What are common causes of engine failure in an Audi 80?

I have a 2005 Audi 80 and I've noticed it's been having frequent engine issues. What are some common reasons for engine failure in this model?

One common cause of engine failure is not regularly changing the oil, which can lead to a buildup of sludge and damaging engine components. Make sure to follow the recommended oil change schedule in your owner's manual.

Another potential cause of engine failure is a faulty timing belt. It's important to have your timing belt replaced according to manufacturer guidelines to prevent it from breaking and causing serious damage to your engine.