The 12 Most Obnoxious Types Of Users You Follow On Twitter How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the ground or it has stopped working, it's always an excellent idea to keep an extra key available. This article will go over everything you must be aware of when adding, changing, and reprogramming your Mazda 3 key fobs.

Note: Some keys require programming from professional locksmiths, while others don't. Only use official Mazda replacements to replace 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 buy your Mazda 3 or accidentally break the one you have do not fret -- there is still an option to make another key. To accomplish this, you'll need an inexpensive flathead screwdriver as well as the new CR2025 batteries. Once you've got the tools then it's time to open the key fob. First find the auxiliary key release button. It's located under the metal part and is easy to find. Once you hit the button, the back cover should slide off immediately. Then, put the screwdriver head into the notch at the top or in the space, and pull the metal piece off.

Insert your new or spare key into the slot following the removal of the additional key. Turn on the ignition and then wait for around five seconds before turning it to OFF. This will register the new key's details to the system that will allow it to start your car in the future.

It's important to note that you can only program up to three keys for your Mazda 3. You don't want to have to use more than two key fobs to start your vehicle. This is a safety measure designed to prevent unauthorised users, such as valet drivers from activating your key and thereby launching your vehicle.

How to Reprogram a Spare Key

It's a smart idea to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This will work with any Mazda. You'll require two keys that work to begin the reprogramming process. If you don't own two working keys then it's best to bring your Mazda to the dealer to have this done.


Begin by stepping into your driver's seat, and close the door, except for the one that's open. Insert the first working key in the slot, and then set the ignition to ON. For five seconds, remove the key and repeat the procedure with the second key.

After you finish programming your new key, you should have three keys that allow you to start your car in the near future. Before placing each key in storage, make sure it's working properly.

You should consider buying an extra Mazda 3 remote, especially if your car is prone to issues. You can purchase one on the internet or at a local automotive store. Make sure you go through reviews prior to purchasing to ensure that you don't get a key fob which isn't compatible with your vehicle.

How to change the battery on a spare key

It's awful to discover that your key fob is dead and you're unable to unlock your vehicle. Luckily, it's easy to replace the battery and save some cash at the dealership.

Press the auxiliary button on the back of the keyfob. This will remove the auxiliary key and expose slots on both sides of the case. Use the screwdriver's flathead to push it into one of these slots, and gently break the two halves of the case. When the battery is completely exposed, remove it and put it away somewhere safe from being lost.

Make sure you have an additional battery before you start. These batteries can be purchased from any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is vital to make sure that your keyfob functions properly.

Replace the cap of the battery and then replace the battery. Be mazda key replacement battery not damage the rubber ring that holds the battery. The two halves should be pressed together until you hear a click.

How can I reset the Keyless Entry System

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

To reset the system, disconnect the battery for about 15 minutes. This will take out any remaining electrical power in the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Check for continuity between the terminals.

Place the key into the slot, and turn on the ignition. Turn off the ignition after about five minutes. The key's information has been added to the vehicle's computer and the new fob is able to start your car. You can program as many fobs as need but only one can be used at any particular time. This will prevent unauthorised people from stealing your keys and gaining access to your car. You can purchase a replacement key fob online, however you'll still have to visit a dealer or locksmith to cut it and programmed.