15 Things You're Not Sure Of About Mazda Key Fob Replacement How to Replace a Dead Mazda 5 Key Fob

There are plenty of great features that come with your Mazda 5 key fob. Some of these improve safety or performance, while others help make driving around East Stroudsburg, Brodheadsville, and Saylorsville more enjoyable.

One of these useful features is the remote start system. If you're having trouble starting your vehicle it could be time to replace the battery in your key fob.

What is a keyfob?

A key fob can be used as a remote control to unlock and start your car without the need to insert a metal ignition key. It is a small device that has a microchip on which information such as an unique ID is stored as well as an antenna that can be used for sending and receiving signals. The microchip communicates through radio frequencies with the receiver inside your vehicle. These signals are a type of near-field communication (NFC) which allows for contactless payment and other features that require proximity.

Based on the type of key fob you own the system will have different features. For instance, certain systems will keep a log of who used the key and the time, which can be significant in stopping criminal activity. There are additional security measures that can be added to the system, such as keys that are encrypted, making it impossible to copy them. Prox cards are extremely popular for fobs and are also known as 125khz (or 26-bit) or proximity cards.

It is always advisable to have a spare car key fob in case your original is stolen or lost. Many automakers let you program another key fob, which can be useful and cost-effective. It is important to keep in mind that the procedure varies from one manufacturer to the next and can be a bit complicated. It is possible to conduct some research to find proper instructions and steps. But, it's important to have a reliable key fob that can assist you in reaching your destination in a safe manner.

How do I open a key fob

It's a hassle to discover that your Mazda key fob doesn't work. It doesn't matter if you're getting ready for your day at work or returning home from an exciting afternoon at EAA Airventure, a dead key fob's battery can affect your plans.

Luckily, changing the battery in your key fob is simple and can be done at home using just a few tools. The Service team at Holiday Mazda has put together this helpful guide on how to open the key fob and replace the battery.


To start, push the button for the auxiliary key on the back of your key fob to remove the auxiliary key made of steel. After the key is removed, you will see the slots on either side of the case. Carefully pry the case open using a tape-wrapped screwdriver. It should break easily without damaging the rubber ring under the battery.

After the battery is exposed, remove it and place it in a location where you will not forget it. Then, put the new battery in its new location, making sure that the positive (+) side of the battery is facing upwards. Close the case after the new battery has been installed, ensuring that both sides snap in place. Then you can use your Mazda keyfob once more.

What's the battery for a key fob?

Button cells are the most commonly used type of battery used in key fobs. These batteries are available at home improvement centers, and some auto parts stores. mazda key fob is important to get the correct battery size for your key fob as different battery sizes have varying discharge characteristics that can impact how well your key fob performs.

You can usually tell when the battery in your key fob is dying by pressing the buttons and watching the LED light. If the light does not turn on it means the battery is dead. It is time to get it replaced. You can also test the battery using a voltmeter to determine what voltage it's running at. A fully charged key fob battery should be reading around 3 Volts. If the battery shows less than this, it is at a low level and needs to be replaced.

The first step to replace the battery is to open up your key fob and find the notch that divides it into two halves. You can use a screwdriver, a knife, or even your fingers to push into the notch and wedge the halves apart. When the halves are separated then look for a screw that is seated in the back of the key fob and loosen it. Make sure you keep the screw in a safe place, such as a sealable bag or cup in order to avoid losing it.

How to replace the battery on a key fob?

Key fobs attach to the key ring. It has buttons that can be used to lock or unlock your car and even remotely start it (one of their many uses). The fob transmits an electronic signal that allows the car to do this. However these signals are powered by battery power. If the battery goes out or is damaged, your Mazda will not be able perform any action, and that can be a huge disappointment. Luckily, it's fairly simple to replace the battery on the form of a key fob.

The first step in opening the key fob is to insert the tip of the screwdriver in the seam where the two halves snap together. There is usually a notch in the seam, which makes tearing the halves apart simpler.

After opening the case, gently pull on the key blade to release the battery. The new CR2025 should be inserted into the case, making sure the plus side is facing upwards. Once the new battery has been installed take off the black cover piece and slide the blade into place.

This is a quick and simple process that can be completed at home in Springfield The steps will differ based on your model year and key fob style. The team at Eich is always ready to answer any questions you might have.