Changing the Battery in Your Mazda 3 Key Fob

There's nothing more annoying than stepping into your vehicle after a long day and discovering that the key fob battery is dead. This is a straightforward fix that can be done at a major box retailer or hardware store.

Adding a spare key fob to your Mazda 3 can be an affordable solution to free yourself from having to be taken to the dealer and having them re-program your keys.

Battery Replacement

You can replace the battery on your Mazda 3 keyfob at home. It is recommended to replace it if the battery is dead or you see a message reading "Low keyfob battery" on the multi-information display. Replace battery."

To open the case of your key fob, you'll need a tape-wrapped flathead screwdriver as well as some patience. Locate a notch or gap in the bottom part of the metal of the Mazda 5 replacement key cost 3's key fob, and then insert the tip of the screwdriver into it to cut off the lower half. Repeat this process for the top metal part however, be careful not to damage the rubber ring at bottom of the key fob's case.

There's a slot each side of the fob case, which houses the battery. Start on the other side of the case, and then gently push it open. Remove the old CR2025 and replace it with a new one, ensuring that you put it on its face to ensure the correct orientation. Install the cap on the battery the other side and attach both sides of your key fob case by pressing until they click.

After replacing the battery, lock and unlock your doors to confirm whether the fob works. If everything looks good then you can begin using your Mazda 3's remote capabilities on the road again!

Pairing Issues

If your key fob has stopped functioning suddenly it could be because the transmitter in the car has been damaged. This usually requires an expert repair and will likely require a replacement key fob.

If you've tried replacing the battery and reprogramming the key fob, but did not resolve the issue it is possible the chip in the key fob may be damaged. This can occur if the key fob was dropped on hard surfaces or exposed to salt water or even touched by dirty hands.

To diagnose this issue To determine the cause, you must find a small "key" embedded in the fob's seam that allows you to take it apart and remove the circuit board. You can then check the electronic chip for damage or corrosion. It is best to use a clean paper towel to ensure that the chip is not damaged.

If you aren't sure, you can also check the battery connector terminals for cracks, or breaks. If this is the case, carefully soldering them back in place will usually restore the function of the key fob. You can also inspect the buttons for damage or wear. If the buttons are loose, they can easily be re-soldered in the event that the button is actually snapped off.

Interference Signals

There are few things more frustrating than trying to get the engine started in your car and seeing the message "No Fob Detected". It can happen at the most unfavorable possible times, like when you're running late to work or you're trying to collect your ehicle's functions. It can be expensive to repair if it becomes faulty.

To determine whether this is the case, begin by inserting the spare key into the key slot and setting the ignition to ON. Press the key fob twice in a period of 10 seconds, without taking it out. The mazda key repair 3 system will now synchronize the key with the car and you can use it as your primary remote for driving. This allows you to program up three keys.