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

If you've dropped your key fob on the ground or it just stopped working, it's always best to have an extra key in your pocket. This article will cover everything you should know about the process of adding, changing, and changing your Mazda 3 key fobs.

Note: Some keys require programming by an expert locksmith, while others do not. Be sure to only make use of official Mazda replacements for your key fob.

How do you add an extra key

If you're unable to find a spare key from the dealership when you purchase your mazda 2 Key 3 or accidentally break your current key, don't worry -- there's a way to add another key. You'll need an flat-head screwdriver and a CR2025 new battery. Once you have the items you need, it's time to open the key fob. Locate the key release auxiliary. It's located beneath the metal part. It's easy to find. The cover that covers the back should come off when you press the button. Then, place the screwdriver's head in the notch on top or the space, and pull the metal piece off.

Insert your spare key or a new one into the slot after you have removed the additional key. Switch the ignition on and wait for approximately five seconds, and then turn it to off. This will add the new key's information to the system and allow it to start your vehicle in the future.

It's important to know that you can only program up to three keys for your Mazda 3. The final thing you want is to have more than two working key fobs and not be in a position to get your car started. This is a safety measure that is designed to block 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 to reprogram a spare key in the event that your original key becomes lost or stolen. This will prevent unauthorised persons from stealing your car and starting it. This should work with any Mazda. You'll need two keys that are working to begin the reprogramming. If you don't have two keys that work, it's best to take your car to a dealer to get this done.

Begin by putting yourself in the driver's seat and close the door, with the exception for the one that's been opened. Place the first working key in the slot, and then turn the ignition to ON. For five seconds, remove the key and repeat the procedure with the second working key.

Once you've completed programming your new key, you'll have 3 keys that will work to start your vehicle in the future. Test each key to make sure that they're functioning properly before placing them away.

You should think about buying a spare Mazda 3 remote, especially if your car is prone to problems. You can buy one online or at your local auto store, but be sure to read reviews before buying so that you can avoid purchasing an item that isn't compatible with your car.

How to change the Battery on a spare key

There's nothing worse than finding that the battery for your key fob has failed and you are unable to unlock your vehicle. It's a good thing that it's simple to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will remove the metal 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 of the case apart. When the battery is fully exposed, take it out of the case and place it in a place where you won't forget about it.

Be sure to bring a new battery ready before you begin. They are available at any retailer that sells batteries or at a Mazda dealer close to Winter Garden. The right kind of battery is essential to ensure that your keyfob is working properly.

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

How do you reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also a security measure. If you lost your key or had it stolen the car will not start even if you have the spare fob. The key fob has to be reprogrammed by the dealer to allow it to work again. It can be a costly and Mazda 3 Spare Key frustrating ordeal It's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will remove any residual electrical current from the computer on board. Then, disconnect both LF-ECU connector and the demand switch connectors. Then, verify the continuity between the following terminals:

To program a new key, or a spare, Mazda 3 Spare Key insert it into the slot and turn the ignition to ON. Stop the ignition after approximately five seconds. The key's information has been added to the vehicle's computer and the new fob can start your car. You can program up to three fobs, however, you should only use one at each time. This will prevent unauthorised people from stealing your key and gaining access to your vehicle. You can purchase a brand new key fob online, however you'll still have to visit a locksmith or dealer in order to cut it and programmed.