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

If you've dropped your key fob on the floor or it stopped working, it's a good idea to have an extra key in your pocket. This article will explain everything you should be aware of adding, changing, or reprogramming your Mazda 3 key fobs.

A word of warning Some keys require programming by a professional locksmith or dealer, whereas other keys don't. Make sure you use only genuine Mazda replacements to replace your key fob.

How to add an extra key

You can add an additional key if you don't have a spare key available or in the event that you break your current one. You'll need to use a flathead screwdriver and the CR2025 replacement battery. Once you've got these items you need, it's time to open the key fob. First look for the button that allows you to release the key. The button is on the underside of the metal part. It's easy to find. Once you hit the button, the back cover should slide off immediately. Then, place the screwdriver's head in the notch at the top or the space, and pull the metal piece off.

Insert the spare or new key into the slot following the removal of the additional key. Set the ignition to ON, and wait for around five seconds before setting 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 know that you can only program up to three keys on your Mazda 3. The one thing you don't want is to have more than two functioning key fobs but not be in a position to get your car started. This is a safety measure designed to stop unauthorized users, such as valet drivers who are not authorized to use your key and thereby starting your car.

How to Reprogram a spare key

It's a smart idea learn how you can reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorized persons from starting your car, or taking it. This should work with any mazda car key replacement. You'll need two keys that work for the reprogramming to begin. If you don't have two functioning keys, you'll need take your vehicle to the dealer to get it done.

Begin by getting into your driver's seat, and close the door, except for the one that's been opened. Set the ignition to ON and then insert the first working key. Then wait five seconds before taking out the key. Repeat with the second key.

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

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're a driver who has a tendency to lose their keys or has other issues with it. You can purchase one on the internet or at a local automotive store. Make sure you read reviews before purchasing to ensure you don't buy the wrong key fob that isn't compatible with your car.

How to change the Battery on a spare Key

There's nothing more frustrating than discovering that the battery in your key fob has been damaged and you're unable to unlock your car. Fortunately, it's easy to replace the battery and save some money at the dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will remove the key auxiliary to reveal an opening on both sides of the case. Press the flathead into one of these slots, and then gently pull the two halves apart. Once the battery has been fully exposed, remove the case and place it somewhere you will not forget it.

Be sure to have a new battery ready prior to starting. You can find these in any store that sells batteries or at an mazda key replacement (on the main page) dealer close to Winter Garden. The correct type of battery is essential to ensure that your key fob functions correctly.

Next, put the new battery in place and replace the battery cap. Be careful not to scratch the rubber ring on which the battery rests. Press the two halves together until you hear a click.

How do I reset the system's Keyless Entry System

The key fob that you have in your mazda 2 key 3 is not only an option for convenience, it's an important security feature. The car will not start if the key is lost or stolen, even if you've got an extra fob. The key fob needs to be reprogrammed by a dealer to allow it to work again. This can be a painful and costly process. So, it's best to learn how you can reset the system.

To reset the system, disconnect the battery for around 15 minutes. This will eliminate any residual electrical current from the computer on board. Then, disconnect both the LF-ECU connector as well as the demand switch connectors. Then, check continuity between the following terminals:

To program a new key or a spare, place it in the slot and Mazda Key Replacement turn the ignition to ON. The key should remain in the ignition for about five seconds and then switch it off. The key's information 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, but you must only use one at each time. This will stop unauthorized individuals from stealing your keys and gaining access to your vehicle. You can purchase a brand new key fob online, but you'll still have to visit an authorized locksmith or dealer to get it cut and programmed.