What Causes One Car Door to Not Lock?

[StAdriana]

The reasons why one car door cannot be locked include: 1. Faulty or insufficient pulling force of the door lock motor; 2. Corrosion or rust on the locking mechanism; 3. Non-standard positioning of the door lock motor latch; 4. The door was not properly closed when exiting the vehicle. Car doors provide access for drivers and passengers, isolate external interference, mitigate side impacts to some extent, and protect occupants. The design requirements for car doors are: 1. Ensure convenient entry and exit for passengers, with an opening angle controlled between 65 to 70 degrees; 2. Avoid positional interference with other parts during the opening process; 3. Reliable locking when closed, preventing unintended opening while driving; 4. Good sealing performance; 5. Sufficiently large transparent area to meet lateral visibility requirements; 6. Adequate strength and rigidity to ensure reliable operation, reduce door vibrations, enhance side impact safety, and prevent door sagging.