Genuine OEM Audi Radiator Coolant Hose, part number 5Q0122051BA. This hose is designed to carry coolant between the radiator and engine, playing a critical role in maintaining optimal engine operating temperature. It is positioned within the engine cooling system. Weighing 0.125 kg and measuring approximately 0.555 m in length, this hose is constructed from durable materials to withstand high temperatures and pressures. Choosing a genuine OEM hose ensures precise fitment, correct routing geometry, and resistance to coolant chemicals for long-term reliability.