OK, so with the 132 wheels, it appears that the 15 is the small wheel and the 13 is the large. I now have the two smaller wheels on the left and the tires at the correct corners.

I guess at this time, all I can do is hope cross my fingers and hope that my transfer case is not screwed. It seems not to be at this time and the tires all measure out close to each other using crude measures.

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2006 X5 Sport 4.4i