Genuine OEM Audi Coolant Hose, part number 3D0121063AC. This hose is designed to carry engine coolant, playing a vital role in dissipating heat and maintaining optimal engine operating temperatures. It is located in the engine cooling system, connecting to the radiator. Made from durable, heat-resistant materials, it measures approximately 0.294m in length. Choosing a genuine OEM coolant hose ensures precise fitment, correct fluid resistance, and long-term durability for reliable engine cooling.