Genuine OEM Audi Engine Coolant Hose, part number 5Q0121107B. This hose is a critical component in the engine cooling system, responsible for circulating coolant to maintain the engine's optimal operating temperature. It is positioned within the engine bay, connecting various cooling system components. Weighing 0.052 kg and measuring 0.11m in length, this hose is engineered for specific routing and pressure. Using genuine OEM hoses ensures proper fluid resistance, heat tolerance, and leak-free connections, crucial for reliable engine performance.