Hi, I purchased a new master key and was able to get the remote to work by the instructions found here, but I am unable to start the car with the new key. I'm guessing this has to do with the immobilizer. I cannot get this part of the programming to work correctly. Can anyone post detailed instructions on how to get this to work?

Thanks so much for your help!

 

As far as I know, you'll need to take your car to a Lexus (or Toyota) dealership to get it programmed to your car. Before '04, owners could program the key without the assistance of the dealership by using a special procedure of pedal pressing and opening and closing the doors.

Edit: small typo