The Three Greatest Moments In Mazda 6 Key Fob History Changing the Battery in Your Mazda 3 Key Fob

It's frustrating to drive off at the end of a long workday and discover that the key fob is dead. This is a straightforward 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 be towed by a dealership to let them re-program your keys.

Battery Replacement

Removing the battery from your Mazda 3 key fob is an easy task that you can do at home. But, it is best to replace the battery if it fails, or when the key fob displays a message on the multi-information display, "Low key fob battery. Replace battery."

To open the key fob's case you'll need a tape-wrapped flathead screwdriver, along with some patience. Insert the head of the flathead screwdriver into a notch, or gap on the bottom metal of the Mazda 3 key fob to remove the lower part. Repeat the process for the top metal piece, but be sure not to damage the rubber ring that is on the bottom of the case.

Once the fob's case is open, you'll see a slot on either side of the case that houses the battery. Make use of the tape-wrapped flathead screwdriver to gently the case open, starting with one side and moving to the other. Remove the battery that was used and place in a new CR2025 to ensure that it's face-up for proper orientation. Install the cap on the battery again and secure both sides of your key fob case by pressing until they click.

Once you've replaced your battery Check the fob to verify that it functions by locking and unlocking your doors. If everything is in order then you're able to use your Mazda 3's remote capabilities for the first time!


Pairing Issues

This could mean that the transmitter in your car is damaged. It is typically a need for the assistance of a professional for repair and will likely require a new key fob.

If you've tried replacing the battery and reprogramming the key fob, but this has not solved the problem it is possible that the chip in the key fob might be defective. This can occur if the key fob has been dropped on hard surfaces, exposed to salt water or even touched by dirty hands.

To determine the cause of the issue You will need to locate a small "key" located in the edge of the fob that lets you open it up and remove the circuit board. Then, you will be able to check for any damage or corrosion on the chip. It is recommended to use a clean towel to ensure that the chip is not damaged.

If you aren't sure then you should also examine the battery connector's terminals for cracks or breakage. If this is the situation, soldering the terminals back to their place will usually bring back functionality to the key fob. You can also check the buttons for wear or damage. If the buttons are loose, they can be soldered back to their original position unless they have physically snapped.

Interference Signals

There are few things more frustrating than trying to get the engine started in your car only to see the message "No Fob Detected". It happens at the worst occasions, such as when you're late to work or have to pick up your children from daycare/school. The good thing is that there are a few steps you can take to pinpoint the issue and figure out the root of the problem.

Interference signals can interfere with the remote key fob signal from the vehicle which causes it to not function correctly. This could be caused by things such as weather conditions, buildings, and transmitters that use the same frequency. Interference may 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 it is exposed to water or salty water. Water can damage the rubber seals of the electronic chip, especially when the key fob is submerged in water for a long time. The chip can stop working and may require replacement of the keyfob. If you own a programmable key you can clean the chip with isopropyl Alcohol or an electronic cleaner to help it get back to its original functionality. 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 key fob's buttons send electronic signals to a solenoid within the car. It then converts the signal into a mechanical action that locks and unlocks doors. If your door lock does not work it could be due to an issue with the solenoid. This will require professionals from auto repair shops to examine.

A dead 12 volt could also hinder the fob from working properly. This is the case if the battery is unable to charge, or if the contacts get corroded and stop transferring electricity. The good news is that a new battery is able to fix this issue in just minutes.

The receiver module may be the problem if the key fob won't work after replacing batteries or reprogram the device. This device interprets radio frequency signals transmitted by the key fob to control the vehicle. It could be expensive to repair if the device becomes defective.

To determine if this is the case, begin by inserting your spare keys into the key slot and turning the ignition to ON. Press the key fob two times for 10 seconds without removing it. The Mazda 3 system synchronizes the key to the vehicle and you can now use it as your primary remote for driving. mazda 2 key can program up to three keys in this manner.