Recently I lost power to the radio & CD units (do not have nav). Designated fuses checked out OK. BMW tech found that the TCU/OBC fuse (don't know location??) tripped out and replaced with a slightly higher 10amp and power was restored - no problems since.

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2021 X3 M40i Glacier Silver
2016 X5 xDrive 35i Mineral Silver

Gone but not forgotten
2017 X4 M40i Black Metallic
1985 325e Cosmos Blue
2006 330i Monaco Blue
2006 X5 Ti Ag
2000 528i Ti Ag
1986 535is Black (great ride)
1985 528e Polaris Silver (GTA in NYC)