Genuine OEM Audi Coolant Hose, part number 4H0121092. This essential component is responsible for transporting coolant within the engine cooling system, facilitating heat exchange and maintaining optimal engine operating temperatures. It is located on the right side of the cooling assembly. Constructed from durable, heat-resistant rubber, this hose weighs approximately 0.02 kg. Opting for a genuine OEM coolant hose ensures precise routing geometry, correct material composition to withstand temperature and pressure fluctuations, and reliable leak-free performance, which is vital for preventing engine overheating.