To your point, my high maintenance costs on my X bought at 79k miles have something to do with catching up on maintenance that might have been deferred by prior owner (or maybe the reason they dumped it). Whatever the case I keep it b/c nothing else meets my needs as well as this complex machine does. But my M5 was, and my x3 is, comparatively bulletproof compared to the E53. This board continues to be a great X5 grief counselor.

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2016 GMC Sierra 2500 HD All-Terrain, Duramax 6.6

2011 X5M Alpine White/Sakhir Orange, Eucalyptus, Spare tire!, Comfort, Soft Close, Tech, Rear Climate, Individual dash, Individual Audio, HUD, DVD, USB, Cold.

Gone:
2008 4.8i
2005 X5 4.8is
2004 X5 4.4i Sport
2004 X3 3.0i 6MT
2002 M5