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

If you've dropped your key fob on the ground or it has stopped working, it's always best to have a spare key handy. This article will provide everything you need to be aware of adding, changing, or reprogramming your mazda 5 key fob 3 key fobs.

Warning: Some keys require programming by an expert locksmith, while others don't. Make sure to use genuine Mazda replacements for your key fob.

How to Add a Spare Key

You can also add a second key if you don't have a spare key or if you accidentally damage the one you have. You'll need to use a flathead screwdriver, and the CR2025 replacement battery. Once you have the items, it is time to open the key fob. First find the key release button for the auxiliary key. The button is located beneath the metal portion. It's easy to locate. The back cover should come off when you press the button. Then, insert the screwdriver's head in the notch at the top or the space and pry the metal part off.

Insert your spare key or a new one into the slot following the removal of the auxiliary key. Turn the ignition on and wait for about five seconds, then set it to off. This will allow the system to recognize the new key and start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys for your Mazda 3. You don't want to utilize more than two key fobs to start your car. This is a security measure that is designed to block unauthorized users, such as valet drivers from activating your key and starting your vehicle.

How to reprogram a spare key?

If you have a spare key it's important to be aware of how to reprogram it in the event that your original key gets lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This should work with any Mazda. You'll need two keys that are working to begin the reprogramming process. If you don't have two working keys then it's best to bring your car to a dealer to have this done.

Begin by stepping into your driver's seat, and close the door, with the exception for the one that's been opened. Place the first working key into the slot, and then turn the ignition to ON. For five seconds, take the key out and repeat the procedure with the second working key.

Once you've completed programming your new key, you should have 3 keys that will allow you to start your car in the near future. Test each key to ensure sure that they're working properly before taking them off.

You should think about buying an extra Mazda 3 remote, especially when your car is susceptible to problems. You can purchase one online or at a local automotive store, but make sure to read reviews before buying so that you aren't purchasing one that's not compatible with your vehicle.

How to change the Battery on a spare key

It's very frustrating to discover that your key fob has died and you're unable to unlock your car. 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 take out the metal key and reveal the slots on both sides of the case. Press the flathead into one of these slots, and then gently pull the two halves apart. When the battery is fully exposed, remove the case and place it somewhere that you will not forget it.

Before you start, make sure you have a new replacement battery. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. Using the right 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 small rubber ring the battery rests on. Then, press the two parts of the key fob together until you hear the sound of a click.

How to reset the system's Keyless Entry System

The key fob inside your mazda keys replacement 3 is not only an option for convenience, it's an important security feature. If you lost your key or had it stolen the car won't start even if it has the spare fob. This is because the key fob has to be reset at the dealership in order to work again. This can be an expensive and frustrating ordeal, so it's a good idea to learn how to reset the system yourself.

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

Place the key into the slot, then turn the ignition ON. The key should remain in the ignition for around five seconds and then switch off. The key's information is added to the computer in your car and the new fob is able to start your car. You can program up to three fobs however, you must only use one at a time. This will prevent unauthorised people from stealing your keys and getting access to your car. You can purchase a new key fob online, but you'll still have to visit a locksmith or dealer in order to cut it and programmed.