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

It's a good idea to have an extra key in your pocket regardless of whether you lost the keyfob you were using or it stopped working. This article will go over everything you should be aware of when the process of adding, changing, and changing the programming of your Mazda 3 key fobs.

Be aware that some keys require programming from an expert locksmith, while others do not. Only use genuine Mazda replacements to replace your key fob.

How do I add a spare key?

You can add another key in the event that you don't have a spare key available or if you accidentally damage the one you have. You'll need a flathead screwdriver and an CR2025 battery. Once you've got these items you need, it's time to open the key fob. First look for the auxiliary key release button. It's on the underside of the metal piece and is easy to locate. The back cover should come off as soon as you press the button. Then, put the screwdriver's tip into the notch at the top or in the space, and remove the metal part.

Once the auxiliary key has been removed, insert your new or spare key into the slot. Switch the ignition on and wait for about five seconds, then set it to off. This will add the new information on the key to the system, allowing it to start your car in the future.

It's important to know that you can only program up to three keys on your mazda 3 key fob replacement 3. The final thing you want is to have more than two working key fobs and not being in a position to get your vehicle started. This is a precautionary measure to stop unauthorised users from activating your keys and then starting your vehicle.

How to Reprogram a spare key

It's a good idea to learn how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from starting your car or stealing it. This will work with any Mazda. You will require two keys that are working to begin the reprogramming process. If you don't have two keys that function then it's best to bring your car to a dealer to have this completed.

Begin by putting yourself in the driver's seat, and closing the door, except for the one that's been opened. Set the ignition to ON and insert the first working key. Take five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you should have three keys that will work to start your vehicle in the future. Before storing each key, make sure it's functioning correctly.

You should consider buying a spare Mazda 3 remote, especially in the event that your vehicle is prone to issues. You can purchase one online or at your local auto retailer, but make sure to read the reviews before buying so you can avoid purchasing a key fob that's not compatible with your car.

How do I change the battery on a spare Key

There's nothing more frustrating than discovering that the battery for your key fob has gone out and you're not able to unlock your vehicle. Fortunately, it's easy to replace the battery and save some money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the metal key auxiliary to reveal a slot on both sides of the case. Press the flathead into one of these slots and then gently pry the two halves apart. When the battery is completely exposed, remove it and put it away somewhere that you won't forget about it.

Before you start, make sure you have a new replacement battery. You can purchase them at any store that sells batteries or at an Mazda dealer close to Winter Garden. Choosing the correct battery will ensure that your key fob works properly.

Replace the battery cap and then install the new battery. Be careful not damage the rubber ring that holds the battery. Then press the two parts of the key fob until you hear a click.

How to reset a Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also a security feature. If you lose your key, or have it stolen the car won't start even if you've got the spare fob. The key fob needs to be reprogrammed by the dealer to make it work again. This could 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 electric current from the onboard computer. The next step is to disconnect the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

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