I have this same issue on the 2018 SL450 I just bought from a non-Supra dealer. I had read on a different forum that the fix is a simple upload of an update patch that can be done with a file loaded on a USB Flash drive. My boat is already in the water and it would seem ridiculous to waste a day to pull it out and drive it to a dealer and pay them $200 for such a simple fix that I could do.

Has anyone on here been provided the link to download the fix?

Sincicely,

Excite dto own a Supra.