Kia Optima: Auto door lock/unlock feature (if equipped)

Impact sensing door unlock system (if equipped)

All doors will automatically unlock when an impact causes the air bags to deploy. ...

Speed sensing door lock system (if equipped)

All doors will be automatically locked after the vehicle speed exceeds 15 km/h (9.3 mi/h). And all doors will be automatically unlocked when you turn the engine off or when you remove the ignition ...

See also:

Adjustment
Glass Adjustment • Check the glass run channel for damage or deterioration, and replace them if necessary. ...

RCV Control Solenoid Valve. Description and Operation
Description RCV (Recirculation Valve) Control Solenoid Valve is installed on the intercooler inlet pipe and operates the RCV actuator which controls the by-pass passage of the turbocharger comp ...

Securing a child restraint seat with “Tether Anchor” system
Child restraint hook holders are located on the package tray. 1.Route the child restraint seat tether strap over the seatback. For vehicles with adjustable headrests, route the tether strap unde ...