Genuine OEM Audi Coolant Pipe, part number 4E0121398F. This essential component is part of the engine cooling system, designed to transport coolant between various engine components and the radiator. Its rigid construction ensures a stable flow path for optimal thermal management. The pipe weighs approximately 0.62 kg and measures 37 cm in length. Choosing a genuine OEM coolant pipe guarantees the correct material composition, precise bends, and connection points for a leak-free and reliable cooling system operation.