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How to Replace a Dead Mazda 5 Key Fob Your Mazda 5 key fob has many wonderful features. Some of these improve the safety or performance of your vehicle, while others allow you to travel around East Stroudsburg, Brodheadsville, and Saylorsville easier. Remote start is among the most convenient features. If you're having difficulty getting your car started, it may be time to replace the battery on your keyfob. What is an important key fob? A key fob is a remote control that allows you unlock and start your car without the need to insert a key made of metal into the ignition. mazda 2 car key is a small device with a microchip that contains information like a unique ID is stored, as well as an antenna that can be used for sending and receiving signals. The microchip communicates with the receiver in your car using radio frequencies. These signals are part of near-field communications (NFC) which allow for contactless payment, as well as other features that require proximity. Depending on your key fob's type, it will have different capabilities. Certain systems, like, keep a record of who came into the building and when. This can be very helpful in preventing crimes. There are also security measures that can be added, like encrypted keys that make it impossible to copy them. Prox cards are very popular as fobs and are also referred to as 125khz, 26-bit, or proximity cards. You should always have a spare car key fob in the event that your original is stolen or lost. A lot of automakers permit you to self-program an additional key fob which can be useful and cost-effective. But it's important to keep in mind that the procedure can differ from manufacturer to manufacturer and isn't always straightforward. It may take some digging to determine the correct instructions and steps, but it's well worth it to have a better key fob to help you reach your destination in safety. How to open a key fob It's a hassle to discover that your Mazda key fob won't unlock. When you're getting ready for your day at work or returning home after an exciting afternoon at EAA Airventure, a dead key fob battery can really make a mess of your plans. Luckily, changing your key fob battery is simple and can be done at home, using only few tools. Holiday Mazda's Service team has put together this guide to assist you in opening the keyfob and replace batteries. Press the auxiliary button located on the backside of the key fob to take off the auxiliary metal. After removing the key, you will find an opening on either side of the case. With a tape-wrapped flathead screwdriver, gently open the case. It should fall apart easily without damaging the rubber ring beneath which the battery rests. When the battery is exposed remove the old one out and put it away in a location where you'll not forget about it. Then, place the new battery in its new location, making sure that the positive (+) side of the battery is facing up. Once the new battery is in place, close up the case, making sure that both sides snap into the correct position. You can now use your Mazda keyfob again. What's the battery inside the key fob? Most key fobs use tiny, coin-shaped batteries referred to as button cells. They are readily available at home improvement stores, as well as certain auto parts stores. It is important to choose the correct size battery for your keyfob. Different sizes of batteries have different discharge characteristics which could affect how your keyfob functions. Most of the time you can tell whether the fob battery is dead by pressing any button on it, and then looking at the light source that is lit by the LED. If the LED light does not turn on, the battery is dead. It must be replaced. You can also use a voltmeter to the battery to determine its voltage. A fully charged key fob should show around 3 Volts. If the battery shows less than 3 Volts, it is considered to be low and should be replaced. The first step in replacing the battery is to remove your key fob, and then locate the notch that splits it into two halves. You can use your finger or a screwdriver, or a knife to push the two halves. Once the halves are separated, remove the screw that is holding the key fob in the back. Make sure you save the screw in a secure place, such as a sealable cup or bag to prevent it from being lost. How do you replace the battery on a key fob Key fobs are tiny device that can be attached to your key ring, with buttons that allow you to lock and unlock your car and even start it remotely (one of the many possible uses for these devices). The fob transmits wireless signals that allow the car to perform this. However these signals are powered by batteries. If the battery fails then your Mazda will not be able to perform any action and that could be a huge disappointment. Fortunately, it's pretty easy to replace the battery with a key fob. The first step is opening the key fob by pressing the tip of a screwdriver into the gap where the two halves snap together. This seam usually has an notch that makes it easier to pull the two halves apart. After you have opened the case, take out the old battery by gently pulling the key blade until it triggers a tab, and is pulled out of the way. The new CR2025 should be inserted into the case, making sure that the plus side is facing upwards. Once the new battery is in place, slide the black cover piece back on and then slide the key blade into place. This is a fast and simple process which can be carried out at your home in Springfield but the steps will differ depending on your model year and key fob design. If you have any questions, the team at Eich Mazda is always here to help!