Yesterday, I got so fed up with the random electrical errors and broke down for a new battery. Despite everyone (3 places telling) me that the battery was fine I was still dead set on the original 8 year old battery on my 150K truck was the culprit.
I was getting/experiencing problems with climate control, I-drive, dash board, tail lamp, rear climate control, power window one touch, remote entry, welcome lights, clock resetting, and the sound system. It started getting worse about a week ago. I was sick of resetting the errors and having things randomly popup with no logical reason.
Battery install took maybe 20 minutes, and registering it took another 5.
Immediately after registering it and starting the truck which roared to life, I got the expected Active steering and 4x4 error. I recalibrated the steering (full turns left and right) the errors went away and cleared all the codes.
Put about 200 miles of mixed driving on it yesterday with mixed styles of driving. The truck felt amazing. My windows operated faster, the telescoping wheel was faster, the truck responded to my inputs accelerating with much greater response and transmission as well. I had my husband drive it and he remarked on how it didn't feel lethargic anymore.
Amazingly when I brought the battery back to Advance Auto ($192.00 with $20 core charge, 3 year replacement warranty) They said the original battery was bad. 11.5 was where it was sitting.
I ran a scan this morning minutes after getting to work today and ZERO codes.
Like everyone says on here, random electrical errors are most likely caused by a battery that is on its way out the door.
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2010 X5 3.0 X-drive Titanium Silver/Black
2018 Ford F-150 Platinum Crew
2010 528xi (His)
2017 M2 Manual (His)
Former Headaches:
2008 X5 RIP
2015 M235
2013 135is
2009 535xi Wagon (JUNK)

2007 530xi 6spd CPO Sport (Best Damn Car EVER)
2011 335xi M-sport Coupe 6spd (Sex on Wheels)
2010 550GT "CPO" (Junk)

2012 X5 35d "CPO" (More Junk)

2004 330i ZHP Sedan
2002 325xi Wagon
2000 323i Sedan
1998 M3 Sedan
1992 325i Sedan