What are the reasons for being unable to open the car door from both inside and outside?

[ORobert]

Here are the relevant reasons why a car door cannot be opened: 1. Child lock is activated: Generally, the rear doors of vehicles are equipped with a child lock, marked by a child symbol on the side of the door. If it is accidentally left activated when the door is closed, the door cannot be opened. Therefore, when closing the door, always check if the child lock is deactivated. If the door cannot be opened, use a flathead screwdriver to turn the child lock to the off position. 2. Door lock cable malfunction: When this occurs, the door cannot be opened from either inside or outside the car, as the malfunctioning cable directly affects the lock mechanism. In such cases, the only solution is to replace the door lock cable to restore normal door operation. 3. Door hinge or lock post deformation: If the door is subjected to external force, it may cause deformation of the hinges or lock post, which can also prevent the door from opening. In such situations, the door and hinges must be disassembled together and replaced with new hinges and a lock post to ensure proper door function. 4. Door limiter malfunction: A faulty door limiter is another reason why a door may not open. When this happens, opening the door requires excessive force or becomes impossible. The solution is to replace the door limiter, which will allow the door to open and close smoothly.