Genuine OEM Audi Coolant Hose, part number 4L0121056. This hose is an essential component of the engine cooling system, responsible for transporting coolant to various parts of the engine. It is integrated within the complex network of cooling lines. Weighing 0.109 kg and measuring 0.17 m in length, this hose is designed for a precise fit and long-term reliability. Choosing a genuine OEM coolant hose ensures it meets strict quality standards for material strength, heat resistance, and connection integrity, which is vital for preventing system failures and costly engine damage.