ivan67

Help! I just purchased a key from the dealer($190) and would like to try to program it myself to save me $60 . I have seen a number of posts on this board but each is different and I have tried and failed at all of them, can someone please post specific instruction on how to program my key? Thanks

DanozLS430

iTrader: (1)

Here is the key programming info for your 2003 LS430 with remote programming info as well.

Let me know if it works.....DanozLS430

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 the brake one time.

NOTE: You have 35 seconds to complete steps 1-5 and 10 seconds to complete step 6. If you do not do this procedure fast enough the car will not go into programming mode and your key will not program.

If the security light does not go out after 1 minute start the procedure over again.



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 reception

9. Open and close the drivers door. Put key in ignition and pull out. This will end
programming.

ivan67

I got the remote part to work but I cant seem to get the second step to work so I can start the car. Could it be that there are too many keys in the system and I have to try to clear the system? I thought that if the system is full it just bumps the first key that was added but I could be wrong. I will keep trying

ivan67

Ok, I finally got it to work. Thanks so much Danoz!

DanozLS430

iTrader: (1)

You are welcome!

erdos2

Could someone please post the correct way to program a spare key for a 2003 Lexus LS430? I have visited several sites and at each one the information was different. I found one site that gave me the correct information on how to program my new remote. However, at no site was I given the correct information on how to program the key. I have followed each step exactly as instructed to no avail. If it can only be programmed by a Lexus shop, then I'll have to drive 125 miles to do so. If there is someone out there who could help me I would be mighty grateful. It seems to me that at every site, a critical piece of information has been left out. I'm just not sure what step has been left out. You would think that after 60 plus attempts over the last month, at least I would have been successful once. HELP!

Zim430

awesome information i'm glad i got on this forum because i just ordered a new key for my LS430

Zim430

I got a new key for my 2003 LS 430 because as you all know those keys suck and they all break eventually. The one i ordered looks just like the older benz keys the one where you push the button and the key swings out like a knife blade but on the base of the key it has the same Lexus style lock, unlock and panic button. i only paid like $35 for it and it is way more durable than the one's made for the 2003 430. The dealer said they charge $30 to cut the key which is fine but i'm going to follow the instructions by Danoz430 and hope all goes well thanks for all the info

offbad

iTrader: (5)

this worked for me earlier today with my one modification in red above.

i only needed to program a valet type key (no 3 button remote functions)

the key i used was a pre-cut lexus branded 4D key

i have had similar success with a Platinum Edition branded key as well.

Asaa

Hello everyone,
I lost my master key. I cut a new one by the vin number, but it wouldn't run the car it just opened the doors. Are ther any way to program the new key without master key