Genuine OEM Volkswagen Coolant Hose, part number 5C0121156. This hose is responsible for carrying coolant to and from the engine, playing a crucial role in regulating its temperature. It is located at position 5 on the diagram, connecting various parts of the cooling system. Made from high-quality, durable materials, it is designed to withstand the demanding conditions of the engine bay. Genuine OEM coolant hoses ensure precise fitment and long-lasting performance, essential for preventing engine overheating and maintaining optimal operating conditions.