What to Do When the Car Key Won't Unlock the Door?

[VanPaige]

The solutions for when the car key won't unlock the door are: 1. Replace the battery; 2. Use the mechanical key to unlock the door; 3. Inspect and repair the sensor module. The method for replacing the car key battery is: 1. Remove the mechanical key; 2. Insert a flat-head screwdriver into the bottom "open" position and pry up and down; 3. Once a gap appears, use the screwdriver to pry open the key along the gap; 4. Remove the old battery and replace it with a new one. The reasons why the car key won't unlock the door are: 1. Insufficient battery power in the key; 2. The car battery is dead and cannot sense the key; 3. Issues with the sensor key or sensor module.