Why is my Audi A3 engine making a grinding noise?

I have recently noticed that my Audi A3's engine has started making a strange grinding noise at low speeds. What could be causing this and how can I address it?

The most common cause of grinding noise in an Audi A3's engine is worn out bearings. These bearings can become damaged over time due to normal wear and tear or lack of proper maintenance. It is important to have a mechanic inspect and replace these bearings as soon as possible to avoid further damage to other engine components.

Another possible reason for the grinding noise could be a faulty transmission. If you have noticed any unusual shifting or slipping of gears, it is important to have your transmission inspected and repaired by a professional mechanic.