I believe that Toyota does advise against lift as it can mess with the TSS calibration. Personally with a 2018 with TSS and being lifted I have not seen any issues. Now I’m not at a 3” lift but I am at about 2” with 33” tires and have no issues..
I did however put a faux TRD Pro grill which lowers the TSS radar from the center of the grill to the bottom portion.
cocodataco im glad to you hear you don’t have any issues! It’s does help, I was considering that idea as well with the TRD Pro grille, since it’d be sorta right around the same spot where the regular Toyota sensor would be at if that makes any sense.lol