Genuine OEM Volkswagen Coolant Hose, part number 06K121075BB. This hose is part of the engine cooling system, responsible for carrying coolant between engine components and the radiator. It is located in the engine bay, connecting various parts of the cooling circuit. Made from durable rubber and plastic to withstand high temperatures and pressures. Genuine OEM ensures exact fit and reliable performance, crucial for preventing leaks and maintaining optimal engine temperature.