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

If you've dropped your key fob on the ground or it simply stopped working, it's always recommended to keep an extra key in your pocket. This article will provide everything you need to be aware of changing, adding, and changing your mazda keys replacement 3 key fobs.

Be aware that some keys require programming from an experienced locksmith, whereas others don't. Make sure you only use official mazda 2 key fob replacement replacements for your key fob.

How do I add a spare key?

If you're not fortunate enough to receive a spare keys from the dealer when you purchase your Mazda 3 or accidentally break your current one do not fret -- there's still the option of adding another key. To accomplish this, you'll require an incredibly small screwdriver, a flathead screwdriver, and nearest an CR2025 battery that's new. Once you've got these tools, it's time to open the key fob and replace the battery. First look for the key release button for the auxiliary key. The button is located on the underside the metal part. It's easy to locate. Once you press the button, the cover should fall off right away. Then, you can insert the head of the screwdriver into the notch or spacing at the top of the metal piece and pull it off.

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 before turning it to off. This will allow the system to recognize the new key and start your vehicle in the future.

You can only program three keys into your Mazda 3. You don't want to have to use more than two keys to start your car. This is a security precaution that is designed to block unauthorized users, such as valet drivers from activating your key and thereby starting your car.

How do you reprogram an unrepaired key?

It's a good idea to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorized persons from stealing your car and starting it. This will work with any Mazda. You will need two keys that are functioning to begin the reprogramming process. If you don't have the two working keys, you'll have to bring your car to the dealership to complete the process.

Begin by stepping into your driver's seat, and shutting the door, excluding for the one that's been opened. Place the working key in the slot, and then turn the ignition to ON. Then wait five seconds before taking out the key. Repeat with the second key.

Once you've finished programming your new key, you'll have three working keys that you can use to start your vehicle in the future. Test each key to make sure that they're operating correctly before throwing them away.

It's a good idea to buy an extra Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can purchase one on the internet or at your local auto store. Make sure to review the reviews before buying to ensure you don't buy an item that isn't compatible with your vehicle.

How do you change the battery on a spare key?

There's nothing worse than discovering that the battery on your key fob been damaged and you're unable to unlock your car. It's a good thing that it's simple to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary key button on the back of the key fob. This will take out the metal auxiliary key and expose an opening on both sides of the case. The flathead should be inserted into one of these slots, and then gently pry the two halves of the case apart. When the battery is completely exposed, remove it and put it away somewhere you won't forget it.

Make sure you have an extra battery in place prior to starting. They can be found at any store that stocks batteries or at an Mazda dealer near Winter Garden. The right type of battery is essential to ensure that your key fob functions correctly.

Replace the battery cap and then insert the new battery. Be careful not to damage the small rubber ring the battery is placed on. The two halves should be pressed together until you hear the click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenience. It also serves as a security measure. The car will not start if your key is stolen or lost, even if you've got a spare fob. This is because the key fob has to be reprogrammed at the dealership to function properly. This can be an expensive and stressful experience It's a good idea to learn how to reset the system yourself.

To reset the system, remove the battery for around 15 minutes. This will eliminate any remaining electricity from the on-board computer. Then, disconnect both connectors for the LF-ECU and the demand switch connectors. After that, test 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. Stop the ignition after approximately five seconds. The key's information has been transferred to the computer of your vehicle and the new fob can start your car. You can program as many fobs as want however only one should be used at a given time. This will prevent unauthorized people from stealing your keys and getting access to your vehicle. You can purchase a brand new keyfob on the internet, but it must be cut and programmed by a dealer.