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

It's a good idea to have an extra key in your pocket in case you lose the keyfob you were using or it stopped working. This article will teach you how to add, modify or reprogramme your Mazda 3 keyfobs.

Note: Some keys require programming from professional locksmiths, while others don't. Use only genuine mazda key fobs replacements to replace your key fob.

How to add an additional key

You can add an additional key if you don't have a spare key or in the event that you break the one you have. You'll need the flathead screwdriver, as well as an CR2025 battery. Once you have the items you need, it's time to open the key fob. First look for the auxiliary key release button. It's located underneath the metal piece and is easy to find. The back cover should come off when you press the button. Then, put the screwdriver's head in the notch at the top or in the space, and Mazda 3 Key take the metal part away.

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

It is only possible to program three keys into your Mazda 3. You don't want to use more than two key fobs in order to start your vehicle. This is a safeguard to stop unauthorized users from activating your keys and starting your vehicle.

How do you reprogram a spare key?

It's smart to be aware of how to reprogram a spare key in the event that your original key becomes lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This will work with any Mazda. You will need two keys that are working for the reprogramming to begin. If you don't have two working keys then it's best to bring your Mazda to a dealer to get this completed.

Begin by stepping into the driver's position, and shutting all doors, with the exception of the one that is open. Turn the ignition on and insert the first working key. After five seconds, remove the key and repeat the process with a second working key.

After you've programmed your new key, you should have three keys that you can use to start your vehicle in the future. Test each key to ensure sure they're working correctly before placing them away.

It's a good idea buy an extra Mazda 3 key fob, especially if your car is one who frequently loses their key or has other issues with it. You can find one online or at your local automotive store, but make sure to read reviews before purchasing so that you aren't purchasing the wrong key fob compatible with your car.

How to Change the Battery on a spare key

There's nothing more frustrating than finding that the battery for your key fob has died and you can't unlock your car. Fortunately, it's easy to replace the battery and save some money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the metal key and reveal an opening on each side of the case. Put the flathead screwdriver in one of these slots, and gently take apart the two halves of the case. After the battery is fully exposed, take it out of the case and place it in a place where you won't forget about it.

Before you begin, be sure you have a brand new replacement battery. They can be found in any store that sells batteries or at an mazda replacement keys dealer near Winter Garden. Choosing the correct battery will ensure that your key fob is working correctly.

Next, put the replacement battery in the correct place and replace the cap on the battery. Be careful not to scratch the small rubber ring the battery rests on. Then press the two parts of the key fob together until you hear an audible click.

How to reset a Keyless Entry System

The key fob that you have in your Mazda 3 is not only an extra convenience, but also an important security feature. The car will not start if your key is lost or stolen, even if you've got a spare fob. This is because the key fob needs to be reset at the dealership in order to function properly. This can be a costly and frustrating experience therefore it's a great idea to know how to reset the system yourself.

To reset the system, disconnect the battery for 15 minutes. This will erase any residual electricity from the onboard computer. Then, disconnect both LF-ECU connector as well as the demand switch connectors. Then, verify the continuity between the following terminals:

To program a new key, or a spare, place it in the slot and set the ignition to ON. Put the key in for replacement Mazda Key about five seconds, then switch it off. The key's details will be transferred to your vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program up to three fobs, however, you must only use one at one time. This will prevent unauthorised people from stealing your key and gaining access to your vehicle. You can purchase a brand new key fob online, but you'll still have to visit an authorized locksmith or dealer to cut it and get it programmed.