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

It's a good idea to keep an extra key at hand regardless of whether you lost your keyfob or it has stopped working. This article will teach you how to add, change or reprogramme your Mazda 3 keyfobs.

Note: Some keys require programming from an experienced locksmith, whereas others don't. Only use official mazda new key replacements to replace your key fob.

How do I add an additional key

If you're unable to receive a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one, don't worry -- there is still an option to get another key. You'll need the flathead screwdriver, as well as a new CR2025 battery. Once you've got these items, it's time to open the key fob and replace the battery. First find the key release button for the auxiliary key. It's located on the underside the metal part. It's easy to find. The back cover should come off as soon as you press the button. Then, you can insert the screwdriver's head into the notch on top or into the space and pry the metal part 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, then turn it to off. This will register the new information on the key to the system and allow it to start your car in the future.

It is only possible to program three keys into your mazda demio key replacement 3. The most important thing is to have more than two functioning key fobs and not be in a position to get your car started. This is a security precaution designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and starting your car.

How to reprogram a spare key?

If you have a spare key, it's a good idea know how to reprogram it in the event that your original key gets lost or stolen. This will keep unauthorized people from abusing your vehicle and re-starting it. This will work with any mazda 3 key programming. You'll require two keys that are working for the reprogramming to begin. If you don't have two functioning keys, you'll have to take your vehicle to a dealership to have it done.

Begin by getting into your driver's seat and closing the door, except for the one that's already opened. Turn the ignition on and insert the first functioning key. After five seconds, remove the key and repeat the procedure with the second working 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.

It's a good idea buy an extra Mazda 3 key fob, especially if your car is one who has a tendency to lose their keys or has other issues with it. You can buy one online or at a local automotive store. Make sure to go through reviews prior to purchasing to ensure you don't buy one that's not compatible with your car.

How to Change the Battery on a spare key

It's a nightmare to discover that the key fob you used to use has gone out, and you are unable to unlock your vehicle. It's not a problem to replace the battery and save yourself some cash at the dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will remove the auxiliary key and expose an opening on both sides of the case. Put the flathead into one of these slots and then gently pry the two halves apart. Once the battery is fully exposed, remove it and set aside the case somewhere you won't forget it.

Before you start, make sure you have a new replacement battery. You can find these at any store that stocks batteries or at a Mazda dealer near Winter Garden. The correct type of battery is vital to make sure that your keyfob functions correctly.

Next, put the new battery in place and replace the cap of the battery. Be careful not to scratch the small rubber ring that the battery is placed on. Finally press the two halves of the key fob until you hear the sound of clicking.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It's also a security feature. The car won't start if your key is lost or stolen even if you have a spare fob. This is because the key fob has to be reprogrammed by the dealership to work again. This can be a painful and costly ordeal. Therefore, it's best to learn how you can reset the system.

To reset the system, disconnect the battery for around 15 minutes. This will remove any residual electrical current from the computer on board. Then, disconnect the LF ECU and demand switch connectors. Check for continuity between the following terminals:

To program a new key, or a spare, place it in the slot and turn the ignition to ON. The key should remain in the ignition for about five seconds, then turn it off. The key information will now be saved to your car's computer, and the new fob will be able start your vehicle in the future. You can program up to three fobs but you should only use one at one time. This will prevent unauthorized people from stealing your key and getting access to your car. 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.