14 Savvy Ways To Spend The Remaining Mazda 6 Key Budget How to Add, Change, and Reprogram a Mazda 3 Spare Key

It's a good idea always to keep a spare key on hand regardless of whether you lost the keyfob you were using or it was unable to function. This article will show you how to add, modify, and reprogramme your Mazda 3 keyfobs.

A word of warning Certain keys require programming by a locksmith professional or dealer, while others do not. Make sure you only use official Mazda replacements for your key fob.

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If you're unable to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break the one you have but don't worry, there is still the option of adding another key. To do this, you'll need a small flathead screwdriver and a new CR2025 battery. Once you've got the tools you can access the key fob and change the battery. Locate the key release auxiliary. The button is on the underside of the metal portion. It's easy to find. The cover that covers the back should come off as soon as you press the button. Then, you can insert the head of the screwdriver into the notch or the space at the top of the metal part and pry it off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Switch the ignition on and then wait for around five seconds before turning it to off. This will register the new key's information to the system that will allow it to start your vehicle in the future.

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

How do I reprogram an unrepaired key

It's a smart idea to know how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from opening your car or taking it. This should work with any Mazda. You'll need two keys that are working for the reprogramming to begin. If you don't own two keys that work, you should take your Mazda to the dealer to have this completed.

Start by getting into the driver's seat and shutting all doors, with the exception of the one that is open. Put the first working key in the slot, then set the ignition to ON. After five seconds, remove the key. Repeat with the second key.

After you've programmed your new key you should have 3 keys that will work to start your vehicle in the future. Test each key to ensure sure that they're functioning properly before putting them away.

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can buy one online or at a local automotive store, but be sure to read reviews before buying so you can avoid getting the wrong key fob compatible with your vehicle.

How to change the battery on a spare key

There's nothing more frustrating than discovering that the battery on your key fob died and you can't unlock your vehicle. It's easy to replace the battery yourself and save money at the dealer.


Press the auxiliary button on the back of the keyfob. This will take out the metal key and reveal a slot on each side of the case. Press the flathead into one of these slots and gently pry the two halves of the case apart. When the battery is completely exposed, take it out and place it in a safe place somewhere safe from being lost.

Be sure to have a new battery ready prior to starting. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The correct type of battery is crucial to ensure that your key fob functions correctly.

Then, put the new battery into place and replace the cap of the battery. Be careful not to damage the small rubber ring the battery sits on. Then press the two halves of the key fob together until you hear an audible click.

How to Reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenience. It also serves as an important security feature. If you lose your key or have it stolen the car won't start even if you have the spare fob. This is because the key fob has to be reset at the dealership in order to work again. It can be a costly and frustrating ordeal It's a good idea to learn how to reset the system yourself.

To reset the system, disconnect the battery for about 15 minutes. This will erase any residual electrical power in the on-board computer. Then, disconnect both LF-ECU connector and the demand switch connectors. Check continuity between the following terminals.

To program a new key or a spare, place it in the slot and turn the ignition to ON. Switch off the ignition after approximately five minutes. The key's information will be added to the vehicle's computer, and the new fob will be able to start your car in the future. You can program as many fobs as would like however only one must be used at any particular time. This will stop unauthorized individuals from stealing your keys and getting access to your vehicle. You can buy a new keyfob online, but it must be programmed and cut by an authorized dealer.