"The Ultimate Cheat Sheet" On Mazda 6 Key How to Add, Change, and Reprogram a Mazda 3 Spare Key

If you've dropped your key fob on the ground or it simply stopped working, it's always an excellent idea to keep a spare key handy. This article will explain everything you need to learn about the process of adding, changing, and reprogramming your Mazda 3 key fobs.

Certain keys require programming from an expert locksmith, while others do not. Make sure you only use official Mazda replacements for your key fob.

How to Add a Spare Key

If you're not fortunate enough to receive a spare key from the dealer when you buy your Mazda 3 or accidentally break the one you have Don't fret, there is still an option to make another key. To do this, you'll need a small flathead screwdriver and an updated CR2025 battery. Once you've got the tools, it is time to open the key fob. First find the key release button for the auxiliary key. It's on the underside of the metal portion and is easy to find. Once you hit the button, the cover should slide off immediately. Then, insert the screwdriver head into the notch on top or into the space and remove the metal part.

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


It is important to remember that you can only program up to three keys on your Mazda 3. The one thing you don't want is to have more than two working key fobs, and not be able to get your car started. This is a security measure to stop anyone who is not authorized from activating your key fobs and starting your vehicle.

How to Reprogram a spare key

It's smart to know how you can reprogram an extra key in the event that your original key is lost or stolen. This will stop unauthorised people from starting your vehicle or stealing it. This will work with any Mazda. You'll require two keys that are functioning to begin the reprogramming process. If you don't own two working keys, you'll need take your vehicle to the dealership to have it done.

Begin by getting into your driver's seat and close the door, with the exception for the one that's been opened. Place the working key into the slot, and then turn the ignition to ON. After five seconds, take the key out and repeat the procedure with the second working key.

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

It's a good idea purchase a spare Mazda 3 key fob, especially if you're a driver who frequently loses their key or has other issues with it. You can buy one online or at your local auto store. Be sure to look up reviews before you purchase to ensure you don't buy one that's not compatible with your car.

How do you change the battery using a spare key

It's depressing to find out that your key fob has failed, and you are unable to unlock your vehicle. It's not a problem to replace the battery and save yourself some 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 and reveal the slots on both sides of the case. Place the flathead in one of these slots and gently pry the two halves of the case apart. Once the battery has been fully exposed, remove the case and place it in a place where you won't forget it.

Be sure to bring an extra battery in place before you begin. They are available at any store that sells batteries or at an Mazda dealer close to Winter Garden. Using the right type of battery will ensure that your key fob works correctly.

Next, put the replacement battery into place and replace the cap of the battery. Be careful not to scratch the small rubber ring the battery is placed on. Then, press the two halves of the key fob until you hear the sound of clicking.

How do I reset the Keyless Entry System

The key fob in your Mazda 3 is not only an extra convenience, but also an important security feature. If you lost your key or had it stolen, the car will not start even if you have the spare fob. This is because the fob that you have to be reprogrammed by the dealership in order to work again. It can be a stressful and costly experience. Therefore, it's best to understand how you can reset the system.

To reset the system, unplug the battery for approximately 15 minutes. This will remove any residual electrical power in the on-board computer. Then, disconnect mazda verisa key replacement for the LF-ECU and the demand switch connectors. Check continuity between the following terminals.

Place the key into the slot, then turn on the ignition. The key should remain in the ignition for around five seconds and then switch off. The key information is now transferred to the computer of your vehicle and the new fob will start your vehicle. You can program as many fobs you would like however only one must be utilized at any particular time. This stops unauthorized individuals from copying the key and gaining access to your vehicle. You can buy a new key fob online, but you'll still need to go to an authorized locksmith or dealer to have it cut and programmed.