You can try this if this does not work it will need to be done by a mobile locksmith or dealer.Key Programming 1. Close all doors. 2. Insert an already programmed master key into the ignition. 3. Turn the key from the OFF to On and back OFF FIVE (5) times. 4. Open and close the drivers door SIX (6) times. 5. Remove the key from the ignition. 6. Insert the new key you want to program into the ignition. 7. Wait 1 minute. The security light will be blinking for this one minute. When it stops blinking your key is programmed. To end programming step on brake one time.Timing may be important. I did the key on and off to the count of 1 Mississippi, 2 Mississippi said in regular speech -- or just about on the second. Then switched keys in 3-5 seconds. Then opened the door to the same beat.Remote Programming 1. Close and lock all doors. Unlock and open drivers door. 2. Put key into ignition and remove TWO TIMES. 3. Close and open the drivers door TWO TIMES. 4. Put key into the ignition and remove. 5. Close and open the drivers door two times. 6. Put key into the ignition. Close the drivers door. 7. Turn ignition ON then OFF ONE TIME- this will put the car in ADD mode for your remote. (Turning the ignition ON then OFF TWO TIMES will ADD the remote but will erase all existing remotes.) 8. Remove the key from the ignition. The door locks will cycle one time (or two if you are erasing) . On the REMOTE press and hold the LOCK and the UNLOCK button for 2 seconds. On the REMOTE press the LOCK button for one second.AT THIS POINT, the locks should cycle by themselves ONE time. This means the procedure was accepted. IF the locks cycle twice it has failed. IF this happens you must start over. Hold the remotes higher up for better reception9. Open and close the drivers door. Put key in ignition and pull out. This will end programming.Hoped this helped.
That was for a 2002 Lexus. my mistake I misread the question on the year .This year you need to program the key at the dealer or a mobile locksmith.
It does need to go to the dealer or a mobile locksmith can do this for you .It lost its memory.
Yes all the LS460's have the wireless smart keys,
NO it is not possible for them to "loose" programming so that is NOT the issue here.
If the red indicator light worked on this key but it still does not function but your other key works then you have a bad key here that will need to be replaced. If you are still under the 50,000 mile mark then this is still a free repair under warranty at the dealer. If not then you will be responsible for the repair cost, this key can ONLY be purchased from a Lexus dealer and yes it has to be programmed with a dealers scan tool however do be aware that the Toyota dealers have the same tools so if you order one in the mail you can have a Toyota dealer program this if you have one closer then the lexus dealer.
Also to avoid any repeat trips do be sure to have ALL keys with you when having the new one programmed.