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Exhaust flapper valve?
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02-14-2015, 02:34 PM
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RDKing2
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Drives: 2015 M235i, 2004 M3
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Pretty sure it stays open in sport/sport+. Closed in comfort but will open when you get on it. Closed in eco as well. Seems like even in eco if you really mash the pedal it will open.
Appreciate
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