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

It's a good idea always to keep an extra key in your pocket, whether you dropped the keyfob you were using or it stopped working. This article will cover everything you should be aware of the process of adding, changing, and changing your Mazda 3 key fobs.

A word of warning: some keys require programming by a professional locksmith or dealer, while others do not. Only use genuine Mazda replacements to replace your key fob.

How to add a spare key

You can also add an additional key in case you don't have a spare key available or when you accidentally damage your existing one. You'll need a flathead screwdriver, and a CR2025 new battery. Once you've got these items and tools, you're ready to open the key fob. Locate the auxiliary key release. It's located on the underside the metal portion. It's easy to find. When https://www.thekeylab.co.uk/mazda-car-keys/ hit the button, the cover should be removed immediately. Then, insert the screwdriver's tip into the notch at the top or the space, and remove the metal part.

Insert the spare or new key into the slot after taking out the additional key. Turn on the ignition and wait for approximately five seconds, then set it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to note that you can only program up to three keys for your Mazda 3. You don't want to have to use more than two key fobs to start your car. This is a security precaution that is designed to block unauthorized users, such as valet drivers who are not authorized to use your key and thereby launching your vehicle.

How to Reprogram a Spare Key

If you have a spare key it's a good idea be aware of how to program it in the event your original key gets lost or stolen. This will keep unauthorised persons from starting your car or stealing it. This should work with any Mazda. You will need two keys that work to start the reprogramming process. If you don't have two keys that work it's recommended to take your Mazda to the dealer to have this done.

Begin by putting yourself in the driver's seat and shutting the door, excluding for the one that's already opened. Insert the first working key into the slot, and then set the ignition to the ON position. Wait five seconds before removing the key. Repeat the process with the second key.

After you've completed programming your new key, you should have three working keys that you can use to start your vehicle in the future. Before saving each key, be sure it's functioning correctly.

It's a good idea to purchase an extra Mazda 3 key fob, especially if you're someone who often loses your key or has other issues with it. You can purchase one on the internet or in your local auto store. Make sure you review the reviews before buying to ensure that you don't get one that's not compatible with your car.

How do you change the battery with a spare key?

There's nothing worse than discovering that the battery in your key fob has gone out and you're not able to unlock your car. It's a good thing that it's simple to replace the battery and save some money at the dealer.

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The first step is to press the auxiliary key button on the back of the key fob. This will take out the key from the metal and reveal a slot on each side of the case. Put the flathead into one of these slots, and then gently push the two halves of the case apart. When the battery is completely exposed, take it out and place the case somewhere safe from being lost.

Be sure to have a new battery ready prior to starting. These batteries can be purchased at any retailer that sells batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob operates correctly.

Replace the cap of the battery and then install the new battery. Be careful not to scratch the small rubber ring that the battery rests on. The two halves should be pressed together until you hear the click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security feature. If you lose your key, or have it stolen, the car will not start even if you have the spare key fob. This is because the fob that you have to be reprogrammed at the dealership to work properly. It can be a frustrating and costly process. Therefore, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining power from the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

To program an entirely new key or spare, place it in the slot and set the ignition to ON. Leave the key in for around five seconds and then switch it off. The key information is now transferred to the computer of your vehicle and the new fob will start your vehicle. You can program up to three fobs but you should only use one at one time. This will stop unauthorised people from copying your key and gaining access to your car. You can purchase a brand new keyfob online, however it'll still need to be cut and programmed by an authorized dealer.