Changing the Battery in Your Mazda 3 Key Fob
There is nothing more frustrating than getting in your car after a long work day and finding that the key fob battery is dead. Luckily, this is an easy fix using an easy battery replacement at a hardware store or big box retailer.
A spare key fob to your mazda ignition key 3 can be an cost-effective way to stay away from the hassle of being taken to the dealer and having them re-program your keys.
Battery replacement mazda key fob
You can replace the battery on your mazda 3 key Replacement Cost 3 keyfob at home. But, you should only replace the battery when it goes out of service, or if the key fob displays a message in the multi-information display that reads, “Low key fob battery. Replace battery.”
To open the key fob’s case, you’ll need a tape-wrapped flathead screwdriver, along with some patience. 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 into it to cut off the lower half. Repeat the process for the top metal piece but be careful not to scratch the rubber ring on the bottom of the case.
You’ll find a slot on both sides of the fob case that contains the battery. Make use of the tape-wrapped flathead screwdriver to gently pry open the case, starting with one side and moving to the opposite. Remove the old CR2025 and replace it with a brand new one, making sure to place it face-up to ensure the correct the polarity. Put the cap of the battery on the other side and attach both sides of your key fob case by pressing until they click.
After replacing the battery check the fob to confirm it’s working by locking and unlocking your doors. If everything seems to be in good order you’re good to go. Mazda 3 remote features can be used again.
Pairing Issues
This could be a sign that the transmitter in your car may have been damaged. It’s usually a job that requires a professional. You require a new key fob.
If you’ve tried replacing the battery and reprogramme the key fob, but it’s not working then the chip in the key fob may be defective. This can happen if your keyfob has been dropped or exposed to saltwater or touched by dirty fingers.
To determine the cause of the issue it is necessary to find a small “key” located in the edge of the fob which allows you to open it up and take out the circuit board. You will then be able check for any corrosion or damage on the electronic chip. It is recommended to use a clean paper towel to ensure that the chip is not damaged.
If you aren’t sure it is possible to check the battery connector’s terminals for cracks or breakage. If this is the case, then carefully reconnecting them can usually restore the function of the key fob. You can also check the buttons for damage or wear. If the buttons are loose, they can easily be re-soldered in the event that the button has actually snapped off.
Interference Signals
Few things are more annoying than gazing at a “No Fob Detected” message when you attempt to start your vehicle. This happens at the worst situations, like when you’re late for work or pick up your children from daycare/school. The good thing is that there are steps you can take to troubleshoot the issue and figure out the cause.
Interference signals can affect the remote key fob signal coming from the vehicle making it unable to function properly. This could be caused by objects like buildings, weather conditions and transmitters that operate on the same frequency. Interference may occur if your vehicle is equipped with aftermarket equipment that transmits at the same frequency as your key fob.
The key fob could be damaged if exposed to water or salty water. The rubber seals on the electronic chip may be shattered by water, especially when it is submerged over long periods of time, such as in a swimming pool or at the beach. This can cause the chip’s function to cease, requiring replacement of the key fob. If you have a programmeable key cleaning the chip using isopropyl alcohol or an electronic cleaner to help it return to functionality. If this does not work, the chip is likely to be damaged and will need to be replaced.
Locking or Unlocking the Doors
The buttons on the fob’s key send electronic signals to the solenoid in the car, which converts this signal into mechanical action. It locks and unlocks doors. If the door lock fails to work it could be because of an issue with the solenoid. This requires expert repair shops to look into.
A dead 12 volt could also hinder the fob from working properly. This could happen if the battery is unable to charge, or if the contacts get corroded and stop transferring electricity. The good news is that a new battery is able to solve this issue in only minutes.
The receiver module may be the cause if the key fob doesn’t work after replacing the battery or reprogram the device. The device receives radio frequency signals from the key fob and interprets them to control the functions of the vehicle. It could be a costly repair if the device becomes defective.
To determine whether this is the case, start by putting your spare key into the key slot and setting the ignition to ON. Press the key fob button three times within 10 seconds without removing it. The Mazda 3 system synchronizes the key to the vehicle and you can now use it as your primary remote for driving. This allows you to program up to three keys.