This is the info I think I got it on this forum I it saved in my email. It work for me on the second try. Good luck Win
Programing Instructions for Lexus Keyless Remote:
1. Start with key out of switch, drivers door open, all other doors and trunk closed, doors unlocked.
2. Insert key in ignition, DO NOT TURN ON, and remove key.
3. Using drivers side power door lock button, lock and unlock doors 5 times within 40 seconds, ending with doors unlocked.
4. Close drivers door and open it. Again lock and unlock doors 5 times within 40 seconds, ending with doors unlocked.
5. Insert key into ignition and turn from LOCK to ON to LOCK one time. Remove key from ignition.
6. Door locks will cycle one time.
7. Press lock button on transmitter for at least one second. Door locks will cycle.
10. Within 20 seconds, close drivers door and open it and press button on transmtter again for at least one second.
11. Door locks will cycle. Wait 20 seconds and registration will be completed.
**if it does not work, start over from beginning, it may take several attempts. If it does not work, contact your local dealer.