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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 in your pocket regardless of whether you lost the keyfob or it was unable to function. This article will explain everything you need to learn about changing, adding, and programming your Mazda 3 key fobs.

Warning: Some keys require programming from an experienced locksmith, whereas others don't. Make sure you only use official mazda new key fob replacements for your key fob.

How to add a spare key

If you're not fortunate enough to get a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one do not fret -- there is still the option of adding another key. To accomplish this, you'll require an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you have these items then it's time to remove the key fob to change the battery. Locate the auxiliary key release. It's located on the underside of the metal component and is easy to find. When you hit the button, the back cover will fall off instantly. Then, put the screwdriver head into the notch on top or in the space, and take the metal part away.

After the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition ON 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 is important to remember that you can only program up to three keys on your Mazda 3. The most important thing is to have more than two functioning key fobs and not being capable of getting your vehicle started. This is a safety precaution designed to stop unauthorized users, like valet drivers from activating your key and thereby starting your car.

How do I reprogram an unrepaired key?

If you have a spare key it's a good idea be aware of how to program it in the event the original key you had is lost or stolen. This will stop unauthorised people from starting your car or stealing it. This procedure should work with any Mazda however, you'll require two keys working to begin the reprogramming process. If you don't own two keys that work it's recommended to take your mazda keyless entry remote to a dealer to get this done.

Begin by getting in your driver's seat, and closing the door, except for the one that's already opened. Turn the ignition on and insert the first working key. Take five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you'll have 3 keys that will work to start your car in the future. Test each key to be sure that they're functioning properly before putting them away.

It's a good idea to purchase an extra Mazda 3 key fob, especially if you're someone who is prone to losing keys or has other issues with it. You can purchase one online or at your local auto store. Be sure to review the reviews before buying to ensure you don't buy the wrong key fob that isn't compatible with your vehicle.

How do I change the battery on a spare key

It's a nightmare to discover that your key fob has failed and you're unable to unlock your car. It's easy to replace the battery yourself and save money at the dealership.

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

Be sure to bring a replacement battery before you start. They are available at any retailer that sells batteries or at a mazda 6 key fob programming dealer close to Winter Garden. Choosing the correct battery will ensure that your key fob works properly.

Then, place the new battery in its place and then replace the cap on the battery. Be careful not to scratch the rubber ring that holds the battery. Press the two halves together until you can hear the click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security measure. The car will not start if your key is stolen or lost, even if you've got an extra fob. This is because the key fob needs to be reprogrammed at the dealership to work again. This could be a costly and frustrating ordeal therefore it's a great idea to learn how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will erase any residual electrical power in the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Check for continuity between the terminals.

Place the key in the slot, then switch the ignition on. Put the key in for around five seconds and then switch it off. The key information will now be added to the vehicle's computer and the new fob will be able to start your vehicle in the future. You can program any number of fobs you need, but only one should be utilized at any particular time. This will stop unauthorized individuals from stealing your keys and getting access to your car. You can purchase a new key fob on the internet, but you'll still have to visit a dealer or locksmith to cut it and get it programmed.