What is the most common issue in the Audi A5's engine?

I have been hearing strange noises coming from my Audi A5's engine. What could be causing this and how can I fix it?

The most common issue in the Audi A5's engine is the failure of the oil pump. This can cause engine noise and eventually lead to engine failure if not addressed.

Another common issue is the failure of the timing chain tensioner. This can also cause strange noises in the engine and is a costly repair if not caught early.