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How to Reprogram a Mazda Key Fob Mazda offers key fobs that let users to control many functions without the key itself in your hand. When they are working, they can be really cool. When you press the button on your key fob, it transmits a message to the receiver unit in the car. The receiver unit decrypts and then checks the signal. If everything is okay it will perform the desired action. Programming Modern key fobs are very complex and difficult to understand. They allow you to lock and unlock your vehicle from a distance. The signal between the key fob and your car is encrypted, making it very secure. You might have a hard to believe that it's possible for something that small to control your entire car, but it's true. The key fob is equipped with a transponder that makes use of radio waves to communicate wirelessly with the receiver of your vehicle. When you press the key fob, it sends out a unique code that matches with the car's receiver. This lets the key fob transmit the signal, without being recognized by anyone else thus it can't be used to start your car. A Mazda key fob actually consists of two things: a key module and remote control. If you'd like to be capable of starting your car, you'll need to program the key fob. It's a simple process but you'll require some tools. First, you'll need to remove the key fob's metal case. After that there should be a slot on either side of the key fob case. Start with one side of the case, and work your way to the other using the tape-wrapped flathead. Avoid scratching the case by being gentle. Reprograming A Mazda key fob is a remote control that can be used to lock or unlock the vehicle. If your vehicle has this feature it can also be used to start the car. They are very useful but they can easily be lost. You must know how to program your Mazda key fob in case you have lost it. Radio frequency signals are the base of how Mazda key fobs work. The signal transmitted by the key fob is encrypted to shield it from any unauthorized users. If someone intercepts the signal it won't be able to start your vehicle. To reprogram a Mazda key fob, you'll need to have two functioning keys. If you don't have a spare, you'll have bring it to a dealer for reprogramming. It is also necessary to know the code number that's printed on the metal plate attached to the key set. Note this number down and store it in a safe place. Begin by inserting the initial key into the slot. Then, turn the ignition ON. Then, leave it in for around five seconds before removing the key. Repeat the process with another key that functions. Once the new key is programmed, you can start using it in your Mazda vehicle. Make sure you check it out prior to putting it away. Replacement The latest and high-tech key fobs available today do more than just unlock your vehicle and allow it to start. They also serve as a convenience feature as well as a deterrent to theft. However, those additional features come at a cost when your key fob fails and you need to go to the dealer and shell out hundreds of dollars. Certain car manufacturers permit drivers to reprogram their key fobs on their own, but the process may differ. Owner's manuals contain specific instructions for each model. It is also worth keeping an additional remote in your glove box or center console, since many used-car buyers will pay more if you have two working key fobs. In addition to locking and unlocking, some of the latest key fobs also have the ability to roll down windows with the press of one button. This is particularly useful on a hot day or when you want to let air out of your car before getting in. The fob can be used to call your car or auto-park it, which is helpful if you are in an unfriendly spot. You'll probably see a message on your dashboard in the event that your key-fob has no battery. It's a good idea to replace the battery. Take the key in metal off the fob and take note of there is a small hole on either side of the case. Use a tape-wrapped flathead screwdriver pry the case open by gently opening it, starting on one side, and then on the other side. It is important not to damage the tab made of plastic that opens the case. Otherwise, mazda replacement keys 'll be difficult to put the case back to its original position. Disassembly Mazda's modern vehicles provide a lot of features that make their owners happy. One of these is key fobs that let you open your doors remotely and to start your vehicle. The fobs, as with all other devices powered by batteries, will wear out with time. That's why it's vital to know how to change your Mazda key fob battery. It's simple cheap, quick, and easy. You can also do it yourself and not have to go to an auto dealership service center in Eagan. The first step in this DIY Mazda key fob battery replacement procedure is to take the metal plate from the front of the case. It has a code engraved on it that you should keep in a secure place, but not in the vehicle. Next take a tape-wrapped flathead screwdriver to break open the case starting with one side before moving to the next. To avoid damaging the case the case, work with care. After the case has been removed, take the battery out. Be careful not to scratch any rubber rings that the battery sits on. After you have removed the old battery then replace it with a new one and then snap it onto the case. Take a close look at the rubber ring that it is placed, and then replace it if you need to. These batteries can be bought at your local Rio Rancho auto parts or hardware store, or online through our University Mazda parts department.