Genuine OEM Audi Coolant Hose with Coupling, part number 1K0121156J. This branched hose connects various cooling system components, facilitating the transfer of coolant for effective thermal management. It features multiple branches and integrated couplings for secure and leak-free attachment. Weighing 0.403 kg, this hose is constructed from durable, heat-resistant rubber. Genuine OEM hoses are manufactured from specific rubber compounds to resist heat, pressure, and coolant chemicals, preventing leaks and ensuring the long-term reliability of the cooling system.