Genuine OEM Audi Engine Coolant Hose, part number 4K0122158. This essential hose connects various components within the engine cooling system, facilitating the efficient circulation of coolant to maintain optimal engine operating temperatures. It is designed with specific bends and connections to ensure proper routing and fitment within the engine bay. Constructed from high-quality, heat-resistant rubber, it withstands the high temperatures and pressures of the cooling system. Using a genuine OEM coolant hose ensures precise dimensions, correct material composition, and resistance to degradation, preventing leaks and maintaining the integrity of the cooling system.