Genuine OEM Audi Coolant Hose, part number 420819372. This hose is designed to transport coolant efficiently within the engine cooling system, maintaining optimal engine temperature. It is a critical component for the circulation of coolant. Measuring approximately 0.167m in length, this hose ensures a precise fit and reliable performance. Genuine OEM hoses are engineered for correct routing geometry and resistance to engine fluids, preventing leaks and premature wear.