[Beemw335]

My car has a annoying squeaking sound like a belt thats rubbing or something. It s usually only heard during morning starts on humid days so it makes sense the moisture would maybe make some squeaking, but now its doing it whenever the ac is on at a low level lol. This is weird and quite annoying. I cant hear it with the music on, but when I pop the hood i can hear it very loudly.
Anybody else experience this?

[JamesM3M5]

Sounds like a bad idler or tensioner pulley. How many miles on the car?

Or it could be this:

"What's that squeaking sound?"