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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 or it has stopped working. This article will teach you how to add, alter, and reprogramme your Mazda 3 keyfobs.

Warning: Some keys require programming from a professional locksmith, while others do not. Make sure you use only official Mazda replacements to replace your key fob.

How to Add a Spare Key

You can also add a second key if you don't have a spare key available or when you accidentally damage the one you have. To do this, you'll need an inexpensive flathead screwdriver as well as an updated CR2025 battery. Once you've got these items, it is time to open the key fob. Find the auxiliary key release. It's located on the underside of the metal piece and is easy to locate. The cover that covers the back should come off the moment you press the button. Then, you can insert the screwdriver's head in the notch on top or in the space, and pull the metal piece off.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and then wait for around five seconds, and then turn it to off. This will register the new key's information to the system which will allow it to start your car in the future.

You can only program three keys to your Mazda 3. You don't want to have to utilize more than two key fobs to start your car key mazda. This is a security measure designed to stop unauthorized users, like valet drivers, from activating your key and thereby starting your car.

How to Reprogram a Spare Key

It's a good idea to learn how you can reprogram a spare key in the event that your original key gets lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This process is compatible with any Mazda, though you'll need two working keys to start the process of reprogramming. If you don't own two keys that work then it's best to bring your Mazda Key Cut to the dealer to have this completed.

Start by stepping into driver's position and closing all the doors except the one that is open. Turn the ignition on and insert the initial working key. For five seconds, remove the key and repeat the process with a second key.

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

You should think about buying a spare Mazda 3 remote, especially when your car is susceptible to issues. You can find one online or at your local auto store, but make sure to read reviews before purchasing so that you can avoid purchasing a key fob that's not compatible with your car.

How do I change the battery on a Spare Key

There's nothing worse than discovering that the battery on your key fob failed and you are unable to unlock your car. It's simple to replace the battery yourself and save money at the dealer.

Press the auxiliary key button at the back of the keyfob. This will detach the key made of metal and reveal two slots on the opposite 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, remove the case and put it somewhere that you will not forget about it.

Make sure you have a new battery ready prior to beginning. These batteries can be purchased at any store selling batteries or from a Mazda dealer in Winter Garden. The correct battery is vital to ensure that your keyfob is working correctly.

Replace the cap on the battery, and then insert the new battery. Be careful not to scratch the rubber ring on which the battery rests. Finally press the two halves of the key fob until you hear the sound of a click.

How do I reset a Keyless Entry System

The key fob inside your mazda 2 key fob replacement 3 is not only a convenience, it's also an important security feature. The car won't start if the key is lost or stolen even if you have a spare key fob. The key fob needs to be reprogrammed by a dealer to enable it to function again. This can be an expensive and time-consuming process, so it's a good idea to understand how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Verify that the connections are in good order between the terminals.

To program the new key or spare, insert it into the slot and set the ignition to ON. Turn off the ignition after about five minutes. The key information is now transferred to the computer of your vehicle and the new fob is able to start your vehicle. You can program as many fobs as would like but only one can be used at any specific time. This prevents unauthorized people from copying the key and gaining access to your car. You can purchase a brand new keyfob from the internet, however it still needs to be cut and programmed by a dealer.