Remote Keyless Entry

Using the Remote Keyless Entry
Lock (1)
All doors lock when you press the lock button. If all doors (and the trunk) are closed, the hazard lights flash once to indicate that all doors (and the trunk) are locked.
If you press the lock button for more than 4 seconds, the hazard lights will flash and the horn will sound once, confirming that the door is locked.
However, if a door is open, the hazard lights (and/or the horn) will not operate. If all doors are closed after you press the button, the hazard lights will flash once.
Unlock (2)
Press the unlock button once to unlock the driver's door. The hazard lights will flash twice (with the Smart Key, the horn also sounds), indicating that the driver's door is unlocked.
If you press the unlock button again within 4 seconds, all doors will unlock. The hazard lights will flash twice more (with the Smart Key, the horn also sounds), indicating that all doors are unlocked. After pressing the button, the doors will automatically relock if no door is opened within 30 seconds.
Trunk Release (3) (if equipped)
Press and hold this button for more than one second to open the trunk. Once the trunk is opened and closed again, it locks automatically.
Panic Alarm (4, if equipped)
The horn sounds and the hazard lights flash for approximately 30 seconds if you press this button for more than 0.5 seconds.
To turn off the horn and hazard lights, press any button on the transmitter.
Warnings
NOTICE
The transmitter (or Smart Key) will not work under the following conditions:
- The ignition key is in the ignition switch.
- You are beyond the range of the transmitter (or Smart Key) (approximately 30 m (90 ft)).
- The battery of the transmitter (or Smart Key) is low.
- Other vehicles or objects are blocking the signal.
- The temperature is extremely cold.
- The transmitter (or Smart Key) is near a radio transmitter, such as a radio station or airport, which interferes with normal operation of the transmitter.
If the transmitter (or Smart Key) does not work properly, lock and unlock the door with the ignition key. If you experience any difficulty with the transmitter (or Smart Key), consult an authorized Kia dealer.
CAUTIONKeep the transmitter (or Smart Key) away from water or liquids. If the remote keyless entry system does not work after being exposed to water or moisture, the problem will not be covered by the vehicle manufacturer's warranty.
This device complies with Industry Canada RSS-210. Operation is subject to two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
Any change or modification not expressly approved by the party responsible for compliance may void the user's authority to operate this device. If the remote keyless entry does not work due to changes or modifications not approved by the party responsible for compliance, it will not be covered by the manufacturer's warranty.

Replacing the batteries
The battery should last several years. If the transmitter or the smart key stops working properly, replace the battery with a new one. If you are not sure how to use or install the battery, consult an authorized Kia dealer.
- Open the center cover of the transmitter or smart key.
- Replace the battery with a new one (CR2032). When replacing the battery, make sure the positive "+" side of the battery is facing up, as shown in the illustration.
- Close the transmitter in the reverse order of opening it.
- The transmitter or smart key is designed to operate trouble-free for years. However, exposure to moisture or electrostatic discharge may cause malfunction. If you are not sure how to use or install the battery, consult an authorized Kia dealer.
- Using the wrong battery may cause the transmitter or smart key to malfunction. Make sure to use the correct battery.
- To avoid damaging the transmitter or smart key, do not drop it, do not get it wet, and do not expose it to direct sunlight or heat.
- A battery disposed of improperly can be harmful to the environment and human health. Dispose of the battery in accordance with local laws or regulations.
Test yourself
A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.