Genuine OEM Audi Coolant Pipe, part number 3D0121065FJ. This pipe transports engine coolant between various engine components, playing a vital role in maintaining optimal engine operating temperature. Positioned in the lower cooling circuit, it measures approximately 0.75 meters in length. Using a genuine OEM coolant pipe ensures precise fitment, correct material composition for heat and pressure resistance, and reliable, leak-free performance within the cooling system.