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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 it has stopped working, it's a good idea to have a spare key handy. This article will go over everything you need to know about adding, changing, or programming your Mazda 3 key fobs.

Certain keys require programming by an expert locksmith, while others do not. Be sure to only use genuine mazda replacement key replacements for Mazda 3 Spare Key your key fob.

How to Add a Spare Key

If you're not fortunate enough to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current one do not fret -- there is still a way to add another key. You'll need to use a flathead screwdriver and a new CR2025 battery. Once you've got these items and tools, you're ready to open the key fob. First find the button that allows you to release the key. It's on the underside of the metal component and is easy to locate. Once you hit the button, the cover should be removed immediately. Then, insert the screwdriver's tip into the notch on top or into the space and pry the metal part off.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and Mazda 3 Spare Key wait for approximately five seconds before turning it to OFF. This will register the new key's information to the system which will allow it to start your vehicle in the future.

You can only program three keys on your Mazda 3. You don't want to have to utilize more than two key fobs in order to start your car. This is a security measure designed to stop unauthorized users, like valet drivers, from activating your key and starting your vehicle.

How do you reprogram an unrepaired key?

It's smart to be aware of how to reprogram an extra key in the event that your original key is lost or stolen. This will prevent unauthorised persons from taking your car and then starting it. This method should work on any mazda key replacement but you'll need two keys that work to begin the process of reprogramming. If you don't have two working keys, you'll need take your vehicle to a dealership to complete the process.

Begin by putting yourself in the driver's seat and shutting the door, excluding for the one that's already opened. Set the ignition to ON and insert the first functioning key. Wait five seconds, then take the key out and repeat the process with a second working key.

Once you've finished programming your new key, you'll have three working keys you can use to start your vehicle in the future. Before placing each key in storage, make sure that it's working correctly.

It's a good idea to buy a spare Mazda 3 key fob, especially if you're someone who often loses your key or has other issues with it. It's possible to find one on the internet or at a local automotive store, but be sure to read reviews prior to purchasing so you aren't buying the wrong key fob 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 in a position to not unlock your vehicle. It's easy to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button that is located on the back of the key fob. This will remove the metal key that is used as an auxiliary key, and expose slots on both sides of the case. Put the flathead into one of these slots, and then gently pull the two halves apart. After the battery is fully exposed, remove the case and place it in a place where you won't forget about it.

Be sure to bring an extra battery in place prior to beginning. They can be found in any store that sells batteries or at an Mazda dealer near Winter Garden. Using the correct type of battery will ensure that your key fob works correctly.

Replace the cap on the battery, and then install the new battery. Be careful not to damage the small rubber ring that the battery is placed on. Press the two halves together until you can hear the click.

How to Reset the Keyless Entry System

The key fob in your mazda 5 key fob 3 is not only a convenience, it's also an important security feature. If you lost your key or had it stolen the car won't start even if you've got the spare key fob. This is because the key fob needs to be reprogrammed at the dealership in order to work properly. This can be an expensive and frustrating ordeal It's a good idea to know how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Then, disconnect the LF -ECU and demand switch connectors. Check for continuity between the terminals.

To program a new key, or a spare, place it in the slot and set the ignition to ON. Put the key in for around five seconds and then turn it off. The information from the key will 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 as you want however only one should be used at any given time. This will prevent unauthorized persons from copying the key and getting ahold of your vehicle. You can purchase a new keyfob on the internet, but it will still need to be programmed and cut by a dealer.