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

It's a good idea to keep an extra key in your pocket in case you lose your keyfob, or it has stopped working. This article will cover everything you should be aware of adding, changing, and reprogramming your Mazda 3 key fobs.

A word of caution Some keys require programming by a professional locksmith or dealer, while others do not. Make sure to make use of official Mazda replacements for your key fob.

how to replace mazda key fob to add a spare key

If you're unable to receive a spare keys from the dealer when you purchase your Mazda 3 or accidentally break your current key but don't worry, there's an option to make another key. To do this, you'll need a small flathead screwdriver and a new CR2025 battery. Once you've got these tools, it's time to open up the key fob and replace the battery. First, locate the button that allows you to release the key. The button is beneath the metal portion. It's easy to locate. When you hit the button, the cover should be removed immediately. Next, place the screwdriver's head into the notch or space on the top of the metal part and pull it off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Turn on the ignition and wait for about five seconds, then set it to OFF. This will register the new mazda key key's information into the system that will allow it to start your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. The last thing you want is to have more than two working key fobs and not be in a position to get your car started. This is a security measure that is designed to block unauthorized users, like valet drivers from activating your key and starting your car.

How to Reprogram a Spare Key

If you have a spare key it's important to know how to program it in the event your original key is stolen or lost. This will keep unauthorized people from taking your car and then starting it. This process should work on any mazda smart Key Programming however you'll need two working keys to start the reprogramming. If you don't have two working keys, you'll have to bring your car to the dealership to get it done.

Start by stepping into driver's position, and close all the doors, except the one that is open. Set the ignition to ON and insert the first functioning key. For five seconds, take the key out and repeat the procedure with the second working key.

Once you've finished programming your new key, you'll have three keys that you can use to start your car in the future. Check each key to make sure that they're working properly before putting them away.

You should think about purchasing an extra Mazda 3 remote, especially if your car is prone to issues. You can buy one online or at your local auto store. Be sure to read reviews before purchasing to ensure that you don't purchase the wrong key fob that isn't compatible with your car.

How do I change the battery on a spare key?

It's very frustrating to discover that your key fob has died and you're locked out of your vehicle. It's not a problem to replace the battery and save some money at the dealer.

Press the auxiliary key button on the back of the keyfob. This will release the metal key and reveal an opening on each side of the case. Use the screwdriver's flathead to push it into one of these slots, and gently take apart the two parts of the case. When the battery is fully exposed, take it out of the case and place it somewhere that you will not forget it.

Make sure you have a new battery ready prior to beginning. You can find these at any retailer that sells batteries or at an Mazda dealer close to Winter Garden. Choosing the correct battery will ensure that your key fob is working effectively.

Next, put the replacement battery into place and replace the cap on the battery. Be careful not to damage the rubber ring on which the battery rests. The two halves should be pressed together until you can hear the click.

How can I reset the Keyless Entry System

The mazda 323 key 3 key fob is not just a practical feature. It also serves as a security measure. If you lose your key or have it stolen the car won't start, even if you have the spare key fob. The key fob needs to be reprogrammed by a dealer to make it work again. It's a difficult and costly process. So, it's best to understand how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Verify that the connections are in good order between the terminals.

Insert the key into the slot, and switch the ignition on. Stop the ignition after approximately five minutes. The information from the key will be transferred to your vehicle's computer and the new fob will be able start your car in the future. You can program up to three fobs but you should only use one at each time. This will stop unauthorized individuals from stealing your keys and getting access to your car. You can purchase a replacement key fob on the internet, but you'll still need to go to an authorized locksmith or dealer to cut it and get it programmed.