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      01-08-2018, 10:17 AM   #5
SteveInfante
NewFinishColumbia/detailer
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Drives: 2015 F31 xDrive
Join Date: Sep 2010
Location: Columbia, SC

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I just had a whistle sound this morning. It's was just as you described. It happened to be 22 degrees out as well. I popped the sunroof open and it stopped. I'm thinking that the seal gets deformed somehow when it gets that cold.
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