Genuine OEM Audi Engine Coolant Hose, part number 4L0121444. This small but crucial hose is part of the engine cooling system, responsible for transporting coolant between components to maintain optimal engine operating temperatures. It connects two pipes within the cooling circuit. Weighing 0.0995 kg and measuring 0.145 meters in length, this hose is manufactured from high-quality, heat-resistant rubber. Choosing a genuine OEM coolant hose ensures the correct material properties, precise dimensions, and secure connections, which are essential for preventing leaks and maintaining the integrity of the cooling system under demanding conditions.