What is the cause of a noisy engine in the Audi A3?

My Audi A3's engine has been making a loud noise when I accelerate. It's becoming quite annoying. What could be the cause of this and how can I fix it?

One possible cause of a noisy engine in the Audi A3 could be worn out or loose parts. It's important to regularly check and replace any faulty parts to prevent further damage.

Another possible cause could be low oil levels or dirty oil. Make sure to keep up with regular oil changes and use high-quality oil to avoid any engine issues.