg, it measures 0.142m x 0.045m x 0.015m. Opting for a genuine OEM timing chain guide rail ensures the correct material composition and dimensional accuracy, critical for minimizing wear, reducing noise, and maintaining the engine's long-term reliability.