How to Replace the Battery in a Mazda Car Electronic Key?

[Harry]

Pull out the mechanical key, then pry open the key. After separating it, you can see the battery inside. Replace the battery and reassemble the key. The specific steps are as follows: 1. Pull out the mechanical key by pressing the key head and pulling it out directly. 2. Use a flat-head screwdriver to pry open the key along the seam of the key casing. Be sure to follow the seam around to separate the front and rear casings. 3. There is a cover on the battery. After opening the cover, you can see the battery inside and the protective collar, allowing you to replace the battery. After replacing the battery, reassemble the key. Basic principle of the Mazda remote key: The key emits a weak radio wave, which is received by the car's antenna. The electronic control unit (ECU) identifies the signal code, and the system's actuator (motor or electromagnetic coil) performs the lock/unlock action. The system mainly consists of a transmitter and a receiver.