[yetieater]

Potentially? I'm not sure how the ambient air temperature reading influences the operation of the A/C, but you could start by replacing that sensor or at least checking it for connection. I know there is one on the passenger side, under the front bumper.

 

[yetieater]

Here's something that is potentially worth examining.

http://www.realoem.com/bmw/showparts.do?model=EV53&mospid=47725&btnr=65_0489&hg=65&fg=70