I just got a new lexus remote for the is250 as a backup, and i want to know if i can get my lexus is250 to recognise both remotes as its keys.

Anyone have the answer?

 

There's some way to program them, I'm not sure if you have to go to the dealer for it. The keyless FOBs are different from the older FOBs.

 

Bring it to the dealer. I think thieves will have a feast if they learn how to program a blank key for any Lexus product...

 

A backup for the backup?? Two is enough for me, haven't lost a key fob yet. I'm sure Lexus dealer can program it, but may not be cheap.

 

any way to program one key to two cars?

 

Wow, that would be something cool if you had two same year Lexus'. Never thought of that before!

 

The key isn't programmable. Using the scan tool, the dealer programs the car to recognize the new key.

The system was designed to thwart car thieves; even those who happen to possess a factory scan tool. As described in TSIB EL002-06, if you don't have at least one programmed key, the scan tool will output a "seed number". The dealer must log into their account on the TIS website and enter the seed number. The web site will return a passcode that the dealer types into the scan tool to unlock the immobilizer.

Guessing at the passcode is NOT a good idea. According to the TSIB, one only has 10 attempts to get it right. After 10 failures it locks up and the only way to try again is to replace the certification ECU.

 

That's very comforting to know! Thanks for the new wrinkle in the brain...