Genuine OEM Audi Coolant Hose With Coupling, part number 2Q0121049AL. This multi-branch hose is designed to connect various components within the engine cooling system, facilitating the circulation of coolant to maintain optimal engine temperature. It is located in the engine bay, forming critical connections between the radiator and other cooling system parts. Constructed from reinforced vulcanised rubber, this hose assembly weighs approximately 1.14 kg. Using a genuine OEM coolant hose ensures the correct material strength, resistance to heat and pressure, and precise routing geometry with integrated couplings for a secure, leak-free connection and reliable cooling performance.