My 2010 X5M spontaneously combusted just before Christmas, had 90000km in perfect condition, AA tuned..I was gutted. BMW recalled many vehicles for bad PCV heaters and heater modules, mine was one of them but it still caught fire.
Fortunately I found a 2012 with only 45000km that is like brand new, had to buy another AA tune but they gave me a courtesy discount.
Apparently it is a known issue with certain years of X5's but BMW are in denial.
https://photos.google.com/u/1/photo/...QJGRKp8B5eYFum
https://photos.google.com/u/1/photo/...QsP_9MIGbbOqwm
Inside of my tool shed was completely gutted too, $35K just in contents
