Genuine OEM Audi Coolant Hose Set, part number 7N0121156AQ. This set of flexible hoses is a crucial part of the engine cooling system, responsible for transporting coolant between various components, potentially including a heat exchanger or auxiliary cooler. The hoses are specifically shaped and reinforced to withstand engine bay temperatures and pressures. Weighing 0.483 kg, this set is designed for precise routing and secure connections. Using genuine OEM coolant hoses ensures correct material composition, flexibility, and resistance to cracking or bursting, which is vital for preventing coolant leaks and maintaining engine health.