Kia Optima: Smart key functionsCarrying the smart key, you may lock and unlock the vehicle doors. Also, you may start the engine. Refer to the following, for more details.

Locking
Pressing the button of the front outside door handles with all doors closed and any door unlocked, locks all the doors. The hazard warning lights will blink and the chime will sound once to indicate that all doors are locked. The button will only operate when the smart key is within 0.7~1 m (28~40 in.) from the outside door handle. If you want to make sure that a door has locked or not, you should check the door lock button inside the vehicle or pull the outside door handle.
Even though you press the button, the doors will not lock and the chime will sound for 3 seconds if any of the following occurs:
Unlocking
Pressing the button of the driver's outside door handle with all doors closed and locked, unlocks the driver's door.The hazard warning lights will blink and the chime will sound twice to indicate that the driver's door is unlocked.
Pressing the button in the front passenger's outside door handle with all doors closed and locked, unlocks all the doors. The hazard warning lights will blink and the chime will sound twice to indicate that all doors are unlocked. The button will only operate when the smart key is within 0.7~1 m (28~40 in.) from the outside door handle.
Start-up
You can start the engine without inserting the key. For detailed information refer to “Starting the engine with a smart key” in section 5.
Smart key
Smart key precautionsPhone Setup
All Bluetooth® wireless technology related operations can be performed in PHONE
menu.
1) Push the SETUP button to enter SETUP mode.
2) Select “Phone” item by rotating the TUNE knob, then push ...
Towing
If emergency towing is necessary, we recommend having it done by an authorized
Kia dealer or a commercial tow-truck service. Proper lifting and towing procedures
are necessary to prevent damage to ...
To keep locks from freezing
To keep the locks from freezing, squirt an
approved de-icer fluid or glycerine into
the key opening. If a lock is covered with
ice, squirt it with an approved de-icing
fluid to remove the ice. ...