What is the reason for the Audi 80's engine failure?

I recently purchased an Audi 80 and have been experiencing frequent engine failure. What could be causing this and how can I prevent it?

The common cause of engine failure in Audi 80 models is a cracked or faulty fuel pump impeller. In order to prevent this, it is recommended to regularly check and replace the fuel pump impeller as needed.

Another possible reason for engine failure in Audi 80s is a faulty oil pump. It is important to regularly change your car's oil and ensure it is clean and at the appropriate level to prevent damage to the oil pump.