Genuine OEM Audi Timing Chain Slide Rail, part number 03F109509F. This critical engine component is designed to guide and support the timing chain, maintaining proper tension and alignment for accurate valve timing. It is located within the engine's timing assembly. Weighing approximately 0.113 kg, this rail is made from durable materials to withstand continuous friction and heat. Using a genuine OEM slide rail ensures precise fitment and material integrity, crucial for the long-term reliability and performance of the engine's timing system.