Anyone know how to program an additional Master Key for a 2003 LS430, or can this only be done at the Dealer?

Frank

 

Anyone?

Bump

 

See if this works:

Programming replacement keys. 1998 and up Lexus models:

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'98 and up Lexus GS300, LS400, ES300, SC400

This system is based on the Texas Instruments fixed code transponder. The onboard computer cannot be programmed without a working pre-programmed transponder key. Duplicate keys can be programmed into the system as long as there is at least one working pre-programmed key available. The system can accept a maximum of 10 different keys.

Because the coding of the keys is proprietary and is protected by copyright law, cloning is not possible at this time for this system. Until Texas Instruments agrees to license this technology, the only way to program duplicate keys will be by the process outlined below.

Key blanks: Ilco / Silca TOY40BT4

Replacement key blanks can be ordered from any Lexus dealer.

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Programming Steps:
1. Enter the car with a working pre-programmed key and close all doors. Simultaneously depress and release both the brake and the accelerator pedals.
2. Within 5 seconds, insert the working pre-programmed key into the ignition. Do not turn the key.
3. Within 15 seconds of inserting the ignition key, depress and release the accelerator pedal 5 times.
4. Within 20 seconds, depress and release the brake pedal 6 times.
5. Within 10 seconds, remove the working pre-programmed key from the ignition.
6. Within 10 seconds, insert the newly cut transponder key into the ignition.
7. Depress and release the accelerator pedal one time. The security light should now begin flashing to indicate that the computer is reading the new key and programming the system.
8. Leave the new key in the ignition for at least 60 seconds. When the security light stops flashing, the programming process should be complete.
9. Start the vehicle using the new key to verify that programming was successful.


thanks to retrodrive.
http://www.cureline.net/lex/howtos/h...m#Programming3

 

Reprogramming the secuity transponder is one thing. How about actually cutting the blank key? I had a dealer tell me that they will only cut a blank that they sell ($$$) and the machine to do this is very expensive and not available except from a dealer.

Anyone have experience in getting the blank cut to match the lock?

 

What *******s, Sewell will cut your keys if you buy the key from them for an extra $10, and im sure our specialized Key vendor will help you cut your key cheap (they are VIN specific).

Here is his website, very helpful and friendly guy:
https://www.lexuskeys.info/

Here's Sewell's website just in case you can reach the person above:
https://www.lexus-parts.com