Changing the Battery in Your Mazda 3 Key Fob
There is nothing more frustrating than getting to your vehicle after a long work day and discovering that your key fob battery is dead. This is a simple fix that can be done at a major box retailer or hardware store.
The addition of a spare key fob to your Mazda 3 can be an affordable way to keep yourself from the hassle of being taken to the dealer and having them reprogram your keys.
Battery Replacement
Change the battery in your Mazda 3 key fob is a simple process that you can do at home. It is recommended to replace it when the battery goes out or if you see a message saying "Low keyfob battery" on the multi-information display. Replace battery."
To open the key fob case, you'll need a tape-wrapped flathead screwdriver as well as some patience. Place the flathead screwdriver's head into a notch, or gap on the bottom of the metal of the Mazda 3 key fob to take off the lower portion. Repeat the process for the top metal piece but be careful not to scratch the rubber ring that is on the bottom of the case.
When the fob case is opened, you'll notice a slot on either side of the case, which houses the battery. Make use of the tape-wrapped flathead screwdriver to gently pry open the case, starting on one side before moving to the opposite. Take out the old CR2025 and replace it with a brand new one, making sure that you put it on its face to ensure proper orientation. Then, put the cap back on and reattach both sides to the key fob's case, pressing until you hear them click.
After replacing the battery Lock and unlock your doors to test whether the fob works. If everything is in order the Mazda 3 remote features can be used again.
Pairing Issues
If your key fob stop working all of a sudden it could be a sign that the transmitter in the car has been damaged. It's usually a task to a professional and you will need a new key fob.
If you've tried to change the battery and reprogramme the key fob, but it hasn't worked it is possible that the chip inside the key fob may be defective. This can happen if your keyfob has been dropped or exposed to saltwater or the touch of dirty fingers.
To determine the cause of the issue it is necessary to find a small "key" located in the fob's seam that lets you take it apart and remove the circuit board. You will then be able to check for any corrosion or damage on the chip. It is best to use a clean, dry paper towel to keep the microchip from being damaged.
If you're not sure it is possible to check the battery connector terminals for cracks or breakage. If this is the case, then carefully reconnecting them can usually restore the function of the key fob. It is also possible to check the buttons for damage or wear. If the buttons are loose, they can be soldered back in place in the event that a button has physically snapped off.
Interference Signals
There's nothing more difficult than trying to start your car only to see the message "No Fob Detected". It can happen at the most unfavorable occasions, such as the time you're late to work or you're trying to collect your children from school/daycare. The good news is that there are steps you can take to pinpoint the issue and figure out the root of the problem.
Interference signals can interfere with the remote key fob signal coming from the vehicle making it unable to function properly. new mazda key fob could be caused by objects like weather conditions, buildings, and transmitters that operate on the same frequency. Interference can also occur when you have aftermarket equipment installed in your vehicle that transmits on the same frequency as the key fob.
Additionally, if the key fob is exposed to salt or seawater, it may be damaged. Water can get into the rubber seals of the electronic chip particularly in the event that the key fob is submerged in water for a long time. The chip could stop working and require replacement of the keyfob. If you own a programmable key it is possible to clean the chip using isopropyl alcohol or an electronic cleaner to aid in its get back to its original functionality. If this does not help, the chip is likely to be damaged and will need to be replaced.
Locking and Unlocking the Doors
The buttons on the fob's key send electronic signals to the solenoid inside the car, which converts the signal into mechanical action. This locks and unlocks doors. If the door lock is not working, it may be a solenoid issue that requires investigation with the help of an expert auto repair shop.
A dead 12 volt can also stop the fob from working properly. This can occur if your battery loses its charge or if the contacts become corroded. The good news is that a new battery is able to solve this issue in only minutes.
The receiver module may be the cause of the issue if the key fob isn't working after replacing the battery or program the device. The device interprets radio frequency signals sent by the key fob to control the vehicle. If it fails, it can be expensive to repair.
To verify if this is true, insert your spare key in the key slot. Then turn the ignition ON. Press the key fob twice in a period of 10 seconds, without taking it out. 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 this manner.