Genuine OEM Audi Expansion Tank Coolant Hose, part number 7L6122447BE. This vital hose forms a critical link in the engine cooling system, connecting the coolant expansion tank to the main cooling circuit. It facilitates the proper flow of coolant and helps manage system pressure and volume changes. Measuring approximately 0.65 meters in length and weighing 0.191 kg, this hose is engineered from durable, heat-resistant materials. Choosing a genuine OEM expansion tank coolant hose ensures the correct routing, flexibility, and resistance to thermal cycling required for reliable and leak-free cooling system operation.