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MCU1: Black center screen / mcu failure caused by a faulty navigation MicroSD card

That's great! Curious, did you pull the entire MCU out of the dash or do the HVAC duct hack? Is it bad to remove the MCU? I tried watching a few YT videos but most of them require removing both of the dash trim etc. I'm pretty handy but a bit intimidated with all those clips etc. and something breaking.
I did remove all of the dash trim to access the MCU, but it is not necessary to disconnect all of the cables. It will rotate forward enough to have clear access to the SD card slot. The best YT video to do this is from Electrified Garage -

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