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How to Add, Change, and Reprogram a Mazda 3 Spare Key

It's a good idea always to have an extra key in your pocket in case you lose your keyfob or it was unable to function. This article will explain everything you need to learn about changing, adding, and reprogramming your Mazda 3 key fobs.

A word of caution: some keys require programming by a locksmith professional or dealer, whereas other keys don't. Make sure to use genuine Mazda replacements for your key fob.

How do I add a spare key?

You can also add another key in the event that you don't have a spare key available or if you accidentally damage the one you have. To accomplish this, you'll need a small screwdriver with a flat head and a new CR2025 battery. Once you've got these tools and are ready to open up the key fob and replace the battery. Locate the key release auxiliary. It's located under the metal part and is easy to find. Once you hit the button, the cover should be removed immediately. Then, place the screwdriver's head in the notch on top or in the space, and take the metal part away.

Once the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition ON and wait for about five seconds, then set it to off. This will register the new key's details to the system, allowing it to start your vehicle in the future.

You can only program three keys in your Mazda 3. The one thing you don't want is to have more than two functioning key fobs, and not be in a position to get your vehicle started. This is a safeguard to stop unauthorized users from activating your key fobs and starting your car.

How to reprogram an unrepaired key

If you have a spare key, it's best to know how to program it in the event your original key gets lost or stolen. This will stop unauthorized persons from starting your car or taking it. This procedure should work with any Mazda but you'll need two keys that work to begin the process of reprogramming. If you don't have two working keys, you'll need bring your vehicle to the dealership to get it done.

Begin by stepping into the driver's position and closing all the doors except the one that is open. Insert the first working key into the slot, and then turn the ignition to ON. For five seconds, remove the key and repeat the process with the second key.

After you've completed programming your new key, you'll have three working keys that you can use to start your vehicle in the future. Before you store each key, make sure it's working properly.

You should consider buying a spare Mazda 3 remote, especially in cases where your car is prone to problems. It's possible to find one on the internet or at your local automotive store, but make sure to read the reviews before buying so that you can avoid purchasing the wrong key fob compatible with your vehicle.

How to change the Battery on a spare key

There's nothing worse than discovering that the battery for your key fob has died and you can't unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button located on the back of the key fob. This will release the metal key that is used as an auxiliary key, and expose an opening on both sides of the case. Put the flathead screwdriver in one of these slots and gently break the two sides of the case. When the battery is completely exposed, remove it and put it away somewhere you won't forget it.

Be sure to have a replacement battery prior to starting. They can be bought from any store that sells batteries or from a mazda 6 key dealer in Winter Garden. Using the right type of battery will ensure that your key fob operates perfectly.

Then, put the new battery in the correct place and replace the cap on the battery. Be careful not to scratch the rubber ring on which the battery rests. Finally, press the two parts of the key fob until you hear the sound of clicking.

How to Reset the system's Keyless Entry System

The key fob inside your Mazda 3 is not only an option for convenience, it's an important security feature. If you lose your key or had it stolen the car won't start even if you have the spare fob. The key fob needs to be reprogrammed by the dealer to make it work again. This can be a painful and costly ordeal. Therefore, it's best to learn how to reset the system.

Remove the battery from the system for 15 minutes. This will take out any remaining electricity from the onboard computer. Then, disconnect the connectors for the LF-ECU and the demand mazda 3 Spare key switch connectors. After that, test for continuity between the following terminals:

Insert the key into the slot, and switch on the ignition. Put the key in for around five seconds, and then turn it off. The key's information is added to the computer in your car and the new fob will start your car. You can program as many fobs you want but only one can be utilized at any particular time. This will prevent unauthorized people from stealing your key and getting access to your vehicle. You can purchase a new keyfob on the internet, but it still needs to be cut and programmed by a dealer.