Genuine OEM Audi Engine Coolant Hose, part number 06F121057D. This component is essential for carrying coolant to and from various engine components, ensuring the engine operates within its optimal temperature range. It is a curved black rubber hose, weighing 0.04 kg. Using genuine OEM coolant hoses guarantees resistance to high temperatures and pressures, correct routing geometry, and material compatibility with engine coolants, preventing leaks and maintaining system integrity.