Why does my Audi A3 make a whistling noise when accelerating?

I've noticed a whistling noise coming from my Audi A3 whenever I accelerate. It doesn't seem to affect the performance of the car, but it's quite loud and concerning. Any ideas on what could be causing it?

The most likely reason for this whistling noise is an issue with the turbocharger. The bearings may be worn out or there could be a leak in the system. I recommend taking your car to a certified Audi mechanic to have it checked out.