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Here was the response from Forscan: Hello, FORScan recognizes vehicle by PCM strategy number. If you want FORScan work correctly with your new BCM, you need to remove vehicle profile after the replacement. More info: https://forscan.org/forum/viewtopic.php?f=5&t=9196 As for new options availability, please provide more details. If" PCM" is not a typo, maybe this is the problem. The PCM strategy may not be as up to date as the BCM. You don't need to update the vehicle profile if you connected to Forscan for the first time after the BCM update. Bottom line is we can't get dark mode to work on some vehicles. You guys can try contacting Forscan if you want to troubleshoot this. They would need specifics on your configuration, logs etc.. contact@forscan.org

One explanation why Forscan isn't working may be that Forscan determines which options and functions are available based on the VIN or model year. Updating a module won't turn on the new functions in Forscan. I have sent Forscan an email. Let's see if they respond. My TC has the BCM calibration that doesn't support dark mode so I can't test anything.

From the service manual on a 2016: