Hyundai Sonata: Smart Key / Mechanical key

If the Smart Key does not operate normally, you can lock or unlock the door by using the mechanical key.

Press and hold the release button (1) and remove the mechanical key (2). Insert the mechanical key into the key hole on the door.

To reinstall the mechanical key, put the key into the hole and push it until a click sound is heard.

Start-up
You can start the engine without inserting the key. NOTICE To prevent damaging the smart key: Keep the smart key away from water or any liquid and fire. If the inside of the smart key gets damp (d ...

Loss of a smart key
A maximum of two Smart Keys can be registered to a single vehicle. If you happen to lose your smart key, you should immediately take the vehicle and remaining keys to your authorized HYUNDAI dealer ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: How to deactivate the Smart Trunk function using the smart key
1. Door lock 2. Door unlock 3. Trunk open 4. Panic If you press any button of the smart key during the Detect and Alert stage, the Smart Trunk function will be deactivated. Make sure to be aware of how to deactivate the Smart Trunk function for emergency situations. Information If you press the ...

Hyundai Sonata LF 2014-2019 Owners Manual: Remote key precautions
The remote key will not work if any of the following occur: The key is in the ignition switch. You exceed the operating distance limit (about 90 feet [30 m]). The remote key battery is weak. Other vehicles or objects may be blocking the signal. The weather is extremely cold. The remote key is ...

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