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I have a 2015 IS250 w/ Navigation. The Navigation Micro SD card was missing when I bought the car. My mom has a 2016 ES350 w/ Navigation. I put her Navigation's Micro SD card in (Identification 86271-78012) and it does not work.
I THINK that new cards are generic, then when they are installed, they get "paired" up with the nav system and something gets written to the card to indicate the serial number of the nav unit it was first used on.