Why is my Audi A4's engine making a strange whirring noise?

I have a 2016 Audi A4 and recently I've noticed a strange whirring noise coming from the engine. It seems to happen when the car is idling and gets louder when I accelerate. What could be causing this and should I be concerned?

It's likely that the whirring noise is coming from a worn or damaged belt in your engine's accessory drive. I recommend taking your car to a mechanic to have them check and possibly replace the belt.

Another possibility is that there is an issue with the pulleys or tensioner in your engine's accessory drive. These can also wear out and cause unusual noises. I suggest having a mechanic take a look and replace any faulty parts.

If you've recently had any work done on your car, it's possible that a part was not properly installed or tightened and is now causing the whirring noise. Take your car back to the mechanic who worked on it and have them check for any mistakes.