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Changing the Battery in Your mazda premacy key 3 Key Fob

It's a pain to get in your car at the end of a long, hard day and discover that the key fob is dead. Fortunately, it is an easy fix with a simple battery replacement from an hardware store or a big box retailer.

A spare key fob for your mazda key code 3 is an inexpensive method to avoid having to take it to a dealership to have them re-program your keys.

Battery Replacement

Removing the battery from the Mazda 3 key fob is a simple process that you can do at home. But, you should only replace the battery if it goes out of service, or if the key fob displays a message in the multi-information display that reads, "Low key fob battery. Replace battery."

You'll need a flathead screwdriver and tape and patience to open the case. Find a gap or notch in the bottom portion of the metal of the mazda 2 key not working 3's key fob and insert the head of the screwdriver to cut off the lower part. Repeat the process for the top metal piece however, be careful not to scratch the rubber ring on the bottom of the key fob's case.

Once the fob case is open, you'll see the slot on either side of the case, which houses the battery. Use the tape-wrapped flathead screwdriver to gently pry the case open, starting on one side before moving to the opposite. Remove the old CR2025 and replace it with a brand new one, making sure you place it face-up to ensure proper polarity. Put the cap of the battery on again and attach both sides of your key fob case by pressing until they click.

Now that you've replaced the battery Test the fob to verify that it's working by locking and unlocking your doors. If everything seems to be in good order then your Mazda 3 remote features can be used again.

Pairing Issues

This could be a sign that the transmitter in your car is damaged. It is typically a need for an expert to repair it and may need a new key fob.

If you have tried replacing the battery and reprogramming the key fob, but this isn't solving the issue it could be that the chip in the key fob may be faulty. This can happen if the keyfob has been dropped, exposed to saltwater, or was touched by dirty fingers.

To determine the cause it is necessary to locate a tiny "key" embedded in the edge of the fob that allows you to lift it open and remove the circuit board. You will then be able to look for any corrosion or damage on the chip. It is best to clean the paper towel to avoid damaging the microchip.

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 attaching them back can generally restore the functionality of the key fob. It is also possible to check the buttons for damage or wear. If the buttons are loose, they can easily be re-soldered as well unless the button is actually snapped off.

Interference Signals

There are few things more frustrating than glancing at a "No Fob Detected" message when you attempt to start your vehicle. This usually occurs at the most unpopular moments, such as when you're late for work or when you have to pick up children from daycare/school. There are several things you can do to help figure out what's causing the problem.

Interference signals can cause the remote key fob not to function properly. This can be caused by objects like buildings, weather conditions and transmitters that use the same frequency. Interference could occur if 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 exposed to water or salty water. The rubber seals on the chip's electronic components can be shattered by water, especially when it is submerged for long periods of time like in the ocean or a pool at the beach. The chip may stop working and may require replacement of the keyfob. If you have a programmeable key, you can clean the chip with isopropyl Alcohol or an electronic cleaner to aid in its come back to normal. If this does not 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 the solenoid inside the car that then converts the signal into a mechanical action that locks and unlocks the doors. If the door lock fails to work, it could be an issue with the solenoid. This requires expert auto repair shops to investigate.

A dead 12 volt battery could also stop the fob from functioning properly. This is the case if the battery loses charge or if the contacts are corroded and stop transmitting electricity. This issue can be solved in minutes with a new battery.

If the key fob isn't functioning after you have changed the battery or program it again the problem could be in the receiver module. The device receives radio frequency signals from the key fob and interprets them into controlling the functions of the vehicle. If it fails it could cost a lot to repair.

To determine whether this is the case, begin by inserting the spare key into the key slot and setting the ignition to ON. Press the key fob button two times within 10 seconds, without removing it. The Mazda 3 system synchronizes the key with the vehicle, so you can use it as your primary driving remote. This allows you to program up to three keys.