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Any battery voltage drop for a short period of time can cause that issue, and the microsoft reboot is the right approach. On an old car, you'd look square at the ground straps, but on a new one, it could be a loose connection at any one of a myriad of points. Are they going to replace your ECU under warranty?
On a related note, I swear I stumbled across something similar on this site, but can't recall if it was g01 or g80. If I find it, I'll link it.
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2007 X3
2022 M3 Base
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