If it was just the mirror tilt I would say the position sensors inside the power mirror; they can fail and adjusting becomes erratic, to the point of not moving at all. The control module can also be a problem, since the tilt controls go through that module for mirror memory functions.

If the folding function is also not working, I would look to the wiring harness where goes from the door jamb to the door, as the wires can abrade. Also check the switch control panel in the door.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue