See also:

Setting a mobile phone
Registering a mobile phone in the hands-free phone system allows the system to function. The following functions can be used for registered mobile phones: Functions and operation procedures To e ...

If you lose your keys
New genuine Lexus keys can be made by your Lexus dealer using the other keys and the key number stamped on your key number plate. ...

Immobilizer system
The vehicle's keys have built-in transponder chips that prevent the hybrid system from starting if the key has not been previously registered in the vehicle's on-board computer. Never leave the key ...