Genuine OEM Audi Coolant Hose, part number 5QN122063. This essential hose is designed to carry coolant between various engine components, playing a critical role in maintaining optimal engine operating temperatures and preventing overheating. It connects the oil cooler to another part of the cooling system. The hose measures approximately 0.3 meters in length and weighs 0.131 kg. Choosing a genuine OEM coolant hose ensures the correct material composition, precise routing geometry, and resistance to temperature and pressure fluctuations for long-term reliability.