Some Highlander Owners have had concerns about the rear hatch window will unlock or open when the vehicle is started. The repair for this is to replace the rear hatch window open switch on the rear hatch. Here are some Highlander Owners Discussing this concern. Toyota Highlander Rear Switch 84840-0E020 The rear hatch window switch is the culprit with this concern and it needs to be replaced. The first step will be to open the rear hatch and pull off the back panel. It is held on by quite a few white colored clips. You then need to disconnect a few electrical connectors and locate the five 10mm stud nuts and remove them. Don't forget about the two clips on either end of the rear panel plate. This is what it will look like when the plate with the switch is removed. Here is the rear hatch plate. Now just remove the old switch that is held in by one screw and a securing plate. We hope this helps you guys and look forward to hearing from you.