My 2001 LS430 driver window started to get stuck in the down position from time to time. I would try it the next day and it would work. I thought it might be a bad switch so I replaced the switch with another used one that I bought but that also did not work. The used switch was $60 online. Here is a video on how to remove the switch:
https://youtu.be/HU0iVYoxyZY
I went to my local dealer. The service adviser reported that the problem was probably a bad window regulator or motor. I replace both the regulator and motor and now the window works just fine. I bought new parts online for about 200-300 dollars and did the work my self. Here is a video on removing the door panel which is the first step:
https://youtu.be/Bwm0Ub5ZgwI
Finally, here is my video on replacing the regulator and motor:
https://youtu.be/10rbGcXEF3E
I hope this helps someone.