Hyundai Elantra HD: Impact sensing door unlock system (if equipped) - Door locks - Features of your vehicle - Hyundai Elantra HD 2006–2010 Owners ManualHyundai Elantra HD: Impact sensing door unlock system (if equipped)

All doors will be automatically unlocked when the impact is delivered to impact sensors while the ignition switch ON. However, the doors may not be unlocked when there are some problems of mechanical door lock system or battery.

With central door lock switch (if equipped)
Driver’s door It is operated by depressing the door lock switch. If the “Lock” position is switched when any door is open, the door will remain locked when closed. When pushing down on ...

Speed sensing door lock system (if equipped)
When the speed of the vehicle is above approximately 12 MPH (20 km/h) for 1 second, it will automatically lock all doors. For activation of this feature, contact an authorized Hyundai dealer. ...