10 Quick Tips On Mazda 6 Key Fob Changing the Battery in Your Mazda 3 Key Fob

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

A spare key fob for your Mazda 3 is an inexpensive alternative to not having to take your vehicle by a dealership to let them reprogram the keys.

Battery Replacement

The battery replacement in the Mazda 3 key fob is an easy process that can perform at home. However, you should only replace the battery when it dies, or if the key fob displays a message on the multi-information display that reads, "Low key fob battery. Replace battery."

To open the key fob case it requires a tape-wrapped flathead screwdriver and a bit of patience. Put the flathead screwdriver's tip into a notch, or gap in the bottom part of the Mazda 3 key fob to take off the lower portion. Repeat this step for the top metal piece but be careful not to scratch the rubber ring on the bottom of the key fob's case.

Once the fob's case is open, you'll see a slot on either side of the case that houses the battery. Start on the other side of the case, and then gently lift it up. Remove the old CR2025 and replace it with a new one, making sure that you put it on its face to ensure the correct the polarity. Install the cap on the battery again and attach both sides of your key fob case by pressing until they 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 functions for the first time!

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If your key fob has stopped working suddenly it could be a sign that the transmitter inside your car has been damaged. This is usually a matter for a professional, and you will require a brand new key fob.

If you've tried to change the battery and reprogram the key fob but it hasn't worked then the chip in the key fob may be defective. This can happen if the keyfob has been dropped, exposed to saltwater, or was touched by dirty fingers.

You'll need a small "key", which is inserted into the seam to remove the circuit board and determine the problem. Then, you will be able to check for any damage or corrosion on the electronic chip. To prevent damaging the chip, it's recommended to use a clean paper towel.

You can also take a close look at the battery connector terminals to check if they're cracked or broken. If this is the situation then resoldering the terminals into place can usually restore the functionality of the key fob. In the same way, you can examine the buttons to determine if they are worn or damaged. If the buttons are loose, they can be soldered back into position, unless they've physically snapped.

Interference Signals

There are few things more frustrating than staring at the "No Fob Detected" message when trying to start your vehicle. This typically happens at most difficult time, such as the time you're late to work or when you have to pick up children from daycare or school. There are several things you can do to help figure out what's causing the issue.

Interference signals can disrupt the remote key fob signal coming from the vehicle and cause it to not work correctly. This could be caused by objects like weather conditions, buildings, and transmitters that use the same frequency. Interference could also occur if you have aftermarket equipment installed in the vehicle that transmits at the same frequency as the key fob.

The key fob may also be damaged if exposed to salt water or water. The rubber seals on the electronic chip could be penetrated by water, particularly in the event that it is submerged for long periods of time, like in a pool or at the beach. The chip may cease to function and require replacement of the keyfob. If you have a key that has the ability to be programmed and cleaned with isopropyl or electronic cleaners to bring it back to its original functionality. If this doesn't work, the chip is likely to be fried and will require to be replaced.

Locking or Unlocking the Doors

The buttons on the key fob transmit electronic signals to the solenoid in the car, which then transforms the signal into mechanical action. This locks and unlocks doors. If your door lock does not work it could be because of an issue with the solenoid. This requires expert auto repair shops to investigate.

A dead 12 volt battery can hinder the fob from functioning correctly. This happens when the battery is unable to charge or if the contactors become corroded, and stop transferring electricity. The problem can be addressed in just a few minutes by purchasing a new battery.

If the key fob doesn't work after changing the battery or try to reprogram it then the problem may 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 malfunctions it could cost a lot to fix.

To test if this is true, insert your spare key into the key slot. Then, turn the ignition on. Press the key fob twice in 10 seconds, without taking it out. The Mazda 3 system will now sync the key to the vehicle and you can then use it as your primary remote for driving. This allows you to program up to three keys.