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

It's a good idea to keep a spare key on hand regardless of whether you lost the keyfob you were using or it stopped working. This article will cover everything you should be aware of adding, changing, or changing your Mazda 3 key fobs.

Be aware that some keys require programming from an expert locksmith, while others don't. Make sure you only make use of official mazda key fob replacement 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 buy your Mazda 3 or accidentally break your current one, don't worry -- there is still an option to make another key. You'll need to use a flathead screwdriver, and an CR2025 battery. Once you've got the tools and are ready to open the key fob and swap the battery. First look for the button that allows you to release the key. The button is located on the underside the metal portion. It's easy to find. When you hit the button, the cover should slide off immediately. Then, insert the screwdriver head into the notch at the top or the space, and pull the metal piece off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Switch the ignition on and then wait for around five seconds, and then turn it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to keep in mind that you can only program up to three keys on your Mazda 3. You don't want to have to utilize more than two key fobs to start your car. This is a security measure to stop unauthorised users from activating your keys and then starting your vehicle.

How to Reprogram a Spare Key

If you have a spare key, it's important to be aware of how to program it if your original key gets stolen or lost. This will keep unauthorised persons from starting your car, or taking it. This will work with any Mazda. You'll need two keys that work for the reprogramming to begin. If you don't have two working keys, it's best to take your vehicle to a dealer to get this done.

Begin by stepping into your driver's seat, and closing the door, except for the one that's been opened. Set the ignition to ON and insert the initial working key. Wait five seconds, then take the key out and repeat the process with the second key.

Once you've programmed your new key, you'll have three working keys that you can use to start your vehicle in the future. Before saving each key, be sure that it's working correctly.

You should consider buying a spare Mazda 3 remote, especially in cases where your car is prone to problems. You can purchase one online or at your local automotive store, but be sure to read reviews prior to purchasing so you aren't buying the wrong key fob compatible with your car.

How do you change the battery on a spare key

It's very frustrating to discover that your key fob has died, and you are unable to unlock your car. It's simple to replace the battery yourself and save money 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 slots on both sides of the case. The flathead should be inserted into one of these slots, and gently pry the two halves of the case apart. Once the battery is fully exposed, take it out and set aside the case somewhere you won't forget it.

Before you begin, be sure that you have a brand new replacement battery. They can be found at any store that sells batteries or at an Mazda dealer close to Winter Garden. The correct 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 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 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 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 key fob needs to be reprogrammed by the dealership to work properly. It can be a frustrating and costly process. Therefore, it's best to learn how you can reset the system.

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

Place the key in the slot, and switch the ignition on. Keep the key in place for around five seconds, and then turn off. The key's information has been added to the vehicle's computer and the new fob will start your vehicle. You can program any number of fobs you want however only one must be in use at any specific time. This will keep unauthorised individuals from stealing your key and getting access to your vehicle. You can buy a new key fob online, but you'll still have to visit a locksmith or dealer in order to get it cut and programmed.