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 in to 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.
Hyundai Tucson (LM) 2010-2015 Service Manual: Components and Components Location
Components
1. Receiver2. TPMS Sensor3. TPMS Sensor4. TPMS Sensor5. TPMS Sensor
...
Hyundai Tucson (LM) 2010-2015 Owners Manual: Tailgate
Opening the tailgate
1. Make sure the shift lever is in P (Park, for automatic transaxle) or neutral
(for manual transaxle) and set the parking brake.
2. Perform one of the following:
- Press the smart key Tailgate Unlock button for more than one second.
- Press the button on the tailgate it ...