Changing the Battery in Your Mazda 3 Key Fob
There's nothing more annoying than stepping into your vehicle after a long and tiring day and finding that the key fob battery is dead. Fortunately, it is an easy fix with the simple replacement of a battery at a hardware store or big box retailer.
mazda keys replacement cost for your Mazda 3 is an inexpensive way to avoid having to take it by a dealership to let them re-program your keys.
Battery Replacement
You can replace the battery on your Mazda 3 keyfob at home. But, you should only replace the battery when it fails, or when the key fob displays a message in the multi-information display, "Low key fob battery. Replace battery."
You'll need to use a flathead screwdriver with tape and patience to open the case. Find a gap or notch in the bottom metal part of your Mazda 3's key fob and insert the head of the screwdriver into it to cut off the lower part. Repeat this process for the top part of the metal, but be careful not to damage the rubber ring at the bottom of the key fob's case.
There is a slot on the opposite side of the case, which houses the battery. Use the tape-wrapped flathead screwdriver to gently pry open the case, beginning with one side and moving to the next. Remove the battery that was used and place in a new CR2025 ensure that it's face-up for the correct polarity. Install the cap on the battery again, and then attach both sides of your key fob case by pressing until they click.
Now that you've replaced the battery Check the fob to verify that it functions by locking and unlocking your doors. If everything looks good then you're able to use the Mazda 3's remote features for the first time!
Pairing Issues
This could mean that the transmitter inside your car has been damaged. This is usually a matter of the assistance of a professional for repair and will likely require a new key fob.
If you have tried replacing the battery and reprogramming the key fob, but this has not solved the problem it could be that the chip in the key fob may be faulty. This can occur if the key fob has been dropped on hard surfaces and exposed to salt water or even touched by dirty hands.
To identify the issue it is necessary to locate a tiny "key" that is embedded into the seam of the fob that allows you to open it and take out the circuit board. Then, you will be able check for any corrosion or damage on the electronic chip. It is best to use a clean towel to avoid damaging the microchip.
If you aren't sure, you can also check the battery connector terminals for cracks, or breaks. If this is the case you can solder the terminals back into place can usually bring back functionality to the key fob. You can also check the buttons for damage or wear. If the buttons are loose, they can easily be re-soldered and also if the button has actually snapped off.
Interference Signals
There is nothing more frustrating than staring at a "No Fob Detected" message when you attempt to start your car. This typically happens at most inconvenient moments, such as when you're running late for work or when you have to pick up children from school/daycare. The good thing is that there are steps you can follow to resolve the issue and determine what is causing it.
Interference signals can cause the remote key fob not to function in a proper manner. This could be caused by objects like weather conditions, buildings, and transmitters that operate on the same frequency. Interference can occur when your vehicle is equipped with aftermarket equipment that transmits at the same frequency as your key fob.
The key fob may also be damaged if it is exposed to salt water or water. Water can penetrate the rubber seals of the electronic chip, particularly if the key fob is submerged in water for a long time. The chip may cease to function and require replacement of the keyfob. If you have a programable key cleaning the chip with isopropyl alcohol or an electronic cleaner to aid in its come back to normal. If this does nothing, it is likely that the chip is fried and requires replacement.
Locking and Unlocking of Doors
The key fob's buttons send electronic signals to a solenoid within the car. It then converts that signal into a mechanical action that locks and unlocks doors. If the door lock is not working, it could be a solenoid malfunction that requires analysis with the help of a professional auto repair shop.
A low-voltage battery can also prevent the fob from functioning correctly. This can occur if your battery fails to charge or if your contacts get damaged. The good news is that a new battery is able to fix this problem in just minutes.
The receiver module could be the reason why the key fob won't work after you replace the battery or re-program the device. The device interprets radio frequency signals received by the key fob to control the vehicle. It could be a costly repair if the device becomes defective.
To verify if this is correct, place your spare key in the key slot. Then, turn the ignition 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 vehicle and you can then use it as your primary remote for driving. You can program up to three keys this manner.