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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 has stopped working, it's always best to have a spare key on hand. This article will cover everything you should know about changing, adding, and changing the programming of your Mazda 3 key fobs.

Certain keys require programming from professional locksmiths, while others do not. Make sure to use official mazda 2 key replacement replacements for your key fob.

How do you add an additional 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, don't worry -- there's an option to make another key. You'll need the flathead screwdriver, as well as an CR2025 battery. Once you've got the tools, it is time to open the key fob. First, locate the button that allows you to release the key. The button is on the underside of the metal part. It's easy to locate. The cover on the back should fall off as soon as you press the button. Then, place the screwdriver's head into the notch at the top or the space, and take the metal part away.

Insert the spare or new key into the slot after taking out the secondary key. Turn the ignition on and wait for five seconds, then set it to off. This will register the new key's information to the system and allow it to start your car in the future.

You can only program three keys to your Mazda 3. The final thing you want is to have more than two functioning key fobs and not being capable of getting your vehicle started. This is a safety measure to stop unauthorized users from activating your key fobs and starting your car.

How to Reprogram a Spare Key

If you have a spare key, it's a good idea be aware of how to reprogram it in case the original key you had is lost or stolen. This will stop unauthorized persons from opening your car or taking it. This procedure should work with any Mazda, though you'll need two working keys to begin the reprogramming process. If you don't own two working keys, you'll need to bring your vehicle to the dealer to get it done.

Start by stepping into the driver's seat, close all the doors, except the one that is open. Set the ignition to ON and then insert the first working key. After five seconds, remove the key. Repeat the process with the second key.

After programming your new key you should have three keys that start your car in the near future. Before saving each key, be sure that it's working correctly.

It's a good idea to purchase an extra Mazda 3 key fob, especially if your car is one who often loses your key or has other issues with it. You can purchase one online or at your local automotive retailer, but make sure to read the reviews prior to purchasing so you aren't purchasing one that's not compatible with your car.

How to change the Battery on a spare Key

There's nothing worse than discovering that the battery in your key fob has been damaged and you're unable to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will release the metal key and reveal two slots on the opposite side of the case. Put the flathead into one of these slots and then gently push the two halves apart. When the battery is completely exposed, remove it and place the case in a place where you will not forget it.

Before you begin, be sure that you have a new replacement battery. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. Using the correct type of battery will ensure that your key fob operates effectively.

Then, put the new battery in its place and then replace the cap on the battery. Be careful not to damage the rubber ring on which the battery rests. Finally, press the two halves of the key fob together until you hear the sound of a click.

How do I reset the system's Keyless Entry System

The key fob inside your mazda rx8 Key fob 3 is not only a convenience, it's also an important security feature. The car will not start if the key is lost or stolen even if you have an extra fob. The key fob has to be reprogrammed by the dealer to allow it to work again. It can be a frustrating and expensive ordeal. So, it's best to learn how to reset the system.

To reset the system, remove the battery for 15 minutes. This will eliminate any remaining electric current from the onboard computer. Next, disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

To program the new key or spare, place it in the slot and set the ignition to ON. Keep the key in place for about five seconds and then turn off. The information from the key will be transferred to your vehicle's computer and the new fob will be able start your vehicle in the future. You can program as many fobs as you want however only one should be in use at any certain time. This will prevent unauthorised people from stealing your keys and gaining access to your car. You can buy a new key fob on the internet, but you'll still need to go to an expert locksmith or dealer to cut it and get it programmed.