Genuine OEM Audi Engine Coolant Hose, part number 4H0121448N. This hose is engineered to reliably transport engine coolant to and from various engine components, playing a crucial role in maintaining optimal engine operating temperatures. It is positioned on the rear left side of the engine bay. Weighing 0.065 kg, this genuine OEM hose is manufactured with specific routing geometry and material resistance to withstand high temperatures and pressures, preventing leaks and ensuring efficient cooling system performance.