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

If you've dropped your key fob on the floor or it stopped working, it's best to have a spare key handy. This article will cover everything you must learn about adding, changing, or programming your mazda 6 key 3 key fobs.

A word of caution: some keys require programming by a professional locksmith or dealer, whereas others do not. Only use genuine Mazda replacements to replace your key fob.

How to add a spare key

You can add an additional key if you don't have a spare key, or if you accidentally break your current one. You'll need an flat-head screwdriver and an CR2025 battery. Once you've got these tools, it's time to open the key fob and swap the battery. Locate the auxiliary key release. It's located under the metal piece and is easy to find. Once you hit the button, the back cover should slide off immediately. Then, you can insert the screwdriver's head in the notch at the top or the space, and pry the metal part off.

Once the auxiliary key is removed, insert your new or spare key into the slot. Set the ignition to ON and wait for around five seconds before setting it to OFF. This will register the new information on the key to the system and allow it to start your vehicle in the future.

It is only possible to program three keys on your Mazda 3. You don't want to have to utilize more than two key fobs in order to start your vehicle. This is a security precaution designed to prevent unauthorised users, such as 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 best to know how to program it in the event the original key you had is stolen or lost. This will stop unauthorised people from taking your car and then starting it. This will work with any Mazda. You'll require two keys that are functioning for the reprogramming to begin. If you don't own two keys that work it's recommended to take your vehicle to a dealer to get this done.

Start by stepping into the driver's position, and close all the doors with the exception of the one that is open. Place the working key in the slot, then set the ignition to the ON position. After five seconds, remove the key and repeat with the second working key.

Once you've finished programming your new key, you should have three working keys you can use to start your car in the future. Before placing each key in storage, make sure it's working properly.

It's a good idea to buy an extra Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can purchase one online or in your local automotive store. Make sure to look up reviews before you purchase to ensure that you don't purchase one that's not compatible with your vehicle.

How do I change the battery on a spare key

There's nothing more frustrating than discovering 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.

The first step is to press the auxiliary key button located on the back of the key fob. This will remove the auxiliary key and expose slots on both sides of the case. Press the flathead into one of these slots and gently pry the two halves apart. Once the battery is fully exposed, remove it and place it in a safe place somewhere you won't forget it.

Before you start, make sure that you have a brand new replacement battery. These batteries can be purchased from any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is crucial to ensure that your keyfob is working properly.

Next, put the replacement battery into place and replace the battery cap. Be careful not to damage the small rubber ring the battery is placed on. Then press the two halves of the key fob until you hear a click.

How to reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security measure. The car won't start if the key is lost or stolen even if you have a spare fob. The key fob must be reprogrammed by a dealer to allow it to work again. It can be a stressful and costly ordeal. Therefore, it's best to understand how you can reset the system.

To reset the system, remove the battery for around 15 minutes. This will remove any remaining power from the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

Insert the key into the slot, then turn the ignition ON. The key should remain in the ignition for about five seconds and then turn off. The key information is now added to the vehicle's computer and the new fob is able to start your vehicle. You can program as many fobs as desire however only one should be utilized at any certain time. This will prevent unauthorized people from stealing your key and gaining access to your car. You can purchase a new keyfob on the internet, but it still needs to be cut and programmed by an authorized dealer.