Try entering this in Google: overinflated tire explosion (Sorry Ray, couldn't resist)

BMR: Do the Google search, and you will find this link, among others: http://www.4x4now.com/sf1296.htm
Look halfway down the article. Then go back to 32-39 psi.

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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