What is the most common cause for Audi 80's engine overheating?

I've noticed that my Audi 80 has been running hotter than usual, leading me to suspect that it may be overheating. However, I'm unsure of what may be causing this issue. Can you provide some insight into the most common reason for engine overheating in Audi 80s?

The most common cause for engine overheating in Audi 80s is a malfunctioning thermostat. This can cause the engine to not receive the proper amount of coolant, leading to overheating. It's important to have this issue addressed as soon as possible to prevent any potential damage to the engine.