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Old 11-10-2008, 06:59 AM   #14
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Join Date: Mar 2007
Location: Maplewood, New Jersey
Posts: 1,176
My Ride: 2010 328xi
Air in the system generally tends to make things run hot, not cold. If you are having issues with the cabin temp, that could be related to the internal temperature sensor, not the engine temp. I had the "cool running" problem with the engine not wanting to come up to temp and a new thermostat solved it for me. Yours sounds like it may be a few different things. Good luck with the diagnosis.
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