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.
Start-up
Loss of a smart keyHyundai Tucson (LM) 2010-2015 Owners Manual: Vehicle Stability Management (VSM)
Vehicle Stability Management (VSM) helps ensure the vehicle stays stable when
accelerating or braking suddenly on wet, slippery and rough roads where traction
over the four tires can suddenly become uneven.
WARNING
Take the following precautions when using the Vehicle Stability Management
(V ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Rear Differential Carrier Repair procedures
Replacement
1.
Drain the differential gear oil.
2.
Remove the rear drive shaft.
3.
Remove the propeller shaft.
4.
Disconnect the coupling control connector (A).
5.
Support the differential assembly (A) with the jack (B).
Tightening torque :
68.6 ~ 88.3N.m (7.0 ~ 9.0kgf.m , 5 ...