Having spoken to the sellers of scangauge and maxitrip, both said their units probably wouldnt work, I decided to give Kiwi MPG a try. Again spoke to the Australian distributers, said it worked on all post 1996 cars! To be honest this is the same info as the other two products, only difference was they said it would deffinatly work. Anyway ordered it on Monday from over east, it arrived today, not bad delivery time. Plugged it in and bingo worked a treat, no issues what so ever. You have to wonder if the other two units use a different obd2 protocol? So there we have it the Landcruiser 100 gxl UZJ100R does have a fully functional obd2 which will work with aftermarket trip computers, well the KIWI MPG.