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      01-05-2013, 05:39 PM   #5
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Drives: 2007 335i Convertible
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Location: Detroit, MI

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Originally Posted by roundel335 View Post
It's the regulator that's part of the fan unit - it sits up under the dash behind the glovebox area. You can get a new one for about $160 from and it includes the regulator plus the fan assembly itself.
+1 I have the exact same issue and this is what I've read the issue is.. makes sense.
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