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 a spare key on hand. This article will go over everything you must learn about changing, adding, and programming your Mazda 3 key fobs.

Note: Some keys require programming from an experienced locksmith, whereas others don't. Make sure you only use official Mazda replacements for your key fob.

How do you add an extra key

You can add an additional key if you don't have a spare key available or when you accidentally damage your existing one. To accomplish this, you'll need an inexpensive flathead screwdriver as well as an CR2025 battery that's new. Once you've got the tools, it's time to open up the key fob and swap the battery. First find the key release button for the auxiliary key. It's located under the metal piece and is easy to locate. Once you hit the button, the cover should be removed immediately. Next, insert the screwdriver's head into the notch or the space on the top of the metal part and pry it off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and wait for five seconds before turning it to off. This will allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. You don't want to have to use more than two key fobs to start your car. This is a safety measure to stop anyone who is not authorized from activating your key fobs and starting your car.

How to Reprogram a spare key

It's smart to know how to reprogram a spare key in the event that the original key is lost or stolen. This will prevent unauthorised persons from getting into your car and causing damage to it. This will work with any Mazda. You will need two keys that work to begin the reprogramming. If you don't have two keys that function then it's best to bring your vehicle to a dealer to get this completed.

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

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

It's a good idea purchase a spare mazda key replacement near me 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. You can find one online or at your local auto store, but be sure to read the reviews before buying so you aren't purchasing the wrong key fob compatible with your vehicle.

How to change the battery on a spare key

It's very frustrating to discover that the key fob you used to use has gone out and you're not able to unlock your vehicle. It's easy to replace the battery yourself and save money 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 auxiliary key and expose an opening on both sides of the case. The flathead should be inserted 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.

Be sure to bring a new battery ready before you start. You can find these in any store that sells batteries or at a Mazda dealer close to Winter Garden. Using the correct type of battery will ensure that your key fob functions effectively.

Next, put the replacement battery in its place and then replace the cap of the battery. Be careful not to damage the small rubber ring the battery is placed on. Press the two halves together until you hear the click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It also serves as a security feature. If you lose your key or had it stolen the car won't start, even if you have the spare fob. This is because the key fob has to be reprogrammed at the dealership to work once more. This can be a costly and stressful experience, so it's a good idea to understand how to reset the system yourself.

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

To program a new key or a spare, insert it into the slot and set the ignition to ON. The key should remain in the ignition for about five seconds, then turn off. The key information will now be added to the vehicle's computer and the new fob will be able start your car in the future. You can program up to three fobs but you should only use one at each time. This will stop unauthorized individuals from stealing your keys and gaining access to your car. You can purchase a replacement keyfob online, but it must be programmed and cut by an authorized dealer.