Believe it or not the Countryman is wider than the X1, so that is why I think the bike rack may fit a X5? The mounting bracket on the Mini rack is approx 44" wide. The mounting holes in the X1 bumper are approx 34" apart (center to centre). I'd appreciate it if someone with a current model X5 could measure the distance between the two mounting points on their back bumper. Measure from center of hole cover to center of hole cover. Thanks.
As for why she got rid of the Mini it was just time. We tend to deal our cars every two years or sooner. She liked the Countryman (S all4 with JCW body kit, 6 spd) but missed driving a BMW. She has had the X1 for about a week and a half and loves it.