How to Add, Change, and Reprogram a mazda keys replacement 3 Spare Key

If you've dropped your key fob on the floor or it stopped working, it's always a good idea to have a spare key on hand. This article will provide everything you need to learn about changing, adding, and changing the programming of your Mazda 3 key fobs.

Be aware that some keys require programming by an expert locksmith, while others do not. Make sure to use genuine Mazda replacements for your key fob.

How to add a spare key

If you're not fortunate enough to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current key, don't worry -- there's a way to add another key. You'll need a flathead screwdriver, and a new CR2025 battery. Once you've got these tools, it's time to open up the key fob and swap the battery. First look for the key release button for the auxiliary key. It's located on the underside of the metal portion and is easy to find. The cover on the back should fall off as soon as you press the button. Then, put the screwdriver's head in the notch on top or the space, and pull the metal piece off.

Insert your spare or new key into the slot after you have removed the accessory key. Turn the ignition on and wait for five seconds, and then turn it to OFF. This will add 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 to your Mazda 3. The final thing you want is to have more than two working key fobs and not be able to get your car started. This is a security measure to stop anyone who is not authorized from activating your key fobs and starting your car.

How do you reprogram a spare key

It's smart to know how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will keep unauthorized people from taking your car and then starting it. This should work with any Mazda. You will need two keys that work to begin the reprogramming. If you don't have two working keys, it's best to take your Mazda to a dealer to get this completed.

Begin by getting in your driver's seat, and shutting the door, excluding for the one that's already opened. Turn the ignition on and insert the initial working key. Wait for five seconds, then remove the key and repeat with the second working key.

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

It's a good idea buy a spare 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 buy one online or at your local auto store, but make sure to read the reviews before purchasing so that you can avoid purchasing one that's not compatible with your vehicle.

How to change the battery with a spare key?

There's nothing more frustrating than discovering that your key fob battery has died and you can't unlock your vehicle. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will detach the key made of metal and reveal two slots on the opposite side of the case. Press the flathead into one of these slots and then gently pull the two halves apart. Once the battery is fully exposed, remove it and place the case somewhere you won't forget it.

Be sure to bring a new battery ready prior to beginning. They can be bought from any store that sells batteries or from a mazda dealership key replacement (our website) dealer in Winter Garden. Choosing the right battery will ensure that your key fob operates perfectly.

Then, place the new battery into place and replace the battery cap. Be careful not to scratch the small rubber ring the battery is placed on. Then press the two halves of the key fob together until you hear a click.

How can I reset the Keyless Entry System

The key fob inside your Mazda 3 is not only a convenience, it's also an important security feature. The car won't start if your key is stolen or lost, even if you've got a spare fob. This is because the fob that you have to be reset at the dealership in order to function properly. It can be a costly and frustrating experience, so it's a good idea to know how to reset the system yourself.

To reset the system, disconnect the battery for around 15 minutes. This will clear any residual electric current from the onboard computer. Then, disconnect both the LF-ECU and demand switch connectors. Check continuity between the following terminals.

Insert the key into the slot and switch on the ignition. The key should remain in the ignition for about five seconds, then turn it off. The key information will now be added to your vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program up to three fobs however, you should only use one at a time. This prevents unauthorized people from copying the key and getting ahold of your car. You can purchase a replacement keyfob on the internet, but it must be programmed and cut by an authorized dealer.