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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 just stopped working, it's best to have a spare key handy. This article will show you how to add, alter and re-programme your Mazda 3 keyfobs.

A word of caution Certain keys require programming by a locksmith professional or dealer, whereas other keys don't. Use only authentic Mazda replacements to replace your key fob.

How do I add a spare key

If you're not fortunate enough to receive a spare keys from the dealership when you buy your mazda car keys 3 or accidentally break the one you have do not fret -- there's a way to add another key. You'll need a flathead screwdriver, and a CR2025 new battery. Once you've got the tools you need, it's time to open the key fob. First find the button that allows you to release the key. It's located on the bottom of the metal part. It's easy to find. Once you press the button, the back cover should be removed immediately. Next, insert the screwdriver's head into the notch or space at the top of the metal piece and pull it away.

Insert the spare or new key into the slot after taking out the secondary key. Set the ignition to ON, and wait for around five seconds before setting it to off. This will register the new key's information into the system that will allow it to start your car in the future.

You can only program three keys on your Mazda 3. You don't want to have to use more than two keys to start your car. This is a security measure to stop unauthorized users from activating your keys and then starting your vehicle.

How do I reprogram a spare key

If you have a spare key it's a good idea know how to reprogram it in case your original key is stolen or lost. This will stop unauthorised people from taking your car and then starting it. This should work with any Mazda. You'll require two keys that are working for the reprogramming to begin. If you don't have the two working keys, you'll have to bring your car key technician to the dealership to complete the process.

Begin by stepping into the driver's seat and close all the doors with the exception of the one that is open. Set the ignition to ON and then insert the first working key. Take five seconds before removing the key. Repeat with the second key.

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

It's a good idea purchase an extra Mazda 3 key fob, particularly if you're a driver who frequently loses their key or has other issues with it. You can buy one online or in your local automotive store. Make sure you go through reviews prior to purchasing so that you don't get an item that isn't compatible with your car.

How do I change the battery on a spare Key

There's nothing worse than finding that the battery for your key fob has been damaged and you're unable to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

Press the auxiliary button on the back of the keyfob. This will remove the key auxiliary to reveal slots on both sides of the case. Put the flathead screwdriver in one of these slots and then gently pry apart the two parts of the case. When the battery is fully exposed, remove the case and place it in a spot where you'll never forget it.

Make sure you have a replacement mazda 3 key battery prior to starting. You can purchase them at any store that sells batteries or at a mazda keys replacement dealer close to Winter Garden. The right kind of battery is essential to ensure that your keyfob is working correctly.

Replace the cap of the battery and then put in the new battery. Be careful not damage the rubber ring that holds the battery. Then press the two parts of the key fob together until you hear the sound of clicking.

How can I reset the Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security feature. The car will not start if the key is lost or stolen, even if you've got an extra fob. The key fob needs to be reprogrammed by a dealer to allow it to work again. This could be a costly and frustrating ordeal, so it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electricity from the on-board computer. Next, disconnect both the LF-ECU connector and the demand switch connectors. Then, check continuity between the following terminals:

Put the key in the slot, and switch the ignition on. Switch off the ignition after approximately five seconds. The key information will now be transferred to your vehicle's computer, and the new fob will be able to start your car in the future. You can program up to three fobs however, 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 buy a new key fob online, however you'll still have to visit a dealer or locksmith to cut it and programmed.