2010 m35 149k...I hear a strange noise whenever i start the car, first start of the day or when I get off work. It's not a squealing sound and it also sounds like your listening to a formula 1 car on low volume. Turned off the ac and I can still hear the noise. But after maybe 5 mins into driving it stops. Any thoughts? Belts? Pulleys? Bought the car used I think back in 2019 and I haven't really had to do any major work to it.