Why does my Audi A1 make a loud rattling noise when I accelerate?

I recently noticed that my Audi A1 makes a loud rattling noise when I accelerate, but only at certain speeds. What could be causing this and how can I fix it?

The most likely cause of this rattling noise is a loose exhaust heat shield. It's a common issue in Audi A1s and can usually be fixed by tightening or replacing the heat shield. I recommend taking it to a certified mechanic for proper diagnosis and repair.

Another possible cause could be a worn out or damaged engine mount. This can cause abnormal vibrations and noises when accelerating. Have a mechanic inspect your engine mounts and replace them if necessary.

It could also be a problem with the timing chain. This is a complex issue and requires specialized knowledge to diagnose and fix. I suggest taking your car to an Audi dealership for proper inspection and repair.