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:

AVN Head Unit. Components and Components Location
Components AVN (A/V & Navigation) Head Unit Connector NO Connector A Connector B 1 - CAN H ...

Tire Replacement
1. Park on a level surface and set the parking brake firmly. 2. For manual transaxle vehicles, shift into R (Reverse). For automatic transaxle vehicles, shift into P (Park). 3. Activate the hazard ...

Emission Control System
The emissions control system of your vehicle is covered by a written limited warranty. Please see the warranty information contained in the Warranty Information Booklet in your vehicle. ...