Genuine OEM Audi Heater Coolant Hose, part number 1K0122447CN. This hose is a critical component in the vehicle's cooling system, responsible for circulating heated coolant to the cabin's heating core, providing warmth to the interior. It is part of the complex network of coolant lines within the engine bay. Constructed from durable, heat-resistant rubber, this hose weighs approximately 0.067 kg and measures 0.2 m in length. Choosing a genuine OEM coolant hose ensures precise routing geometry, correct material composition for coolant resistance, and reliable performance under varying temperature and pressure conditions.