14 Smart Strategies To Spend The Remaining Mazda 6 Key Fob Budget Changing the Battery in Your Mazda 3 Key Fob

It is frustrating to pull into your car at the end of a long, hard day and discover that the key fob is dead. This is a simple fix that can be done at a major box retailer or at a hardware store.

Incorporating a spare key fob to your Mazda 3 can be an cost-effective way to stay away from the hassle of being driven to the dealership and having them reprogram your keys.

Battery Replacement

You can change the battery on your Mazda 3 keyfob at home. It is recommended to replace it when the battery dies or if you get a message that reads "Low keyfob battery" on the multi-information display. Replace battery."

You'll need to use a flathead screwdriver with tape and patience to open the case. Locate a notch or gap in the bottom metal part of the Mazda 3's key fob and then insert the tip of the screwdriver in it to pry off the lower part. Repeat the process for the top metal piece, but be sure not to damage the rubber ring that is on the bottom of the case.


There is a slot on each side of the case that houses the battery. Make use of the tape-wrapped flathead screwdriver to gently open the case, beginning at one end and moving to the other. Take out replacement mazda 3 key and replace it with a new one, ensuring that you put it on its face to ensure the correct orientation. Put the cap of the battery on again and attach both sides of your key fob case by pressing until they click.

Once you've replaced your battery, test the fob to verify that it is working by locking and unlocking your doors. If everything appears to be working you're good to go. Mazda 3 remote features can be used again.

Pairing Issues

This could mean that the transmitter inside your car is damaged. This usually requires an expert repair and may need a new key fob.

If you've tried to replace the battery and reprogram the key fob but it's not working then the chip in the key fob may be faulty. This can occur if the key fob has been dropped on hard surfaces, exposed to salt water, or even touched by dirty hands.

You will need to locate a small "key", which is built into the seam, in order to remove the circuit board and determine the issue. You can then examine the chip for damage or corrosion. It is best to clean the paper towel to ensure that the chip is not damaged.

If you're unsure it is possible to check the battery connector terminals for cracks or breaks. If this is the case, then carefully soldering them back in place will usually restore the function of the key fob. Similarly, you can inspect the buttons to see whether they are worn out or damaged. If the buttons are loose they can be soldered back into place, unless one has physically snapped.

Interference Signals

There's nothing more frustrating than trying to start your car and seeing the message "No Fob Detected". It usually happens at the most awkward time, such as when you are late for work or if you're picking up kids from daycare/school. The good thing is that there are a few steps you can take to troubleshoot the issue and determine what is causing it.

Interference signals can disrupt the remote key fob signal from the vehicle which causes it to not function correctly. This can be caused by things like buildings, weather conditions and transmitters that use the same frequency. Interference can also occur if you install aftermarket equipment in your vehicle that transmits on the same frequency as the key fob.

Additionally, if the key fob is exposed to salt or water the water, it might be damaged. The rubber seals on the electronic chip may be damaged by water, especially when it is submerged for an extended period of time such as in the ocean or a pool at the beach. The chip could stop working and require replacement of the keyfob. If you have a key that has the ability to be programmed or programmed, you can clean it with isopropyl or electronic cleaners to restore its function. If this doesn't work, the chip is likely fried and will need to be replaced.

Locking and Unlocking the Doors

The buttons on the key fob transmit electronic signals to a solenoid in the car that then converts that signal into mechanical action that locks and unlocks the doors. If your door lock does not work it could be due to an issue with the solenoid. This requires professional auto repair shops to examine.

A dead battery of 12 volts can also stop the fob from functioning correctly. This can happen if the battery loses its charge or the contacts become corroded, and stop transferring electricity. The problem can be addressed in a matter of minutes by replacing the battery.

The receiver module may be the cause if the key fob isn't working after replacing the battery or re-program the device. This device interprets radio frequency signals sent by the key fob to control the vehicle. If it fails it could be costly to repair.

To check whether this is the case, start by inserting the spare key into the key slot and setting the ignition to ON. Press the key fob twice in a matter of 10 seconds without removing it. The Mazda 3 system will now connect the key to the car and you can use it as your primary remote for driving. You can program up to three keys in this way.