Why does my BMW M4 make a strange noise when I turn on the AC?

I recently noticed that my BMW M4 makes a strange noise when I turn on the AC. It sounds like a whirring or grinding noise. What could be causing this and how can I fix it?

There could be a few reasons for this noise. The first thing to check would be the AC compressor. It may be worn out or damaged, causing it to make a strange noise. Another possibility could be a loose or damaged belt that is connected to the AC system. If this is the case, the belt will need to be replaced. You may also want to have a mechanic check for any loose or damaged components in the AC system.