10 Things You Learned In Preschool To Help You Get A Handle On Mazda 6 Key How to Add, Change, and Reprogram a Mazda 3 Spare Key

It's a good idea to have a spare key on hand in case you lose the keyfob you were using or it was unable to function. This article will cover everything you must know about adding, changing, and changing the programming of your Mazda 3 key fobs.

A word of warning Certain keys require programming by a professional locksmith or dealer, whereas others do not. Make sure you use only genuine Mazda replacements to replace your key fob.

How to Add a Spare Key

You can add another key in the event that you don't have a spare key available or when you accidentally damage the one you already have. To do this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you've got these tools and are ready to remove the key fob and change the battery. First, locate the button that allows you to release the key. 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, insert the head of the screwdriver into the notch or the space at the top of the metal part and pull it off.

Once the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON, and wait for five seconds before setting it to off. This will add the new key's information to the system, allowing it to start your vehicle in the future.

You can only program three keys into your Mazda 3. The most important thing is to have more than two functioning key fobs and not being in a position to get your car started. This is a safety precaution designed to prevent unauthorized users, such as valet drivers, from activating your key and starting your vehicle.

How do you reprogram a spare key?

If you have a spare key it's a good idea be aware of how to program it in the event your original key is lost or stolen. This will stop unauthorized persons from starting your car or stealing it. This should work with any Mazda. You will require two keys that work to start the reprogramming process. If you don't have two functioning keys, you'll need to take your vehicle to the dealership to have it done.

Begin by stepping into your driver's seat, and shutting the door, excluding for the one that's been opened. Place the first working key into the slot, then set the ignition to ON. Then wait five seconds before taking out the key. Repeat with the second key.

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

It's a good idea to buy a spare Mazda 3 key fob, especially if your car is one who frequently loses their key or has other issues with it. You can find one online or at your local automobile store, but make sure to read the reviews before buying so that you aren't purchasing a key fob that's not compatible with your vehicle.

How to change the Battery on a spare Key

It's depressing to find out that your key fob is dead, and you are locked out of your vehicle. Fortunately, it's easy to replace the battery and save yourself some money at the dealership.


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

Before you begin, be sure you have a new replacement battery. You can purchase them in any store that sells batteries or at a Mazda dealer close to Winter Garden. The correct battery is vital to ensure that your keyfob works correctly.

Then, put the new battery in its place and then replace the cap on the battery. Be careful not to damage the small rubber ring that the battery sits on. Finally, press the two parts of the key fob together until you hear the sound of clicking.

How to Reset the Keyless Entry System

The key fob that you have in your Mazda 3 is not only an extra convenience, but also an important security feature. The car won't start if the key is lost or stolen, even if you've got a spare fob. The key fob must be reset by the dealer to make it work again. This can be a costly and stressful experience It's a good idea to know how to reset the system yourself.

To reset the system, unplug the battery for approximately 15 minutes. This will remove any remaining electric current from the onboard computer. Then, disconnect both the LF-ECU connector as well as the demand switch connectors. Check for continuity between the following terminals:

Insert the key into the slot, and switch on the ignition. Put the key in for about five seconds, then switch off. The key's information will be added to the vehicle's computer, and the new fob will be able start your car in the future. mazda 3 car key G28CarKeys 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 gaining access to your car. You can purchase a new key fob on the internet, but you'll still need to visit an expert locksmith or dealer to have it cut and programmed.