What Causes the Rear Door to Not Lock?

[MacKevin]

The reasons why the rear door cannot lock are as follows: 1. Poor line contact: Check if the locking actuator is functioning. If not, it is likely due to poor contact in the central control system wiring. 2. High mechanical resistance: If it is functioning, the issue might be high resistance in the locking mechanism, usually caused by rust. 3. Displacement of the lock catch: The position of the motorized lock catch may have shifted, which can be adjusted at a repair shop. 4. Motor damage: Another possible reason is damage to the door lock motor or insufficient pulling force, which requires motor replacement.