Genuine OEM Audi Coolant Hose, part number 4G0121448AG. This essential component is responsible for transporting coolant throughout the engine cooling system, maintaining optimal operating temperatures and preventing overheating. It forms part of the intricate network of hoses connecting various cooling system components. Weighing 0.129 kg and measuring 0.225 m in length, this hose is constructed from durable materials designed to withstand high temperatures and pressures. Choosing a genuine OEM coolant hose ensures correct routing geometry, proper fitment, and resistance to coolant chemicals, critical for reliable engine cooling.