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

Whether you dropped your key fob on the floor or it simply stopped working, it's best to have an extra key in your pocket. This article will tell you how to add, change, and reprogramme your mazda 2 spare key 3 keyfobs.

A word of warning: some keys require programming by a locksmith professional or dealer, whereas other keys do not. Use only official Mazda replacements to replace mazda key your key fob.

How do I add a spare key

You can also add a second key if you don't have a spare key, or when you accidentally damage the one you already have. To do this, you'll need a small screwdriver with a flat head and an CR2025 battery that's new. Once you've got these tools you can open up the key fob to change the battery. First look for the key release button for the auxiliary key. It's located on the underside of the metal portion. It's easy to locate. When you hit the button, the back cover will fall off instantly. Then, you can insert the head of the screwdriver into the notch or the space at the top of the metal part and pull it off.

Insert the spare or new key into the slot after you have removed the auxiliary key. Set the ignition to ON and wait for around five seconds before turning it to off. This will allow the system to recognize the new key and begin 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 use more than two key fobs to start your car. This is a security precaution designed to stop unauthorized users, like valet drivers, from activating your key and thereby 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 program it if your original key gets lost or stolen. This will prevent unauthorised persons from getting into your car and causing damage to it. This process should work on any Mazda but you'll need two keys that work to begin the process of reprogramming. If you don't own two keys that function it's recommended to take your Mazda to a dealer to get this done.

Begin by getting into your driver's seat and close the door, with the exception for the one that's been opened. Set the ignition to ON and insert the initial working key. Wait five seconds, then take the key out and repeat the process with the second key.

After you've completed programming your new key, you'll have three keys that you can use to start your car in the future. Before storing each key, make sure it's functioning correctly.

It's a good idea buy an extra Mazda 3 key fob, especially if you're a driver who frequently loses their key or has other issues with it. You can purchase one online or at your local auto store. Be sure to go through reviews prior to purchasing so that you don't get a key fob which isn't compatible with your vehicle.

How to change the battery with a spare key?

There's nothing worse than discovering that the battery in your key fob has gone out and you're not able to unlock your vehicle. It's not a problem to replace the battery and save some cash 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. Press the flathead screwdriver into one of these slots and gently remove the two halves of the case. Once the battery is fully exposed, take it out and place the case somewhere safe from being lost.

Be sure to bring an additional battery before you begin. They can be found in any store that sells batteries or at an Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob is working correctly.

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

How do you reset the Keyless Entry System

The key fob that you have in your Mazda 3 is not only a convenience, it's also an important security feature. The car will not start if your key is lost or stolen, even if you've got an extra key fob. The key fob should be reprogrammed by a dealer to make it work again. This can be an expensive and frustrating ordeal therefore it's a great idea to learn how to reset the system yourself.

To reset the system, disconnect the battery for 15 minutes. This will eliminate any remaining electrical current from the computer on board. Next, disconnect the LF-ECU and demand switch connectors. Verify that the connections are in good order between the terminals.

Place the key in the slot and switch on the ignition. Switch off the ignition after approximately five minutes. The information from the key will be added to the vehicle's computer and the new fob will be able to start your vehicle in the future. You can program up to three fobs but you must only use one at each time. This will prevent unauthorised people from stealing your key and getting access to your car. You can buy a new keyfob on the internet, but it will still need to be cut and programmed by a dealer.