Genuine OEM Audi Coolant Pipe, part number 059121399E. This essential component is part of the engine cooling system, designed to carry coolant between various engine components. It is positioned on the left side of the engine bay, following a specific routing path. Made from durable materials, this pipe ensures a leak-free connection and efficient coolant flow. Using genuine OEM coolant pipes guarantees precise fitment and material integrity, preventing leaks and maintaining optimal engine operating temperatures.