Genuine OEM Audi Engine Coolant Hose, part number 057121104A. This flexible hose is a critical part of the engine's cooling system, responsible for circulating coolant between various engine components to maintain optimal operating temperatures. It connects two pipes within the cooling circuit. Weighing 0.0235 kg, this hose is designed to withstand high temperatures and pressures. Genuine OEM coolant hoses provide precise routing geometry and material integrity, crucial for preventing leaks and ensuring reliable engine cooling.