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

Whether you dropped your key fob on the floor or Mazda 3 Spare Key it simply stopped working, it's always recommended to keep a spare key handy. This article will go over everything you should be aware of when adding, changing, and changing your Mazda 3 key fobs.

Note: Some keys require programming from a professional locksmith, while others don't. Make sure to make use of official Mazda replacements for your key fob.

How do you add an extra key

If you're not lucky enough to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current one Don't fret, there's an option to make another key. To accomplish this, you'll require an inexpensive flathead screwdriver as well as the new CR2025 batteries. Once you've got the tools, it is time to open the key fob. First find the auxiliary key release button. It's on the underside of the metal portion and is easy to locate. The back cover should slide off when you press the button. Then, you can insert the screwdriver's head into the notch, or the spacing at the top of the metal part and pry it off.

After the auxiliary keys are removed, insert the new or spare key into the slot. Set the ignition to ON, and wait for around five seconds before setting it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It's important to know that you can only program up to three keys on your Mazda 3. The final thing you want is to have more than two working key fobs and not being in a position to get your car started. This is a safety measure designed to stop unauthorized users, like valet drivers who are not authorized to use your key and starting your car.

How to reprogram a spare key?

If you have a spare key it's a good idea be aware of how to reprogram it in case your original key gets lost or stolen. This will stop unauthorised people from taking your car and then starting it. This method should work on any Mazda, though you'll need two keys working to begin the reprogramming. If you don't own two working keys, it's best to take your Mazda to the dealer to have this done.

Begin by stepping into your driver's seat, and Mazda 3 Spare Key close the door, with the exception for the one that's been opened. Set the ignition to ON and insert the first working key. After five seconds, remove the key. Repeat the process with the second key.

Once you've completed programming your new key, you should have three keys that work to start your vehicle in the future. Before you store each key, make sure it's functioning correctly.

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're someone who frequently loses their key or has other issues with it. It's possible to find one on the internet or at your local automobile retailer, but make sure to read reviews before purchasing so that you can avoid getting one that's not compatible with your vehicle.

How do you change the battery on a spare key

There's nothing more frustrating than finding that the battery in your key fob has gone out and you're not able to unlock your vehicle. Luckily, it's easy to replace the battery and save some cash 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 that is used as an auxiliary key, and expose an opening on both sides of the case. Place the flathead in one of these slots, and gently pry the two halves apart. Once the battery has been fully exposed, remove the case and place it in a place where you won't forget about it.

Before you start, make sure that you have a brand new replacement battery. You can purchase them at any store that stocks batteries or at a Mazda dealer close to Winter Garden. The correct battery is essential to make sure that your keyfob functions properly.

Next, put the replacement battery in the correct place and replace the battery cap. Be careful not to damage the small rubber ring that the battery is placed on. Finally press the two halves of the key fob until you hear the sound of a click.

How to Reset a Keyless Entry System

The mazda key fob 3 key fob is not just a practical feature. It also serves as an element of security. If you lost your key or had it stolen the car won't start even if you've got the spare fob. The key fob must be reset by the dealer to enable it to function again. This can be a painful and costly ordeal. Therefore, it's recommended to learn how you can reset the system.

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

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. The key should remain in the ignition for around five seconds, and then switch it off. The key's information is transferred to the computer of your vehicle and the new fob will start your car. You can program up to three fobs, however, you should only use one at each time. This prevents unauthorized people from copying your key and gaining access to your car. You can purchase a brand new keyfob online, but it will still need to be programmed and cut by an authorized dealer.