Genuine OEM Audi Coolant Hose with Coupling, part number 1EA121051R. This hose is a critical component of the engine cooling system, responsible for transporting hot coolant to the radiator for heat dissipation. It is positioned to connect directly to the radiator, forming part of the primary coolant circulation path. Constructed from durable, heat-resistant rubber, this hose measures approximately 0.673 meters in length and includes integrated couplings for a secure fit. Using a genuine OEM coolant hose ensures precise routing, correct diameter, and resistance to high temperatures and pressures, preventing leaks and maintaining cooling system integrity.