Three faults related to steering...either your steering angle sensor needs to be recalibrated or replaced. Not sure what the cluster has to do with brake balance. Are the brake balance and transfer case faults active?

Your calipers on the rear are smaller, and so are the discs, so the gap will be larger back there. Same rear brake diameter as the non-iS X5's, so you could put 17's back there if you wanted. Note the location of the part of the wheel that is closest to the caliper on front, and then ask the tire shop to install the weights outside that area if possible. you could always do a single stick/tape weight instead of two. Won't be perfect, but you might not really notice with the snow tires anyway.

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Olympic Peninsula, WA, USA
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2005 Mini Cooper 100k, British Racing Green/Silver-Black
04/2002 4.6is 140k, Silver/Black-Alcantara *FOR SALE*
1989 325iX 270k, Diamond Black/Black
1984 318i 370k *SOLD* (First Bimmer)
Honorable Mentions: '71 2002, '87 325, '90 325ic, '92 525it, '93 325i, '94 530i