Genuine OEM Audi Coolant Hose with Coupling, part number 3AA122157. This hose is designed to facilitate coolant flow within the engine cooling system, connecting various components to maintain optimal engine temperature. Measuring approximately 0.44 meters in length and weighing 0.215 kg, it features a quick connection for secure installation. Using a genuine OEM hose ensures precise fitment, correct routing, and material integrity for reliable, leak-free coolant circulation under varying engine conditions.