What is the transmission fluid for 07 highlander?

It would be Toyota type IV or WS fluid. Recommend you purchase from the Toyota dealer. The Toyota dealership parts store can tell you which one is for your model / powertrain. Type IV transmission fluid (possibly Mobil 3309 ATF) Mobil 3309 meets Type IV requirements. Not sure which company and type the WS ATF is. I would assume Mobil Oil as well, but is a different transmission fluid from Type IV.