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

It's a good idea always to keep a spare key on hand no matter if you've dropped your keyfob, or it has stopped working. This article will cover everything you need to learn about adding, changing, or changing your Mazda 3 key fobs.

Certain keys require programming from an experienced locksmith, whereas others don't. Use only genuine Mazda replacements to replace your key fob.

How to Add a Spare Key

If you're not fortunate enough to get a spare key from the dealer when you purchase your mazda 6 key fob 3 or accidentally break your current one, don't worry -- there is still an option to get another key. You'll need a flathead screwdriver, and a CR2025 new battery. Once you've got these items, it is time to open the key fob. Locate the key release auxiliary. The button is on the underside the metal portion. It's easy to find. Once you press the button, the cover should slide off immediately. Then, you can insert the head of the screwdriver into the notch or space on the top of the metal component and pry it off.

Insert the spare or new key into the slot after you have removed the additional key. Set the ignition ON and wait for five seconds, then set it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to know that you can only program up to three keys for your Mazda 3. You don't want to have to use more than two keys to start your car. This is a security precaution that is designed to block unauthorized users, such as valet drivers from activating your key and thereby launching your vehicle.

How to Reprogram a Spare Key

It's smart to be aware of how to reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorized persons from abusing your vehicle and re-starting it. This process is compatible with any Mazda, though you'll need two keys working to begin the process of reprogramming. If you don't have two working keys it's recommended to take your Mazda to a dealer to get this completed.

Begin by stepping into your driver's seat and closing the door, except for the one that's open. Place the first working key in the slot, then set the ignition to the ON position. Take five seconds before removing the key. Repeat the process with the second key.

After you've programmed your new key, you should have 3 keys that be able to start your vehicle in the future. Before you store each key, make sure it's working properly.

You should consider buying a spare Mazda 3 remote, especially in the event that your vehicle is prone to problems. You can buy one online or at your local automobile store, but make sure to read reviews prior to purchasing so you aren't buying the wrong key fob compatible with your car.

How do I change the battery using a spare key

There's nothing worse than finding that your key fob battery has been damaged and you're unable to unlock your vehicle. Luckily, it's easy to replace the battery and save some money at the dealership.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the key that is used as an auxiliary key, and expose an opening on both sides of the case. Place the flathead in one of these slots and then gently push the two halves of the case apart. When the battery is completely exposed, take it out and place it in a safe place somewhere you won't forget it.

Make sure you have an extra battery in place before you start. You can purchase them at any store that sells batteries or at an Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob functions correctly.

Replace the battery cap and then install the new battery. Be careful not to damage the small rubber ring the battery is placed on. The two halves should be pressed together until you hear the click.

How do I reset the Keyless Entry System

The key fob inside your Mazda 3 is not only an option for convenience, it's an important security feature. The car will not start if the key is stolen or lost even if you have an extra fob. The key fob should be reprogrammed by the dealer to allow it to work again. It's a difficult and expensive ordeal. Therefore, it's best to learn how you can reset the system.

To reset the system, disconnect the battery for around 15 minutes. This will erase any residual electrical current from the computer on board. Then, disconnect the LF-ECU and demand switch connectors. Check continuity between the following terminals.

To program an entirely new key or spare, insert it into the slot and set the ignition to ON. Put the key in for around five seconds, and then turn it off. The key's information is added to the vehicle's computer and the new fob will start your car. You can program up to three fobs however, you must only use one at each time. This will keep unauthorised individuals from stealing your key and getting access to your car. You can buy a new keyfob online, but it will still need to be programmed and cut by an authorized dealer.