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

Whether you dropped your key fob on the ground or it just stopped working, it's a good idea to have a spare key handy. This article will explain everything you need to be aware of adding, changing, and changing your Mazda 3 key fobs.

Certain keys require programming from a professional locksmith, while others don't. Be sure to only use official Mazda replacements for your key fob.

How to Add a Spare Key

You can also add another key in the event that you don't have a spare key, or when you accidentally damage your current one. To accomplish this, you'll require a small screwdriver with a flat head and an CR2025 battery that's new. Once you have the items you need, it's time to open the key fob. Find the key release auxiliary. It's located beneath the metal portion. It's easy to locate. The cover that covers the back should come off as soon as you press the button. Then, put the screwdriver's head into the notch at the top or in the space, and take the metal part away.

Insert the spare or new key into the slot after you have removed the additional key. Turn on the ignition and wait for five seconds before turning it to off. This will register the new information on the key to the system that will allow it to start your vehicle in the future.

It's important to know 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 to start your vehicle. This is a safety precaution that is designed to block unauthorized users, like valet drivers from activating your key and thereby starting your car.

How to reprogram an unrepaired key

It's a smart idea to know how you can reprogram a spare key in the event that your original key gets lost or stolen. This will prevent unauthorised persons from stealing your car and starting it. This process is compatible with any Mazda, though you'll need two keys that work to begin the process of reprogramming. If you don't have two keys that work it's recommended to take your vehicle to a dealer to get this completed.

Begin by stepping into the driver's seat and closing all the doors except the one that is open. Set the ignition to ON and insert the initial working key. Take five seconds before removing the key. Repeat the process with the second 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. Test each key to ensure sure that they're working properly before taking them off.

You should think about buying a spare Mazda 3 remote, especially when your car is susceptible to problems. You can find one online or at your local automobile store, but be sure to read the reviews prior to purchasing so you can avoid purchasing an item that isn't compatible with your vehicle.

How do I change the battery with a spare key?

There's nothing more frustrating than finding that your key fob battery has gone out and you're not able to unlock your car. It's not a problem to replace the battery and save yourself some cash at the dealership.

Press the auxiliary button on the back of the keyfob. This will detach the metal key and reveal two slots on the opposite side of the case. Use the screwdriver's flathead to push it into one of these slots, and gently remove the two halves of the case. When the battery is fully exposed, take it out of the case and place it in a spot where you'll never forget it.

Be sure to bring a new battery ready before you start. You can find these at any store that sells batteries or at an Mazda dealer close to Winter Garden. Choosing the right battery will ensure that your key fob functions perfectly.

Next, put the new battery in place and replace the battery cap. Be careful not to damage the small rubber ring that the battery is placed on. Finally, press the two halves of the key fob together until you hear an audible click.

How do mazda 6 car key replacement reset the Keyless Entry System


The key fob on your Mazda 3 is not only an added convenience, but it's also an important security feature. If you lose your key or have it stolen the car will not start even if you've got the spare fob. This is because the key fob needs to be reset at the dealership to work again. This can be a costly and frustrating ordeal therefore it's a great idea to know how to reset the system yourself.

To reset the system, disconnect the battery for approximately 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect both the LF-ECU connector and the demand switch connectors. After that, test for continuity between the following terminals:

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Stop the ignition after about five seconds. The key's details are now transferred to the computer of your vehicle and the new fob is able to start your vehicle. You can program up to three fobs but you must only use one at one time. This prevents unauthorized people from copying the key and getting ahold of your vehicle. You can purchase a brand new key fob on the internet, but you'll need to visit a locksmith or dealer in order to cut it and get it programmed.

Website: https://www.autokeys-r-us.co.uk/mazda/