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

It's a good idea always to have an extra key at hand, whether you dropped the keyfob or it has stopped working. This article will teach you how to add, alter or reprogramme your Mazda 3 keyfobs.

Certain keys require programming by a professional locksmith, while others don't. Be sure to only make use of official 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 available or if you accidentally damage the one you have. To accomplish this, you'll require a small flathead screwdriver and a new CR2025 battery. Once you've got the tools then it's time to access the key fob to change the battery. First find the key release button for the auxiliary key. The button is on the underside the metal part. It's easy to find. When you press the button, the back cover should fall off right away. Then, insert the screwdriver's head in the notch at the top or in the space, and remove the metal part.

Insert your spare or new key into the slot after removing the auxiliary key. Set the ignition to ON and wait for around five seconds before turning it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. You don't want to utilize more than two key fobs in order to start your car. This is a security precaution designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and thereby launching your vehicle.

How do I 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 stolen or lost. This will stop unauthorised people from starting your vehicle or stealing it. This process is compatible with any Mazda but you'll need two working keys to start the process of reprogramming. If you don't own two working keys, you'll need bring your car to the dealership to have it done.

Start by stepping into the driver's seat and close all the doors, except the one that is open. Turn the ignition on and insert the first working key. Take five seconds before removing the key. Repeat the process with the second key.

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

It's a good idea buy a spare Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. It's possible to find one on the internet or at your local automotive store, but be sure to read the reviews prior to purchasing so you aren't purchasing one that's not compatible with your vehicle.

How to change the Battery on a spare Key

It's depressing to find out that your key fob has died, and you are locked out of your car. Luckily, it's easy to replace the battery and save some money at the dealership.

The first step is to press the auxiliary button on the back of the key fob. try this will release the key from the metal and reveal the slots on both sides of the case. Put the flathead into one of these slots and then gently pry the two halves apart. Once the battery is fully exposed, remove the case and place it somewhere you will not 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 near Winter Garden. Choosing the correct battery will ensure that your key fob works effectively.

Then, place the new battery in place and replace the battery cap. Be careful not to scratch the rubber ring that holds the battery. Then, press the two parts of the key fob together until you hear an audible click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also an element of security. If you lose your key, or have it stolen, the car will not start even if you've got the spare key fob. This is because the fob that you have to be reset at the dealership to work once more. This can be a costly and time-consuming process and it's a good idea to learn how to reset the system yourself.

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

To program a new key or a spare, insert it into the slot and set the ignition to ON. The key should remain in the ignition for around five seconds, and then turn off. The key information will now be transferred to your vehicle's computer, and the new fob will be able start your car in the future. You can program as many fobs you desire, but only one should be in use at any specific time. This will stop unauthorized individuals from stealing your keys and getting access to your vehicle. You can purchase a new key fob online, but you'll still have to visit an authorized locksmith or dealer to cut it and get it programmed.