What are some common issues with the Audi A2's engine and how can they be fixed?

I recently bought a used Audi A2 and noticed some unusual noises and a decrease in performance. I want to know what potential issues I should be looking out for and how I can address them.

The most common issue with the Audi A2's engine is a faulty timing chain and tensioner. If ignored, it could lead to serious damage and costly repairs. It's recommended to have it replaced every 60,000 miles or at the first sign of unusual noises. It's a relatively straightforward fix, but it's best to have it done by a certified mechanic.

Another issue to keep an eye out for is a failing mass airflow sensor. This can cause a decrease in performance and fuel efficiency. If your A2 is experiencing hesitation or stalling, it's worth checking the sensor and having it replaced if necessary. It's a relatively affordable fix and can save you from more expensive repairs down the line.

The coolant temperature sensor can also be a common culprit for engine issues in the Audi A2. A failing sensor can cause overheating and engine misfires. If you notice your engine running hot or rough, it's worth checking the sensor and replacing it if needed. This is a relatively inexpensive fix and can prevent more serious engine damage.