Genuine OEM Audi Radiator Upper Coolant Hose, part number 8K0122101G. This essential hose is responsible for transferring hot coolant from the engine to the radiator, playing a critical role in maintaining optimal engine operating temperatures. It connects the upper outlet of the engine to the upper inlet of the radiator. Constructed from durable, heat-resistant rubber, this hose weighs approximately 0.50 kg and measures 0.48 meters in length. Using a genuine OEM coolant hose ensures correct routing, precise fitment, and material integrity to withstand high temperatures and pressures, preventing leaks and ensuring reliable engine cooling.