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      11-22-2012, 02:24 PM   #3
doug_999
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Drives: 2018 M3/2011 1M
Join Date: Mar 2008
Location: Chicago, IL

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I've got good news and bad news...

I have the same whistle in my 1M at exactly 2K (and a bit higher). It goes away once the car is warmed up. I do like the sound -but agree, it would be bad in the X5/X6. Since we have a different turbo setup, I suspect that it is not the wastegates (plus I would expect that noise under load if it was them). So I suspect it is something with the air intake. Does your sound go away after it is warmed up?
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2018 M3, Mineral White, 6 speed, ZCP, loaded sans CCB
2011 1M, Black loaded sans sat radio