Genuine OEM Audi Coolant Hose, part number 4H0121449Q. This hose is a critical part of the engine's cooling system, responsible for circulating coolant between various engine components. It is specifically positioned at the rear right of the cooling system. Weighing 0.185 kg and measuring 0.34 m in length, this hose assembly is engineered for precise fit and optimal flow. Choosing a genuine OEM coolant hose ensures it meets rigorous standards for material quality, flexibility, and resistance to thermal cycling, which is crucial for preventing leaks and maintaining efficient engine cooling.