Genuine OEM Audi Flexible Tube, part number 427131386F. This flexible tube is a component of the engine cooling system, likely carrying coolant between various parts of the system. Its flexible construction allows for installation in tight spaces and absorbs engine vibrations. Made from heat-resistant rubber, it is designed for long-term performance. Genuine OEM parts are vital for engine cooling hoses to ensure correct diameter, material strength, and resistance to coolant and high temperatures.