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

If you've dropped your key fob on the floor or it simply stopped working, it's always a good idea to have an extra key in your pocket. This article will go over everything you need to be aware of when changing, adding, and changing the programming of your Mazda 3 key fobs.

A word of warning: some keys require programming by a locksmith professional or dealer, whereas others don't. Be sure to only make use of official Mazda replacements for your key fob.

How to add a spare key

If you're unable to receive a spare key from the dealership when you buy your Mazda 3 or accidentally break the one you have Don't fret, there is still the option of adding another key. To accomplish this, you'll require a small screwdriver with a flat head and the new CR2025 batteries. Once you've got all the equipment, it is time to open the key fob. Locate the auxiliary key release. The button is on the underside of the metal part. It's easy to locate. Once you hit the button, the cover should be removed immediately. Next, insert the head of the screwdriver into the notch or spacing on the top of the metal piece and 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 turning it to off. This will add the new information on the key to the system, allowing it to start your car in the future.

It is only possible to program three keys in your mazda car key replacement 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, such as valet drivers, from activating your key and thereby launching your vehicle.

How do you reprogram an unrepaired key

If you have a spare key, it's a good idea to be aware of how to reprogram it in the event that your original key gets lost or stolen. This will stop unauthorised people from starting your car, or taking it. This will work with any Mazda. You will need two keys that are functioning to begin the reprogramming. If you don't own two working keys, you'll have to bring your vehicle to the dealership to have it done.

Start by stepping into driver's seat and closing all the doors except the one that is open. Turn the ignition on and then insert the first working key. Wait for five seconds, then take the key out and repeat the process with a second key.

After you've programmed your new key, you'll have three keys that you can use to start your vehicle in the future. Test each key to make sure that they're functioning properly before placing them away.

It's a good idea to purchase an extra Mazda 3 key fob, especially if you're a driver who is prone to losing keys or has other issues with it. You can buy one online or in your local automotive store. Make sure you go through reviews prior to purchasing to ensure that you don't purchase an item that isn't compatible with your vehicle.

How to Change the Battery on a spare key

It's awful to discover that your key fob has died, and you are locked out of your car. It's easy 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 take out the metal key and reveal two slots on the opposite side of the case. Put the flathead into one of these slots, and gently pry the two halves of the case apart. After the battery is fully exposed, take it out of the case and put it somewhere that you will not forget it.

Before you start, make sure that you have a new replacement battery. You can find these at any store that stocks batteries or at a Mazda dealer close to Winter Garden. Using the correct type of battery will ensure that your key fob works correctly.

Replace the cap on the battery, and then insert the new battery. Be careful not to damage the rubber ring on which the battery rests. Finally press the two halves of the key fob together until you hear the sound of a click.

How to Reset the Keyless Entry System

The Mazda 3 key fob is not just a convenience. It also serves as a security feature. If you lost your key or had it stolen, the car will not start even if it has the spare fob. The key fob must be reset by the dealer to allow it to work again. This can be a painful and costly process. Therefore, it's best to learn how to reset the system.

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

To program an entirely new key or spare, insert it into the slot and set the ignition to ON. Turn off the ignition after approximately five minutes. The key's information has been transferred to the computer of your vehicle and the new fob can start your car. You can program up to three fobs, however, you must only use one at a time. This will keep unauthorised individuals from stealing your key and gaining access to your car. You can purchase a replacement key fob online, however you'll still need to go to an expert locksmith or dealer to cut it and programmed.