I just watched a video of a brake change on an E92 , although the calipers are different, seems may last brake job they used the old wear sensor which has now broken. So I will have to replace it, may just replace pads up front on both sides.
2013 X3 xDrive35i Titanium Silver
2009 135i CV Blue Water Metallic
2008 X5 4.8i, 2003 e46 330Ci