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How to Replace a Dead Mazda 5 Key Fob There are plenty of amazing features that come with your Mazda 5 key fob. Some of them improve the performance or safety of your vehicle, whereas others make driving around East Stroudsburg, Brodheadsville, and Saylorsville easier. Remote start is one of the most useful features. If you have trouble starting your car It could be time to replace the battery on your keyfob. What is a keyfob? A key fob is a remote control that allows you open and start your vehicle without having to insert a key of metal in the ignition. It is a small device that has a microchip on which information such as an ID number is stored as well as an antenna to send and receiving signals. The microchip transmits radio frequencies with the receiver inside your vehicle. These signals are a type of near-field communication (NFC) that allows payment via contactless, as well as other features that require proximity. Depending on your key fob's model, it will have different capabilities. Certain systems, like, keep a record of who came into the building and when. This can be extremely useful in preventing crime. Security measures can also be included with encrypted keys, which make it harder to copy. Prox cards are an extremely popular fob and are also called 125khz cards, 26-bit prox or proximity fobs. You should always carry an extra car key fob in case your original is stolen or lost. Many automakers allow you to program another key fob, which can be useful and cost-effective. It is important to keep in mind that the procedure differs from one manufacturer to another and can be a bit complicated. It may take some digging to determine the correct instructions and steps, but it's well worth it to have a more reliable key fob that can help you reach your destination in safety. How do you open a key fob It is frustrating to find that your Mazda key fob won't unlock. Whether you're getting ready for your day at work or coming home from an adventure-filled afternoon at EAA Airventure, a dead key fob battery could put a damper on your plans. Fortunately, replacing the battery on your key fob is simple and can be accomplished at home using just the right tools. The service team at Holiday Mazda has put together this useful guide on how to open the key fob, and then replace the battery. To start, push the button for the auxiliary key on the back of your key fob in order to remove the auxiliary key made of steel. After removing the auxiliary key, you will see an opening on either side of the case. Utilizing the tape-wrapped flathead screwdriver gently pry open the case. It should be able to come apart without damaging the rubber ring beneath which the battery sits. Once the battery has been exposed, remove it and place it somewhere you won't forget about it. Then, place the new battery in its spot, making sure that the positive (+) side of the battery is facing up. After the battery is in place, close the case, making sure that both sides snap into place. Now you can use your Mazda keyfob once more. What's the battery in a key fob? Most key fobs use small, coin-shaped batteries called button cells. These batteries are available in general stores, home improvement stores, and some auto part stores. It is important to choose the correct size battery for your keyfob. Different battery sizes have different discharge characteristics which could affect how your keyfob functions. Most times you can determine if your fob battery is dead by pressing any buttons on it and then looking at the LED light that illuminates. If the LED light does not start to blink, it means that the battery is depleted and needs to be replaced. You can also use a voltmeter on the battery to check its voltage. mazda 3 key fob replacement charged key fob battery should read around 3 Volts. If the battery reads less than that, it is low and should be replaced. To replace the battery, you must first unlock your key fob. Find the notch which separates the two halves. You can use a screwdriver an ax, or your finger to push into this notch and wedge the halves apart. After the two halves have been separated, remove the screw that is holding the key fob on the back. Keep the screw in a safe location such as a resealable container or bag to prevent losing it. How do you replace a key fob's battery? Key fobs attach to the key ring and has buttons that can be used to lock or unlock your car, and even remotely start it (one of their many secret uses). The fob transmits wireless signals that allow the car to do this. However, these signals are powered by battery power. Your Mazda is unable to operate should the battery fail. This can be a huge inconvenience. It's easy to replace the key fob battery. The first step is to open the key fob by pushing the tip of a screwdriver into the gap where the two halves snap together. There is often a notch in the seam, which makes pulling the halves apart more simple. After you've opened the case, remove the old battery by gently pulling on the key blade until it triggers a tab, and is pulled out of the way. Push the new CR2025 into the case, making sure the plus side is facing upwards. Once the new battery has been installed replace the black cover piece and slide the blade into position. It's a quick and simple process that can be done at your home in Springfield The steps will differ based on your model year and key fob model. If you have any questions, the team at Eich Mazda is always there to help!