My 2004 LS430 with 150,000 miles has had a broken side mirror assembly for some time. Its the only thing that doesn't work on the car... currently. I couldnt adjust the mirrors mechanically so i had to manually adjust them and I'm quite sure that I broke something because now the whole mirror assembly is floppy, but it was that or not being able to see other drivers.

I have been looking endlessly for a part number for the motors that are inside of the side mirrors. I am looking to take apart my side mirror and replace these motors as I cannot use any adjustment functions on the mirror. Yes, I did try cleaning the circuit board contacts for the switch.

I found a part number for the motors on the door actuator lock: "BN635624", but I don't know if that part number is the same for the side mirror motors. Even if it is, I couldn't find any direct replacements online.

 

You can't buy replacement rear view motors from lexus, they only sell the whole mirror.

 

My drivers side mirror on my 05 was knocked off when the wind opened the garage closet door as I backed out. Found a used part for $400 online and a local shop put it on for $100. You can find excellent quality used side mirrors on google or your favorite search engine. I don't know which side of yours is broken, but they're are available and for half of what I paid years ago. Good luck.

 

Our mirrors are one of the few weak links to LS430 ownership to an otherwise remarkably reliable car. Make sure if you pick up a used one you get a warranty that it fully functions and of course factor in that you will most likely need to have it painted as well as installed. Good luck.