Changing the Battery in Your Mazda 3 Key Fob
There is nothing more frustrating than stepping into your vehicle after a long and tiring day and discovering that your key fob battery is dead. This is a straightforward fix that is easily done at a big box retailer or at a hardware store.
A spare key fob to your Mazda 3 can be an cost-effective way to stay away from the hassle of being transported to a dealership and having them reprogram your keys.
Battery Replacement
The battery replacement in the Mazda 3 key fob is a simple process that you can do at home. But, you should only replace the battery when it dies, or if the key fob shows a message on the multi-information display that reads, "Low key fob battery. Replace battery."
To open the case of your key fob it requires a tape-wrapped flathead screwdriver as well as some patience. Find a gap or notch in the bottom part of the metal of your Mazda 3's key fob and then insert the head of the screwdriver to pry off the lower part. Repeat this process for the top metal piece Be careful not to damage the rubber ring that is at the bottom of the key fob's case.
There's a slot both sides of the fob case that houses the battery. Use the tape-wrapped flathead screwdriver to gently open the case, starting at one end and moving to the other. Remove the old battery and then put in a new CR2025 to ensure that it's face-up for proper polarity. Finally, place the cap of the battery back on and reattach both sides of the key fob case, pressing until you can hear them click.
Now that you've replaced the battery check the fob to ensure it is working by locking and unlocking your doors. If everything appears to be working then your Mazda 3 remote features can be used again.
Pairing Issues
If your key fob stopped suddenly it could be a sign that the transmitter inside the car has been damaged. It's usually a task that requires a professional. You will require a brand new key fob.
If you have tried replacing the battery and reprogramming the key fob, but has not solved the problem, it is possible that the chip inside the key fob may be damaged. This can occur if the key fob has been dropped on hard surfaces, exposed to salt water or even touched by dirty hands.
To determine the cause of the issue To determine the cause, you must find a small "key" built into the seam of the fob which allows you to open it and take out the circuit board. Then, mazda 2 replacement key fob can check the chip for corrosion or damage. It is best to use a clean paper towel to ensure that the chip is not damaged.
If you're not sure then you should also examine the battery connector terminals for cracks or breakage. If this is the case, then carefully connecting them back can often 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 soldered back in place as well unless the button has actually snapped off.
Interference Signals
There are few things more frustrating than trying to start your car and then seeing the message "No Fob Detected". It typically happens at most unpopular times, such as when you are late for work or when you have to pick up children from daycare/school. There are a few things you can do to help figure out what's causing the problem.
Interference signals can cause the remote key fob to stop functioning in a proper manner. This could be due to things like weather conditions, buildings, as well as transmitters operating on the same frequency. Interference could occur if your vehicle has aftermarket equipment that transmits at the same frequency as your key fob.
In addition, if the key fob is exposed to salt or water seawater, it may be damaged. The rubber seals on the electronic chip may be shattered by water, particularly when it is submerged for long periods of time such as in a swimming pool or at the beach. The chip may cease to function and require replacement of the keyfob. If you have a key that can be programmed to work, you can clean it with isopropyl and electronic cleaners to bring it back to its original functionality. If this does nothing will be able to fix the issue, then the chip has burned out and requires replacement.
Locking/Unlocking the Doors
The buttons on the keys send electronic signals to a solenoid within the car. It converts that signal into mechanical action that locks and unlocks the doors. If the door lock is not working, the issue could be due to a solenoid problem that requires some investigation with the assistance of a professional auto repair shop.
A dead 12V battery can also prevent the fob from working effectively. This happens when the battery is unable to charge or if the contacts are corroded and stop transmitting electricity. This issue can be solved in a matter of minutes by replacing the battery.
If the key fob doesn't work after you have changed the battery or program it again, the issue might be with the receiver module. The device receives radio frequency signals from the key fob and interprets them to control the functions of the vehicle. If it breaks down it could cost a lot to fix.
To determine whether this is the case, begin by inserting your spare keys into the key slot and setting the ignition to ON. Press the key fob twice within 10 seconds, but without taking it out. The Mazda 3 system synchronizes the key with the vehicle, so you can use it as your primary driving remote. This lets you program up to three keys.