My '05 has proved pretty sound to date but only 11,500km.
Spade lug on one of the front brake lever popped off and shorted to ground which blew a 10amp fuse next to the battery. Took out the speedo and all lighting.
Battery terminal came loose also but I think a routine check of all electrical and mechanical fasteners (loctite the mechanical) is mandatory on these jackhammers.
'05 640 Adventure