Discovered that a DISA valve can last 267,190 miles and its failure causes misfires in cylinder #1 and #6. Wasn't such a bad thing after the X5 ran like a top on a 450 mile trip yesterday delivering 22.4 mpg at an average 72 MPH though. And as a bonus, my friendly neighborhood dealer discovered a split outer CV boot! (Trouble is, my bonus becomes his bonus)

2002 X5 3.0 267,200 miles
2004 325i 116,800 miles