What causes my Audi A3 to make a whistling noise while accelerating?

I've noticed a high-pitched whistling sound coming from my Audi A3 while accelerating. What could be causing this and how can I fix it?

The most common cause of a whistling noise while accelerating in an Audi A3 is a damaged or loose air intake hose. Check for any tears or looseness and replace the hose if necessary.

Another possible cause is a faulty turbocharger. Check for any leaks or damage and have a mechanic inspect it if needed.

A dirty air filter can also cause a whistling noise. Check and replace the air filter if needed.