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How to Reprogram a Mazda Key Fob
Mazda key fobs allow you to control a number of functions without the physical key in hand. When they are working they can be quite cool.
When you press a button on your key fob it sends a signal to the receiver unit inside the car. The receiver unit then encrypts the signal and, if all is in order, it performs the function you want.
Programming
Modern key fobs are complex and difficult to comprehend. They let you lock and unlock your car from a distance, and they're also very secure due to the way in which the signal between them and your car is encrypted. It's difficult to believe that such a small thing can control your entire vehicle, but it is the truth.
The key fob is outfitted with a transponder that uses radio waves to wirelessly communicate with the receiver of your vehicle. When you press a button on the key fob, it will send an exclusive code that matches with the car's receiver. This lets the key fob transmit the signal without being detected by someone else and therefore cannot be used to start your vehicle.
A Mazda key fob is actually two things it's a key module, and a remote control. You'll have to program both parts of the key fob if you wish to start your vehicle. It's a simple process however you'll require a few tools.

You'll first have to take off the key fob's metal case. There should be a slot either side of the case. Start with one side of the case and move to the other side using the tape-wrapped flathead. Be gentle to avoid scratching the case.
Reprograming
Key fobs are tiny remote can be used to lock and unlock your Mazda vehicle. They can also be used to start your car if it's fitted with the option. They're extremely useful, but can be easily lost. You should know how to program your Mazda key fob in case you lose it.
The way a Mazda key fob works is based on radio frequency. The signal the key fob transmits is encrypted, so it's secure from any unauthorized users. If the signal is intercepted, your vehicle will not start.
To reprogram the Mazda key fob, you'll need have two functioning keys. If you don't have an extra key, you'll need bring it to a dealer to be reprogrammed. You'll require the code that's stamped on the plate that is attached to the key set. This number should be noted down and stored in a secure location.
To start, insert the first working key into the slot, and turn the ignition to the ON position. Remove the key after about five minutes. Repeat the process with the second key that is working. Once the key has been programmed, it can be used in your Mazda. Make mazda replacement keys to test it before putting it away.
Replacement
The modern-day key fobs today do more than unlock and start your car. They also serve as convenience features and a significant crime deterrent. However, these additional capabilities come with a price when your key fob dies it is possible to go to the dealer and shell out hundreds of dollars.
Depending on the car manufacturer certain drivers can reprogram their key fobs. However, the procedure differs from one manufacturer to the next. Owner's manuals should have specific instructions for each model. You should also consider keeping an extra remote in your glove box or the center console, as many used car buyers will pay more if you have two working key fobs.
Certain key fobs, as well as locking and unlocking your car, can also roll down the windows with a single push of a switch. This is particularly helpful on a hot day or when you want to let your car breathe before stepping into it. The fob can be used to call your car or auto-park it, which is useful if you are in an awkward spot.
If your key fob is running out of battery, you'll likely receive a warning message on your dashboard. It's a good idea replace the battery. Take off the key for the metal fob and note the tiny slots on either side of case. Make use of a tape-wrapped flathead screwdriver open the case by gently opening it, starting on one side and then the other. You don't want to damage the plastic tab that opens the case. Otherwise, it'll be difficult to put the case back to its original position.
Disassembly
Mazda's modern vehicles offer a variety of advantages to their owners. One of them is key fobs that enable you to unlock your doors remotely, and even start your vehicle. However, as with any device powered by batteries, these key fobs may wear out with time. This is why it's crucial to know how to change your Mazda fob's key fob battery. The process is easy and quick. It's also inexpensive. Plus, you don't have to go to the dealership service center in Eagan.
The first step in this DIY Mazda key fob battery replacement process is to take the metal plate from the front of the case. The metal plate has a code that is stamped on it. It is recommended to keep it in a secure place but not inside your vehicle.
Then you can use a tape-wrapped flathead screwdriver to open the case, starting with one side before moving to the next. Be gentle to avoid damage. After the case is removed, take the battery out. Be careful not to scratch any rubber rings on which the battery is placed on.
After removing the battery, replace it with a new one, and then snap it into the case. Replace the rubber ring as needed. These batteries can be found at your local Rio Rancho hardware store or auto parts stores or buy them online at our University Mazda parts department.