At 3500 miles, I finally tried my lumbar support button on the leather 8 way power seat option installed by SE Toyota. Worked great. Actually, too great, I adjusted it all the way out and thought one of my vertebrae was going to punch out of my lower intestine! So I reversed the support to flat. Then tried to adjust it again a little bit at a time. Nothing, Nada, no movement. Tried the switch back and forth, turning the engine on and off. No activity. Checked the manual, no separate fuse. (All the other power seat functions worked). During my chores today, it brought me near my dealer so I stopped. After 30 minutes or so, the Tech could not get the elect motor for the lumbar support to work. New seat back ordered. Should be fixed next week.