Genuine OEM Audi Coolant Hose, part number 3C0121156BF. This essential component is designed to carry coolant between various engine components, playing a critical role in maintaining the engine's optimal operating temperature. Weighing 0.2335 kg, this hose is engineered for precise routing and resistance to high temperatures and pressures. Using a genuine OEM coolant hose ensures proper fitment, leak-free operation, and long-term durability within the engine cooling system.