Help me identify this noise!

Anaiskhach

New member
 Los Angeles CA
BMW z4 e89 2015 28i
Around 80k miles

The noise sounds like a light whirring / whooshing when pressing on the gas

It is heard inside the cabin and is harder to hear with open windows or I’m pretty sure it gets drowned out with higher speeds as well

Usually heard from 0-20mph

Recently had issues with serpentine belt and battery (everything now replaced with new)

In the second clip the car is being revved to just below 2k rpm where the noise is usually heard most in the cabin.
Ignore engine light, its for oil pressure sensor
 
Rarely have aircon on in my car in the UK (3 times this week!) but it's quite noisy and changes with revs.
Just a thought, but video sounds like an rattle, exhaust heat shield loose?
 
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