The defroster on the vehicle does not work properly. When starting the car and the window is frosting, the drivers side of the front window defrosts normally but the right side does not defrost properly and it lags by 15-20 minutes. You cannot operate the vehicle safely with your entire passenger side frosted over. I reported this to Toyota as well as dealer and they are advising that it is working normally. I have pictures that show that the passenger side does not defrost properly, it was reproduced by the dealer, and Toyota's thermal imaging scan confirms lack of heat on the far side. However, Toyota is standing by that it is working as designed despite their testing showing it isn't working properly.

- Rancho Palos Verdes, CA, USA

My Toyota Grand Highlander develops severe interior window fogging and condensation, affecting the windshield, front side windows, and occasionally rear windows. This occurs during normal driving, especially in cool or humid conditions. The fogging appears rapidly, and the HVAC/defrost system often fails to clear the windows effectively, even when set to full defrost with outside air intake. Interior moisture buildup is excessive compared to other vehicles I-??ve owned, and the issue repeats regularly. This creates a significant visibility hazard, forcing me to adjust climate controls constantly while driving or pull over to clear the glass manually.

- Jasper, IN, USA