Defect
On certain vehicles, a sensor for the occupant classification system (OCS) may not have been manufactured properly. As a result, the sensor could short circuit and cause the airbag system to turn off the passenger-front airbag even when a passenger is seated. Note: This problem would cause a warning message to display on the instrument panel and the airbag indicator light would display "passenger airbag off".
Safety Risk
An airbag that is turned off could increase the risk of injury to a passenger in a crash.
Remedy
Toyota will notify owners by mail and advise you to take your vehicle to a dealership to inspect and, if necessary, replace the OCS sensor.