Genuine OEM Volkswagen Engine Coolant Pipe, part number 03N122157E. This complex pipe and hose assembly is a vital part of the engine cooling system, responsible for circulating coolant between various components like the engine block, radiator, and heater core to maintain optimal operating temperatures. It features specific routing and connection points to ensure proper flow. Constructed from durable rubber hoses and rigid pipes, it is designed to withstand high temperatures and pressures. Using a genuine OEM coolant pipe ensures correct routing, material integrity, and leak-free performance, preventing engine overheating and damage.