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      01-24-2013, 02:23 PM   #19
Bill B.
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Drives: '12 135i, '13 X135i '15 S1000R
Join Date: Sep 2011
Location: Cary, NC

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I'll add another datapoint to this discussion. Sometimes the AC performance can decline very slowly and might not be very noticeable. If you have access to a thermometer, check each side of the vents with the AC on high. If there is any more than a slight difference in values between the two sides, you probably have low refrigerant/leaking evaporator. The leak will cause a bad odor.

Last edited by Bill B.; 01-24-2013 at 08:15 PM.