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.
Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Operation and Leakage Check
Check all of the following items:
ComponentProcedureBrake Booster (A)Check brake operation by applying the brakes during a test
drive. If the brakes do not work properly, check the brake booster.
Replace the brake booster as an assembly if it does not work properl ...
Hyundai Sonata LF 2014-2019 Service Manual: Trunk Lid Assembly Repair procedures
Replacement
•
Wear gloves to protect hands from injury.
•
When removing and installing the trunk lid, an assistant is necessary.
1.
Remove the trunk lid trim.
(Refer to Trunk Lid - "Trunk Lid Trim")
2.
Disconnect the connector ...