Genuine OEM Audi Coolant Pipe, part number 4K1121071D. This metal pipe is a vital component of the engine cooling system, responsible for transporting coolant to maintain optimal engine operating temperatures. It is located within the engine bay, connecting various cooling system components. Weighs 0.123 kg and measures 0.46 m in length. Choosing genuine OEM ensures precise routing geometry and material resistance to high temperatures and pressures, preventing leaks and system failures.