I got issues with my 2011 35i
Low battery warnings in very cold temps. I thought it was a bug, so I drove the car normally for a couple of days... until I was unable to start the car on a cold morning.
Got boosted by another car, bought a battery tender, and since then I plug the car when it gets under -20C or when I get the "low battery" message.
I did also had a PCM failure once, also in very cold temps. Got changed for a new unit, no problems since the replacement (about 2 years ago).
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