Genuine OEM Audi Coolant Hose with Quick Release Coupling, part number 1K0122157KB. This pre-formed rubber hose is designed to carry engine coolant within the cooling system, ensuring proper temperature regulation. It features a quick-release coupling on one end for efficient and secure connection to other cooling system components. Choosing a genuine OEM coolant hose guarantees the correct routing geometry, material resistance to heat and coolant chemicals, and reliable sealing, which are essential for preventing leaks and maintaining engine health.