Why is the engine of my Audi A3 vibrating?

I've noticed that my Audi A3's engine has been vibrating a lot more than usual. What could be the cause of this and how can I fix it?

The vibrations could be caused by worn-out engine mounts. It's important to have them checked and replaced if necessary.

Another possible reason for the vibrations is a damaged propeller shaft. Have a mechanic inspect it and replace if necessary.

It's also possible that the engine is misfiring due to faulty spark plugs. Have them checked and replaced if needed.