After the car key is replaced with the battery, the remote control needs to be matched again by starting the engine of the car first, then connecting the electronic system of the whole car, pressing and holding the lock key of the driver's door of the car, pressing and holding it for more than 5 seconds, the remote control of the car can be matched.
Replacement steps of vehicle key battery:
1. There is a round button on the side of the car key. Press and hold the button with one hand, and pull out the car mechanical key with the other hand.
2. Hold the key in one hand and the flat screwdriver in the other hand. Find the middle gap on the top of the key and insert a flat screwdriver. Pry the key up and down until the key is pried up. If the key cannot be pried, gradually increase the force until it can be pried.
3. Take out the key circuit board, gently push one side of the battery with your finger, and take out the battery. Put the positive side of the new battery up, place the key battery card slot, and gently push the battery until it is completely stuck.
4. Cover the key circuit board on the key, align the two separated halves of the key with the upper and lower positions, press both sides of the key with your hand until the upper and lower parts of the key fully fit, and then insert the mechanical key into the key gap to complete the work.