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Old 11-13-2011, 11:07 AM   #86
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Join Date: Mar 2009
Location: New Jersey
Posts: 125
My Ride: 2003 BMW 330i
Originally Posted by Nervous View Post
A sensor of dirty air that controls A/C air recirculation in 'A' mode (automatic). If your air recirculation button is in 'A' mode it decides where to get air for your A/C - either from outside (no recirculation) or from inside (recirculation).
I would have never have guessed that in a million years.
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