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

Whether you dropped your key fob on the floor or it just stopped working, it's always an excellent idea to keep a spare key on hand. This article will provide everything you must know about adding, changing, and reprogramming your Mazda 3 key fobs.

A word of caution: some keys require programming by a professional locksmith or dealer, while others don't. Make sure you only use genuine mazda key replacements for your key fob.

How do I add a spare key?

You can add an additional key if you don't have a spare key or if you accidentally break the one you already have. You'll need a flathead screwdriver, and a new CR2025 battery. Once you have these items you can open up the key fob and swap the battery. Locate the key release auxiliary. It's located on the underside of the metal portion and is easy to find. The cover that covers the back should come off the moment you press the button. Then, insert the head of the screwdriver into the notch or space at the top of the metal piece and then pull it off.

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

It is important to remember 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 in order to start your car. This is a security precaution designed to prevent unauthorized users, like valet drivers, from activating your key and starting your car.

How to Reprogram a Spare Key

It's a smart idea know how you can reprogram a spare key in the event that your original key becomes lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This process should work on any Mazda but you'll need two working keys to start the process of reprogramming. If you don't own two working keys, you'll need bring your car to the dealership to get it done.

Begin by getting into your driver's seat and close the door, with the exception for the one that's already opened. Place the working key into the slot, then set the ignition to the ON position. Wait five seconds, then take the key out and repeat the procedure with the second working key.

After you've programmed your new key, you'll have three working keys that you can use to start your vehicle in the future. Before placing each key in storage, make sure it's functioning correctly.

It's a good idea to buy a spare 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 buy one online or at your local auto store. Make sure you review the reviews before buying to ensure that you don't get a key fob which isn't compatible with your vehicle.

How do I change the battery using a spare key

There's nothing worse than discovering that the battery on your key fob failed and you are unable 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 remove the key from the metal and mazda 3 Key reveal the slots on both sides of the case. The flathead should be inserted into one of these slots and then gently pull the two halves apart. Once the battery is fully exposed, remove it and put it away somewhere that you won't forget about it.

Be sure to have an extra battery in place before you begin. They can be bought at any store selling batteries or mazda 3 Key from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob functions properly.

Then, put the new battery in the correct place and replace mazda key the cap of the battery. Be careful not to scratch the small rubber ring the battery rests on. Then press the two halves of the key fob together until you hear the sound of clicking.

How do you reset the Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security measure. The car won't start if your key is lost or stolen, even if you've got a spare fob. The key fob should be reset by the dealer to allow it to work again. This can be a costly and frustrating ordeal and it's a good idea to know how to reset the system yourself.

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

To program an entirely new key or spare, place it in the slot and set the ignition to ON. Keep the key in place for around five seconds and then switch off. The information from the key will be transferred to your vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program up to three fobs however, you must only use one at each time. This stops unauthorized individuals from copying the key and getting ahold of your car. You can purchase a new keyfob from the internet, however it still needs to be cut and programmed by an authorized dealer.