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2003 Lexus GX470 Remote Programming

Have all transmitters for the vehicle at hand

1. With the key out of the ignition, unlock and open drivers door (all other doors must be closed)
2. Within 5 seconds,
Insert the key into the ignition (Do NOT Turn it) and Pull key out.
Insert the key into the ignition (Do NOT Turn it) and Pull key out.

3. Within 40 seconds,
Close then open the drivers door.
Close then open the drivers door.
Insert the key into the ignition (Do NOT Turn it) and Pull key out.

4. Within 40 seconds.
Close then open the drivers door.
Close then open the drivers door.
Insert the key into ignition and leave it in the ignition.
Close the drivers door. Turn the ignition to ON then back to OFF (Do NOT Start or crank engine).
Remove the key from the ignition.

5. Within 3 seconds, the power door locks should lock then unlock automatically indicating successful entry into programming mode. Return to step 1 if the door locks do not cycle at this point or try the alternate procedure listed below.

6. Within 40 second,
A. Press the lock and unlock buttons on the remote simultaneously for 1.5 seconds.
B. Immediately after letting go of the lock and unlock buttons, press and release LOCK or UNLOCK button.
Within 10 seconds, the door locks should lock and then unlock once indicating successful programming.
(If the door locks cycle twice, repeat steps A and B in step 6 as the remote was not accepted)
Repeat steps A and B in step 6 for each new remote.

7. Open drivers door.