Door Locks
Before driving (especially if children are in the vehicle), make sure that all doors are securely closed and locked and cannot be accidentally opened from inside the vehicle.
Also, when seat belts are used correctly, locking the doors helps prevent passengers from being thrown out of the vehicle in the event of a traffic accident.
Before opening a door, always make sure that no traffic is approaching.
Locking and Unlocking the Front Doors with the Key
The door can be locked and unlocked with the key.
To lock the door, turn the key toward the front of the vehicle; to unlock the door, turn the key toward the rear of the vehicle.

Key turning directions for unlocking and locking the door lock
Locking the Doors from the Outside of the Vehicle
The doors can be locked without using the key.
To lock the doors from outside the vehicle, first set the interior door lock button to the "LOCK" position, then close the door.

Location of the interior door lock button
When locking the doors this way, be careful not to lock the ignition key inside the vehicle.
To prevent theft, always remove the key from the ignition switch, raise all windows, and lock all doors when leaving your vehicle unattended.
Locking the Doors from the Inside of the Vehicle
To lock the doors from inside the vehicle, simply close the door and set the interior door lock button to the "LOCK" position. After this, the door cannot be opened using the exterior or interior door handles.

Interior door lock button positions
Test yourself
A quick Hyundai Accent quiz: every answer comes with an explanation and a link to the manual page.