The solution to the sudden failure of the car remote control key:

Step 1: Slide the safety switch on the remote control key shell.
Step 2: Take out the mechanical key. Hidden mechanical keys are usually made of iron or plastic. For mechanical keys made of plastic, do not use too much force when turning the keyhole to prevent the key from breaking inside.

Step 3: Insert the mechanical key into the door lock to open the door. It takes a little force to turn the mechanical key. Hearing an unlocking sound proves that the car lock has been unlocked.