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

If you've dropped your key fob on the ground or it simply stopped working, it's a good idea to have an extra key available. This article will show you how to add, alter, and reprogramme your Mazda 3 keyfobs.

Be aware that some keys require programming by an experienced locksmith, whereas others don't. Make sure you use only genuine mazda 3 car key 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 break your current one. You'll need a flathead screwdriver and the CR2025 replacement battery. Once you've got all the equipment, it is time to open the key fob. First look for the key release button for the auxiliary key. The button is on the bottom of the metal part. It's easy to find. Once you press the button, the cover should slide off immediately. Then, place the screwdriver's head into the notch on top or in the space, and pry the metal part off.

Insert the spare or new key into the slot after removing the auxiliary key. Set the ignition to ON, and wait for about five seconds before setting it to off. This will register the new key's information into the system which will allow it to start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The last thing you want is to have more than two working key fobs and not being in a position to get your car started. This is a safety measure designed to stop unauthorized users, like valet drivers from activating your key and thereby launching your vehicle.

How to Reprogram a spare key

If you have a spare key it's a good idea to know how to reprogram it in case your original key gets lost or stolen. This will keep unauthorized people from taking your car and then starting it. This process should work on any Mazda however, you'll require two keys working to begin the reprogramming process. If you don't own two keys that work it's recommended to take your vehicle to a dealer to get this completed.

Start by stepping into the driver's seat, shutting all doors, with the exception of the one that is open. Turn the ignition on and insert the initial working key. Then wait five seconds before taking out the key. Repeat the process with the second key.

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

It is advisable to purchase an extra mazda car keys replacements 3 remote, especially if your car is prone to problems. You can purchase one online or at your local automobile retailer, but make sure to read reviews before purchasing so that you can avoid getting the wrong key fob compatible with your car.

How do you change the battery on a spare key?

There's nothing worse than finding that the battery on your key fob been damaged and you're unable to unlock your car. It's not a problem to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary key button on the back of the key fob. This will take out the metal key and reveal two slots on the opposite side of the case. Place the flathead in one of these slots, and then gently push the two halves apart. Once the battery is fully exposed, remove the case and place it somewhere that you will not forget about it.

Make sure you have a replacement battery before you start. They are available in any store that sells batteries or at a Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob works correctly.

Then, put the new battery in place and replace the cap of the battery. Be careful not to scratch the small rubber ring that the battery sits on. Then press the two parts of the key fob together until you hear an audible click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security feature. If you lose your key or have it stolen the car will not start even if you've got the spare fob. The key fob has to be reset by the dealer to make it work again. This could be a costly and stressful experience therefore it's a great idea to know how much is a mazda key fob replacement to reset the system yourself.

Remove the battery from the system for 15 minutes. This will take out any remaining electrical current from the computer on board. Next, disconnect both the LF-ECU connector as well as the demand switch connectors. After that, test for continuity between the following terminals:

To program a new key, or a spare, insert it into the slot and turn the ignition to ON. The ignition should be turned off after about five minutes. The key information will now be saved to your car's computer, and the new fob will be able to start your car in the future. You can program as many fobs you would like, but only one should be used at any certain time. This prevents unauthorized people from copying the key and getting ahold of your vehicle. You can purchase a brand new mazda key fob key fob online, but you'll still need to go to an expert locksmith or dealer to cut it and programmed.