Genuine OEM Audi Coolant Hose with Coupling, part number 5Q0122157DK. This hose is a critical component of the engine cooling system, responsible for transporting coolant between various engine components to regulate temperature. It features an integrated coupling for a secure and leak-free connection within the cooling circuit. Made from heat-resistant rubber, this hose measures approximately 0.4 meters in length and weighs 0.165 kg. Choosing a genuine OEM coolant hose ensures correct routing geometry, material compatibility with engine fluids, and reliable performance under high temperatures and pressures, preventing leaks and overheating.