Thanks to everyone for this thread. I brought my 2010 Z4 30i in and complained about the stalling in sport mode at 80 degrees F. They did a software update and it seems to have fixed this issue. It also seems to have updated the Nav software load as well. Not sure if related. But in the process, it does wipe out any messages sent to the car (e.g. from Google Maps), and wipes recent destinations. Also programming of the radio smart buttons was lost. Dealer was Stevens Creek BMW in Santa Clara CA. Cost $0.
Mike
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