I am in Madison, WI, and it has been around zero a few times in the past week. My car has made a few funny noises during start up, and one time it said "Increased Battery Drain". But nothing really came of it or any other noises.
However, my Weisslicht LED turn signals frequently throw an error on both sides, but when I bump the signal, it'll blink really fast 4-5 times and then go to the regular cadence and reset the error. Oh well.
My wife's 328 ('07 E90 65k miles, spent all of it's life in Texas until Nov 2012) has some squeaking while turning the steering wheel and similar groans during start up.
Current: 2016 M3 | Mineral Grey on Black
Retired: 2010 E92 335xi, 2007 E90 328i, 2010 A4, 2003 E46 325xi