Does anyone know where the button in the picture is? I looked there in my RX and couldn't find anything at the level of the hood release - not even a cutout for the buttons. Is it possible that my RX is not equipped with a tire pressure monitor or is this somehow accessed via the nav system?

 

in past lexus vehicles, it is situated under the steering column

 

its under the dash by the foot brake. stick your head under the dash and look up.