With my windows up I can hardly hear my turbo, but when they're down that's all I can hear. This car makes a lot of turbo noise. I do however hear my heater fan whine while I drive around. I just turn my radio up louder.
Try driving around with your climate control completely off, if the whine goes away, viola!
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2011 E91
2016 M2 - Sold
2014 X1 - Sold
2002 Land Rover Discovery II - 3" lift & 33s
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