What are some common problems with the Audi A2 engine and how can they be solved?

I recently purchased a used Audi A2 and have noticed some issues with the engine. It seems to be making strange noises and there is a decrease in performance. What could be causing these problems and what steps should I take to fix them?

One common issue with the Audi A2 engine is the cam chain tensioner failing. This can cause the engine to make loud rattling noises. The best solution is to replace the faulty tensioner with a new one. Additionally, getting regular oil changes and choosing a high-quality oil can also help prevent this problem.