Lexus 2013 GS 350 Owner's Manual page 26

Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classification
system. This system detects the conditions of the front passenger seat
and activates or deactivates the devices for the front passenger.
Seat belt reminder light
1
SRS warning light
2
"AIR BAG OFF" indicator light
3
"AIR BAG ON" indicator light
4
GS350_U (OM30C34U)
1-1. For safe use
I n f o r ma t i o n P r o v i d e d b y :
1