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Changing the Battery in Your Mazda 3 Key Fob It can be a bit frustrating to get into your car at the end of a long, hard day and discover that your key fob is dead. This is a simple fix that is easily done at a major box retailer or at a hardware store. A spare key fob for your Mazda 3 is an inexpensive way to avoid having to take your vehicle to a dealership to have them re-program the keys. Battery Replacement
To open the case of your key fob, you'll need a tape-wrapped flathead screwdriver, along with some patience. Locate a notch or gap in the bottom of the metal part of your Mazda 3's key fob and then insert the head of the screwdriver in it to break off the lower half. Repeat the process for the top metal piece Be careful not to scratch the rubber ring on the bottom of the case. There is a slot on each side of the case, where you can find the battery. Start on the opposite side of the case, and then gently push it open. Remove the battery that was used and place in the new CR2025 and make sure it's facing up to ensure proper polarity. Then, put the cap of the battery back on and reconnect both sides of the key fob's case, pressing until you can hear them click. After replacing the battery After replacing the battery, lock and unlock your doors to test that the fob works. If everything appears to be working then your Mazda 3 remote features can be used again. Pairing Issues If your key fob stops working suddenly it could be a sign that the transmitter inside the car has been damaged. It is usually a job that requires a professional. You will require a new key fob. If you've attempted to replace the battery and reprogram the key fob, but it hasn't worked, the chip inside the key fob could be defective. This can happen if the keyfob has been dropped, exposed to saltwater, or touched by dirty fingers. To identify the issue, you will need to locate a tiny "key" built into the fob's seam which allows you to lift it open and take out the circuit board. You can then examine the chip for corrosion or damage. It is recommended to use a clean, dry paper towel to ensure that the chip is not damaged. It is also possible to take a closer look at the battery connector's terminals and see if they are cracked or broken. If this is the case, then carefully connecting them back can often 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 resoldered to their original position unless they have physically snapped. Interference Signals There are few things more frustrating than looking at a "No Fob Detected" message when you attempt to start your car. This typically happens at most unpopular time, such as when you are late for work or when you have to pick up children from daycare/school. There are some things you could try to figure out the root of the issue. Interference signals can cause the remote key fob not to function in a proper manner. This can be caused from objects such as weather conditions, buildings, and transmitters that operate on the same frequency. https://www.thekeylab.co.uk/mazda-car-keys/ can also occur when you have an aftermarket device installed in the vehicle that transmits on the same frequency as the key fob. The key fob may also be damaged if it is exposed to water or salty water. Water can penetrate the rubber seals of the electronic chip especially if the key fob is submerged in water for a lengthy time. This could cause the chip's function to cease and require replacement of the key fob. If you have a key that can be programmed and cleaned with isopropyl and electronic cleaners to bring it back to its original function. If this doesn't work the chip, it's likely to be damaged and will need to be replaced. Locking and Unlocking the Doors The buttons on the key fob transmit electronic signals to a solenoid within the car. It transforms the signal into a mechanical action that locks and unlocks the doors. If the door lock doesn't work it could be because of an issue with the solenoid. This requires professional auto repair shops to examine. A dead 12 volt battery could cause the fob to stop functioning properly. This could happen if the battery is unable to charge or if the contacts become corroded and stop conducting electricity. This issue can be solved in a matter of minutes by replacing the battery. The receiver module could be the cause if the key fob won't work after you replace the battery or program the device. This device receives radio frequency signals from the key fob and interprets them into controlling the functions of the vehicle. It can be expensive to repair if it malfunctions. To determine if this is the case, start by inserting the spare key into the key slot and turning the ignition to ON. Press the key fob twice in a matter of 10 seconds without removing it. The Mazda 3 system will now be able to synchronize the key with your car and allow you to use it as your primary remote for driving. You can program up to three keys this manner. |
