Genuine OEM Audi Coolant Pipe, part number 4E0121400F. This pipe is a vital component of the engine cooling system, responsible for directing coolant flow to regulate engine temperature. It is integrated within the engine cooling assembly. With a length of approximately 0.42 meters, this pipe is engineered for precise routing. Opting for a genuine OEM coolant pipe ensures correct material composition, exact routing geometry, and leak-free performance essential for engine longevity.