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

It's a good idea to keep a spare key on hand regardless of whether you lost the keyfob you were using or it stopped working. This article will go over everything you should know about adding, changing, and changing the programming of your Mazda 3 key fobs.

A word of warning: some keys require programming by a locksmith professional or dealer, while other keys don't. Use only genuine Mazda replacements to replace your key fob.

How to Add a Spare Key

You can also add a second key if you don't have a spare key available or if you accidentally break the one you already have. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you have these items then it's time to access the key fob and swap the battery. First look for the key release button for the auxiliary key. The button is on the underside of the metal portion. It's easy to find. Once you hit the button, the back cover should be removed immediately. Next, insert the head of the screwdriver into the notch or the space on the top of the metal piece and pull it away.

Insert your spare or new key into the slot following the removal of the additional key. Set the ignition to ON and wait for around five seconds before setting it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It is only possible to program three keys into your Mazda 3. The last thing you want is to have more than two working key fobs and not be able to get your car started. This is a precautionary measure to stop unauthorised users from activating your keys and launching your vehicle.

How to Reprogram a spare key

It's a smart idea to be aware of how to reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from getting into your car and causing damage to it. This should work with any Mazda. You will require two keys that work to start the reprogramming process. If you don't own two keys that work then it's best to bring your Mazda to the dealer to get this done.

Start by stepping into the driver's position, and close all the doors, except the one that is open. Place the working key into the slot, Mazda 3 Spare Key then set the ignition to the ON position. Then wait five seconds before taking out the key. Repeat with the second key.

After you finish programming your new key, you'll have three keys that will be able to start your vehicle in the future. Test each key to make sure that they're working properly before throwing them away.

You should think about purchasing a spare mazda 3 key fob replacement 3 remote, especially if your car is prone to issues. You can purchase one online or in your local auto store. Make sure to look up reviews before you purchase to ensure that you don't get the wrong key fob that isn't compatible with your car.

How to Change the Battery on a Spare Key

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

Press the auxiliary key button at the back of the keyfob. This will take out the metal key and reveal the slots on both sides of the case. Press the flathead into one of these slots and then gently pull the two halves apart. Once the battery has been fully exposed, remove the case and place it in a place where you won't forget about it.

Before you begin, make sure you have a brand new replacement battery. They are available at any store that stocks batteries or at a Mazda dealer near Winter Garden. The correct type of battery is vital to make sure that your keyfob functions correctly.

Replace the cap on the battery and then replace the battery. Be careful not to scratch the small rubber ring the battery sits on. The two halves should be pressed together until you hear a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also an element of security. The car won't start if the key is lost or stolen even if you have an extra key fob. The key fob must be reset by the dealer to make it work again. It's a difficult and costly process. So, it's best to know how to reset the system.

Remove the battery from the system for 15 minutes. This will take out any remaining electricity in the on-board computer. Then, disconnect the LF-ECU connector and the demand switch connectors. Verify the continuity between the next terminals.

To program a new key, or a spare, place it in the slot and set the ignition to ON. Put the key in for about five seconds and then turn off. The key's details are now added to the vehicle's computer and the new fob can start your vehicle. You can program up to three fobs but you should only use one at each time. This will prevent unauthorized people from stealing your key and gaining access to your car. You can purchase a replacement keyfob on the internet, but it must be programmed and cut by a dealer.