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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 simply stopped working, it's always best to have a spare key handy. This article will go over everything you need to be aware of when adding, changing, and changing the programming of your Mazda 3 key fobs.

Certain keys require programming from a professional locksmith, while others don't. Make sure to use genuine Mazda replacements for your key fob.

How do I add a spare key?

If you're not fortunate enough to find a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current one Don't fret, there is still a way to add another key. To accomplish this, you'll need a small flathead screwdriver and an CR2025 battery that's new. Once you've got these items and are ready to access the key fob to change the battery. Locate the auxiliary key release. It's located under the metal part and is easy to locate. The cover that covers the back should come off when you press the button. Then, you can insert the screwdriver's head into the notch at the top or the space and remove the metal part.

Insert the spare or new key into the slot after taking out the additional key. Set the ignition ON and then wait for around five seconds, and then turn it to OFF. This will add the new key's information into the system, allowing it to start your vehicle in the future.

You can only program three keys in your Mazda 3. The last thing you want is to have more than two functioning key fobs, and not be able to get your car started. This is a safety measure designed to stop unauthorized users, like valet drivers, from activating your key and thereby launching your vehicle.

How to Reprogram a Spare Key

If you have a spare key, it's a good idea be aware of how to program it in the event your original key is lost or stolen. This will keep unauthorized people from abusing your vehicle and re-starting it. https://www.autokeys-r-us.co.uk/mazda/ should work on any Mazda, though you'll need two keys that work to begin the process of reprogramming. If you don't have two keys that work, you should take your vehicle to a dealer to get this completed.

Begin by stepping into the driver's seat, shutting all doors, with the exception of the one that is open. Insert the first working key into the slot, then set the ignition to ON. Take five seconds before removing the key. Repeat with the second key.

After you finish programming your new key, you should have three keys that will work to start your car in the future. Test each key to make sure they're working correctly before putting them away.

It's a good idea purchase a spare Mazda 3 key fob, especially if your car is one who has a tendency to lose their keys or has other issues with it. You can purchase one online or at a local automotive store. Be sure to look up reviews before you purchase to ensure that you don't get a key fob which isn't compatible with your vehicle.

How to change the battery on a spare key

There's nothing more frustrating than discovering that the battery in your key fob has gone out and you're not able to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will release the key made of metal and reveal a slot on each side of the case. Press the flathead screwdriver into one of these slots. Then, gently break the two sides of the case. Once the battery is fully exposed, take it out and place it in a safe place in a place where you will not forget it.

Before you begin, make sure that you have a brand new replacement battery. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is crucial to ensure that your key fob functions properly.

Replace the cap on the battery and then put in the new battery. Be careful not to damage the small rubber ring that the battery is placed on. Finally press the two parts of the key fob until you hear an audible click.

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How to reset the system's Keyless Entry System

The key fob that you have in your Mazda 3 is not only an extra convenience, but also an important security feature. If you lost your key or had it stolen the car will not start, even if you have the spare fob. The key fob must be reprogrammed by the dealer to make it work again. This can be a painful and costly ordeal. Therefore, it's advisable to know how to reset the system.

Disconnect the battery from the system for 15 minutes. This will take out any remaining electricity from the onboard computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. After that, test for continuity between the following terminals:

Place the key into the slot, then switch the ignition on. Switch off the ignition after about five minutes. The information from the key will be added to the vehicle's computer and the new fob will be able start your vehicle in the future. You can program up to three fobs, however, you should only use one at each time. This prevents unauthorized people from copying the key and getting ahold of your car. You can purchase a new keyfob on the internet, but it still needs to be programmed and cut by a dealer.