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

If you've dropped your key fob on the floor or it stopped working, it's always recommended to keep an extra key in your pocket. This article will cover everything you should be aware of when changing, adding, and changing your Mazda 3 key fobs.

Certain keys require programming from a professional locksmith, while others don't. Use only genuine Mazda replacements to replace your key fob.


How to add an extra key

If you're unable to get a spare key from the dealer when you buy your Mazda 3 or accidentally break your current one do not fret -- there is still a way to add another key. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an CR2025 battery that's new. Once you've got all the equipment then it's time to open the key fob. First, locate the auxiliary key release button. It's located on the bottom of the metal part. It's easy to find. When you press the button, the back cover should be removed immediately. Then, you can insert the head of the screwdriver into the notch, or the spacing at the top of the metal component and pull it away.

After the auxiliary key has been removed, insert your new or spare key into the slot. Turn the ignition on and wait for approximately five seconds, and then turn it to off. This will allow the system to recognize the new key and start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys on your Mazda 3. You don't want to have to use more than two key fobs in order to start your vehicle. This is a safeguard to prevent unauthorized users from activating your keys and launching your vehicle.

How to Reprogram a spare key

It's a good idea to be aware of how to reprogram a spare key in the event that your original key gets lost or stolen. This will stop unauthorised people from abusing your vehicle and re-starting it. This will work with any Mazda. You'll require two keys that are working to begin the reprogramming process. If you don't own two working keys, you'll need to bring your car to the dealership to complete the process.

Start by stepping into driver's seat, close all the doors with the exception of the one that is open. Turn the ignition on and insert the first working key. Wait for five seconds, then remove the key and repeat the process with the second key.

Once you've programmed your new key, you'll have three working keys that you can use to start your car in the future. Before you store each key, make sure that it's functioning properly.

It's a good idea to buy an extra Mazda 3 key fob, especially if your car is one who frequently loses their key or has other issues with it. You can find one online or at your local auto store, but make sure to read reviews before purchasing so that you can avoid getting a key fob that's not compatible with your car.

How to change the Battery on a Spare Key

There's nothing worse than discovering that your key fob battery has died and you can't unlock your car. Fortunately, it's easy to replace the battery and save some money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will take out the metal key auxiliary to reveal an opening on both sides of the case. Insert the flathead screwdriver into one of these slots. Then, gently pry apart the two halves of the case. Once the battery has been fully exposed, remove the case and place it somewhere that you will not forget it.

Before you start, make sure that you have a brand new replacement battery. You can purchase them in any store that sells batteries or at a Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob functions effectively.

Replace the cap on the battery, and then put in the new battery. Be careful not damage the rubber ring on which the battery rests. Press the two halves together until you hear the click.

How to Reset mazda key fob battery is not just a piece of equipment for convenience. It's also an element of security. If you lost your key or had 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 reset at the dealership in order to function properly. This can be a painful and expensive ordeal. Therefore, it's best to learn how you can reset the system.

To reset the system, disconnect the battery for about 15 minutes. This will eliminate any remaining electricity from the on-board computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Verify the continuity between the next terminals.

Place the key in the slot and turn the ignition ON. Keep the key in place for around five seconds and then switch off. The key's information is added to the vehicle's computer and the new fob will start your car. You can program up to three fobs, but you should only use one at a time. This will prevent unauthorized people from stealing your key and gaining access to your car. You can purchase a replacement key fob online, but you'll still have to visit a dealer or locksmith to have it cut and programmed.

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