Why Can't the Mechanical Key Open the Car Door When the Car Has No Power?

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Nowadays, many car doors are fully equipped with electronic locks, meaning even when using a mechanical key to open the door, the lock cylinder's rotation triggers an electronic switch inside the door lock, and then the electronic actuator operates to unlock the door. Here are some details about mechanical keys: 1. Remote Key Slot: Some car models design this slot inside the center console, while others place it under the mat in the cup holder. When the remote key runs out of battery, inserting it into this slot allows the car to detect the key's presence after a short wait, enabling the use of the one-touch start function to open the door. 2. Using the Mechanical Key: Some one-touch start models still retain the mechanical key start method. Locating the keyhole and inserting the mechanical key allows starting the car in the traditional way. Typically, the keyhole is hidden near the one-touch start button.