Genuine OEM Audi Flexible Coolant Hose, part number 4F0121107AH. This hose is a vital part of the engine cooling system, facilitating coolant circulation between engine components and the radiator. It is located in the engine cooling assembly. Constructed from robust rubber and reinforced materials for extended service life and resistance to heat and pressure. Genuine OEM hoses are manufactured to exact tolerances for a perfect fit and reliable coolant flow, essential for maintaining engine temperature.