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:

Curtain Airbag (CAB) Module Description and Operation
Description Curtain airbags are installed inside the headliner (LH and RH) and protect the driver and passenger from danger when side crash occurs. The SRSCM determines deployment of curtain ai ...

Installation
Refer to "High Pressure Fuel Pump" in this group. ...

Power Seat Motor. Repair procedures
Inspection Power Seat Motor 1. Disconnect the connectors for each motor.A : Front height motor B : Slide motorC : Rear height motor D : Recline motorE : Lumber support motor ...