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

It's a good idea always to keep an extra key in your pocket regardless of whether you lost your keyfob or it stopped working. This article will show you how to add, alter and re-programme your mazda 3 spare key 3 keyfobs.

A word of warning Certain keys need to be programmed by a locksmith professional or dealer, whereas other keys don't. Be sure to only use official Mazda replacements for your key fob.

How do I add an extra key

If you're not lucky enough to get a spare key from the dealership when you purchase your Mazda 3 or accidentally break the one you have do not fret -- there's still an option to make another key. You'll need to use a flathead screwdriver and a new CR2025 battery. Once you have the items and Mazda 3 Spare Key tools, you're ready to open the key fob. First look for the key release button for the auxiliary key. It's located under the metal part and is easy to locate. The back cover should slide off when you press the button. Next, insert the screwdriver's head into the notch or the space on the top of the metal component and then pull it off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Set the ignition to ON and wait for five seconds before setting it to OFF. This will register the new information on the key to the system, allowing it to start your car in the future.

It's important to know that you can only program up to three keys on your Mazda 3. You don't want to have to utilize more than two key fobs in order to start your car. This is a precautionary measure to prevent unauthorized users from activating your keys and then starting your car.

How do I reprogram a spare key

If you have a spare key it's best to know how to reprogram it in case your original key is lost or stolen. This will prevent unauthorised persons from stealing your car and starting it. This procedure should work with any Mazda, though you'll need two working keys to begin the reprogramming. If you don't have two keys that work it's recommended to take your Mazda to the dealer to get this done.

Begin by stepping into your driver's seat, and close the door, with the exception for the one that's open. Turn the ignition on and insert the first functioning key. Wait five seconds, then take the key out and repeat the process with a second working key.

Once you've completed programming your new key, you'll have 3 keys that work to start your car in the near future. Before saving each key, be sure it's working properly.

It's a good idea purchase a spare Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can buy one online or at your local automotive store, but make sure to read reviews before purchasing so that you can avoid purchasing the wrong key fob compatible with your vehicle.

How do I change the battery on a spare key

It's a nightmare to discover that your key fob has died and you're in a position to not unlock your vehicle. It's a good thing that it's simple to replace the battery and save yourself some cash at the dealership.

The first step is to press the auxiliary key button on the back of the key fob. This will release the metal key auxiliary and reveal a slot on both sides of the case. Press the flathead into one of these slots, and gently pry the two halves apart. When the battery is completely exposed, take it out and place it in a safe place somewhere safe from being lost.

Make sure you have an extra battery in place before you start. They are available in any store that sells batteries or at a Mazda dealer close to Winter Garden. Choosing the right battery will ensure that your key fob works effectively.

Replace the battery cap and then insert the new battery. Be careful not to scratch the rubber ring that holds the battery. Finally press the two halves 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 an element of security. The car won't start if the key is stolen or lost, even if you've got an extra fob. This is because the key fob needs to be reset at the dealership to work once more. This can be an expensive and frustrating ordeal therefore it's a great idea to learn how to reset the system yourself.

To reset the system, disconnect the battery for approximately 15 minutes. This will take out any remaining electricity in the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

Place the key into the slot, then switch on the ignition. Turn off the ignition after approximately five minutes. The key information is now transferred to the computer of your vehicle and the new fob is able to start your car. You can program as many fobs as you would like however only one must be in use at any specific time. This will prevent unauthorized people from stealing your keys and gaining access to your car. You can purchase a new keyfob online, however it'll still need to be programmed and cut by a dealer.