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      03-10-2022, 11:15 AM   #3
Edgarm8933
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Drives: BMW M240i
Join Date: May 2021
Location: Chicago

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Quote:
Originally Posted by jzeiler4 View Post
I have heard a low level whine in mine during hard acceleration when the widow is down (or top F23). It seems to come from the transfer case area. I think it is normal as it has been there from day one.
I'm not mechanically savvy but I've noticed it only happens when I put the car in sport mode. Comfort mode it's fine but when it's on sport mode it makes those pssss psss noises as I accelerate and downshift. It's kind of annoying. Just figured If I should take it to the dealer or if it's normal.
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