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Changing the Battery in Your Mazda 3 Key Fob
It is frustrating to drive off at the conclusion of a long and tiring day and find that the key fob is dead. This is a straightforward fix that is easily done at a major box retailer or hardware store.
Incorporating a spare key fob to your Mazda 3 can be an affordable way to keep yourself from having to be towed to the dealership and having them re-program your keys.
Changing the battery in your Mazda 3 key fob is an easy task that you can perform at home. It is recommended to replace it if the battery fails or you see a message reading "Low keyfob battery" on the multi-information display. Replace battery."
You'll need to use an flathead screwdriver along with tape and patience to open the case. Locate a notch or gap in the bottom metal part of your Mazda 3's key fob and then insert the tip of the screwdriver into it to remove the lower part. Repeat this procedure for the top metal piece Be careful not to damage the rubber ring at bottom of the key fob's case.
You'll find a slot on each side of the case that houses the battery. Make use of the tape-wrapped flathead screwdriver to gently pry open the case, starting with one side and moving to the other. Remove the battery that was used and place in the new CR2025, making sure that it's in the right orientation for proper orientation. Finally, place the cap of the battery back on and then reattach both sides of the key fob case, pressing until you hear them click.
After replacing the battery, lock and unlock your doors to ensure that the fob works. If everything appears to be working then you're able to use the Mazda 3's remote features to drive again!
Pairing Issues
If your key fob stop working suddenly it could be because the transmitter inside your car is damaged. It is typically a need for the assistance of a professional for repair and will likely require a new replacement key fob.
If you've tried replacing the battery and reprogramme the key fob but it hasn't worked, the chip inside the key fob might be defective. This could happen if the keyfob has been dropped, exposed to saltwater, or touched by dirty fingers.
You'll need the tiny "key", which is inserted into the seam, to take off the circuit board and determine the problem. Then, you can check the electronic chip for corrosion or damage. It is best to clean the paper towel to ensure that the chip is not damaged.
You can also examine the battery connector's terminals and see if they are cracked or broken. If this is the case it is possible to solder the terminals back into place can usually restore functionality to the key fob. You can also check the buttons for wear or damage. If the buttons are loose, they can easily be soldered back in place as well unless the button is physically snapped off.
Interference Signals
There are few things more frustrating than trying to get the engine started in your vehicle and getting the message "No Fob Detected". This usually occurs at the most awkward time, such as when you are late for work or picking up children from school/daycare. There are some things you could do to troubleshoot and find out what's causing the problem.
Interference signals can cause the remote key fob not to function properly. This can be caused from things like weather conditions, buildings and transmitters that operate on the same frequency. Interference may occur if your vehicle has aftermarket equipment that transmits at the same frequency as your key fob.
The key fob might be damaged if it is exposed to salt water or water. Water can get into the rubber seals of the electronic chip particularly when the key fob has been submerged in water for a prolonged duration. This can cause the chip's function to cease and require replacement of the key fob. If you have a programable key it is possible to clean the chip with isopropyl Alcohol or an electronic cleaner to help it come back to normal. If this doesn't help then it's likely that the chip has fried and must be replaced.
Locking and Unlocking of Doors
The buttons on the key fob send electronic signals to the solenoid of the car, which transforms the signal into mechanical action. This locks and unlocks doors. If the door lock is not functioning, the issue could be a solenoid issue that requires investigation with the help of an expert repair shop for autos.
A dead 12 volt battery could also stop the fob from functioning correctly. This can occur if your battery loses its charge or if your contacts get damaged. The good news is that a new battery is able to solve this issue in only minutes.
The receiver module may be the problem if the key fob does not function after you replace the battery or program the device. The device receives radio frequency signals from the key fob and interprets them into controlling the functions of the vehicle. If it breaks down, it can be expensive to repair.
To determine if this is true, insert your spare key in the key slot. Then, turn the ignition on. Press the key fob twice within 10 seconds, but without taking it out. The Mazda 3 system will now synchronize the key with the car and allow you to use it as your primary remote for driving. You can program up to three keys this way.