How to Replace the Battery in an Axela Car Key?
3 Answers
First, remove the mechanical key. Then, use a screwdriver to gently pry open the key along the middle seam. If you don't have a screwdriver, you can use scissors or a knife, but proceed slowly and carefully. Next, peel off the round sticker, remove the old battery, and replace it with a new one. Finally, firmly press the back cover back into place. Below is some relevant information about the Axela key: 1. Basic components of the Axela key: The system mainly consists of two parts: the transmitter and the receiver. Transmitter: Composed of a transmission switch, transmission antenna (keypad), integrated circuit, etc. It contains an identification code storage circuit and an amplitude modulation circuit, with a button-type lithium battery installed on the opposite side of the circuit. 2. The transmission frequency is selected according to the radio standards of the country of use. Each time the transmission switch is pressed, a signal is sent. Receiver: After the transmitter sends the identification code via shortwave modulation, it is received by the car's shortwave antenna and processed through a distributor into the shortwave high-frequency amplification processor of the receiver's electronic control unit for demodulation. The demodulated identification code is then compared; if it is the correct code, it is input into the control circuit to activate the actuator.
As a frequent driver of the Mazda3 Axela, I find changing the key battery quite simple. First, locate the small seam on the side of the key and gently pry open the casing with a fingernail or a flat-head screwdriver—don’t use too much force to avoid cracking it. Inside, there’s a small coin-cell battery, typically a CR2032 model. I use Panasonic brand for reliability. When removing the old battery, be careful not to touch the circuit board. Insert the new battery with the round side down and the lettering side up, aligning it with the slot before pressing firmly. Finally, snap the casing back on and press to ensure it’s secure. Test the remote function by pressing the lock button to see if the red light flashes. Remember, the battery lasts about two years, and high summer temperatures can drain it faster. I check mine every year and a half—once it’s a habit, you won’t have to worry about a dead key when heading out. Keep a few spare batteries in your car’s toolbox for emergencies during rainy days or if you forget to replace them, making your driving life much smoother.
As a seasoned driver with over a decade of experience, changing the key battery for a Mazda3 isn't too difficult. There's usually a small notch on the back of the key - use a plastic pry tool or an old bank card to gently open the casing (avoid sharp tools to prevent injury). The CR2032 battery is housed inside - always purchase genuine products as counterfeit batteries may leak. After removing the old battery, insert the new one with the positive side facing outward and press the casing until you hear a click. Test the remote lock/unlock buttons to confirm successful replacement. Check the battery's expiration date and avoid old stock. Keep the packaging with anti-counterfeit codes for reference. I recommend learning this during the new car phase to save dealership fees later. Replace the battery when the low-power indicator lights up - don't wait for failure. Always keep a spare key in your car for emergencies.
