Fast instructions (10-15 minutes to swap locking mechanism or 20-25 minutes to install $15 alternative)
You need: two flat screwdrivers, short philips, torx30, 10mm. (drill and soldering iron to install alternative)
1. Remove door panel http://www.clublexus.com/forums/showthread.php?t=288373
2. Make sure that glass is up.
3. Remove 4 torx30 screws (three on the side and one inside) that hold locking mechanism
4. Unlatch small plastic clip (red circles on picture #1 from the post #73)
5. Remove one 10mm bolt (under “inside” torx bolt) that holds vertical glass rail (yellow circle picture #1 from the post #73)
6. Look up, toward external door handle through large opening in the door from inside. You should see to rods attached with plastic clips to the door handle. Undo it. (picture #6 from the post #73)
Locking mechanism is ready to come out.
You should be ready to understand what is on the pictures in the post #4 now.