Genuine OEM Audi Coolant Hose, part number 1K0122101BP. This hose is a critical component of the engine cooling system, responsible for circulating coolant between various engine components and the radiator. Its function is to manage engine temperature, preventing overheating. Made from high-quality, heat-resistant rubber, it is designed to withstand high pressures and temperatures. Weighing 0.315 kg and measuring 0.44m in length, this genuine OEM hose ensures precise routing, correct diameter, and long-term resistance to degradation, crucial for maintaining engine health.