Changing the Battery in Your mazda 3 spare key 3 Key Fob

There's nothing more frustrating than getting to your vehicle after a long day and discovering that your key fob battery is dead. This is a simple fix that can be done at a big box retailer or hardware store.

A spare key fob for your Mazda 3 is an inexpensive way to avoid having to take your vehicle to a dealer to have them re-program your keys.

Battery Replacement

The battery replacement in your Mazda 2 Spare Key 3 key fob is an easy procedure that you can do at home. But, you should only replace the battery when it is dead, or if the key fob shows a message on the multi-information display stating, "Low key fob battery. Replace battery."

You'll need to use a flathead screwdriver with tape and patience to open the case. Put the head of the flathead screwdriver in a notch, or gap, on the bottom metal of the Mazda 3 key fob to remove the lower part. Repeat the procedure for the top piece of metal, but be sure not to scratch the rubber ring at the bottom of the case.

There's a slot the opposite side of the case that contains the battery. Start on the other side of the case and gently push it open. Remove the old battery, and put in a new CR2025 ensure that it's facing upwards to ensure the correct orientation. Finally, put the cap back on and reattach both sides of the key fob's case. Continue pressing until you hear them click.

Now that you've replaced the battery check the fob to confirm it's working by locking and unlocking your doors. If everything is in order then your Mazda 3 remote features can be used again.

Pairing Issues

If your key fob stops working all of a sudden, this could indicate that the transmitter in the car is damaged. It is typically a need for an expert repair and will likely require a new key fob.

If you've attempted to replace the battery and reprogramme the key fob, but it's not working then the chip in the key fob could be defective. This can happen if your keyfob has been dropped, exposed to saltwater, or was touched by dirty fingers.

To determine the cause of the issue You will need to find a small "key" built into the edge of the fob that lets you open it and take out the circuit board. Then, you will be able check for any corrosion or damage on the electronic chip. To prevent damaging the chip, it's recommended to use a clean paper towel.

You can also examine the battery connector's terminals to determine if they're cracked or broken. If this is the situation then resoldering the terminals to their original position will usually bring back functionality to the key fob. It is also possible to check the buttons for wear or damage. If the buttons are loose they can be soldered back into place unless one has physically snapped.

Interference Signals

Few things are more frustrating than staring at the "No Fob Detected" message when you attempt to start your car. This happens at the worst occasions, such as when you're late for work or when you have to pick up your children from school or daycare. There are some things you could do to troubleshoot and find out what's the cause.

Interference signals can affect the remote key fob signal coming from the vehicle which causes it to not work properly. This can be caused by objects like buildings, weather conditions, and transmitters that use the same frequency. Interference may also occur if you have an aftermarket device installed in the vehicle that transmits at the same frequency as the key fob.

The key fob may also be damaged if exposed to water or salty water. The rubber seals on the electronic chip could be penetrated by water, particularly if it is submerged for an extended period of time, like in a pool or at the beach. The chip could stop working and require replacement of the keyfob. If you own a programmable key, you can clean the chip using isopropyl alcohol or an electronic cleaner to help it return to functionality. If this doesn't help you can be sure that the chip has burned out and must be replaced.

Locking and Unlocking of Doors

The buttons on the key fob send electronic signals to the solenoid of the car, which then transforms this signal into a mechanical action. This locks and unlocks doors. If your door lock fails to work it could be because of an issue with the solenoid. This requires expert auto repair shops to examine.

A dead 12 volt battery can cause the fob to stop functioning correctly. This could happen if your battery fails to charge or if the contacts are corroded. The good news is that a new battery is able to resolve this issue in a matter of minutes.

If the key fob isn't working after you change the battery or reprogram it, the issue might be with the receiver module. The device receives radio frequency signals from the key fob and interprets them into controlling the functions of the vehicle. If it breaks down it could cost a lot to repair.

To determine if this is true, put your spare key into the key slot. Then turn the ignition ON. Press the key fob button three times in a matter of 10 seconds without removing it. The Mazda 3 system synchronizes the key with the vehicle, so you can use it as your primary remote for driving. This allows you to program up three keys.