Hi,
I own a 2001 Lexus RX300 and my passenger window won't open all the way. Anyone have any idea of what could be wrong?

 

My window is quite similar, but a different situation. Sometimes my window works fine, but sometimes when I want to close it; it stalls and goes up and down.

 

check out this thread. I had a similar problem.
https://www.clublexus.com/forums/sho...d.php?t=268620
in my case the rubber guide rails was causing too much friction and it tripped the overload on the motor, causing it to go down when i clicked it up and causing erratic opening as well.

I had to follow up the armor all with a dry spray lubricant. After that the window slides up and down smoothly.