No, changing it isn't in the owner's manual. It involves a trip to the dealer for reprogramming. If you have the navigation system, there is a setting to change from miles to km but it only affects the trip distance in the NAV system, it doesn't change the primary odometer reading. Decide if you really want it changed, and if so have the dealer do it.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue