Why is the engine in my Audi making a strange noise?

I have recently noticed that the engine in my Audi is making a strange noise. It almost sounds like a rattle. What could be causing this and how can I fix it?

Hi Alexandra, the strange noise coming from your Audi's engine could be a sign of a problem with the timing belt. It's important to have this checked and replaced if necessary to prevent further damage to your engine.

Alexandra, it's possible that the noise is coming from a faulty water pump. This should be inspected and replaced if needed to avoid overheating your engine.

It could also be an issue with the exhaust system. Have a mechanic check for any leaks or cracks that could be causing the noise. It's important to address this as it can affect the performance and fuel efficiency of your Audi.