Why does my Audi A4 engine overheat during long drives?

I have noticed that during long drives, my Audi A4 engine tends to overheat. This usually happens after driving for 2-3 hours on the highway. What could be causing this issue and how can I prevent it?

One of the potential reasons for overheating could be a malfunctioning cooling system. If your coolant levels are low or there is a blockage in the system, it can cause the engine to overheat. I would recommend getting your cooling system checked by a certified technician.

Another reason could be a faulty thermostat. The thermostat is responsible for regulating the temperature of your engine. If it is stuck closed, it can cause the engine to overheat. I suggest getting your thermostat replaced if it is found to be faulty.