Genuine OEM Audi Coolant Hose, part number 4M0122055DJ. This hose is crucial for transporting coolant between engine components and the radiator, maintaining optimal engine operating temperature. It is positioned as part of the lower radiator hose assembly. Constructed from durable, heat-resistant rubber, it measures approximately 0.257m in length. Choosing a genuine OEM hose ensures precise fitment, correct routing geometry, and resistance to thermal cycling and chemical degradation for long-term reliability.