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

It's a good idea to have a spare key on hand, whether you dropped the keyfob or it was unable to function. This article will explain everything you should be aware of the process of adding, changing, and reprogramming your mazda key code 3 key fobs.

Note: Some keys require programming by an experienced locksmith, whereas others do not. Only use official Mazda replacements to replace your key fob.

How do I add an additional key

If you're not fortunate enough to get a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one, don't worry -- there's still an option to make another key. To accomplish this, you'll require a small flathead screwdriver and a new CR2025 battery. Once you've got the tools you can remove the key fob and change the battery. Locate the key release auxiliary. It's located on the underside the metal portion. It's easy to find. The back cover should slide off the moment you press the button. Next, insert the screwdriver's head into the notch or spacing at the top of the metal part and then pull it off.

Once the auxiliary key has been removed, insert your new or spare key into the slot. Turn on the ignition and wait for approximately five seconds before turning it to OFF. This will add the new key's information into the system, allowing it to start your car in the future.

You can only program three keys on your Mazda 3. The final thing you want is to have more than two functioning key fobs and not be capable of getting your vehicle started. This is a security precaution designed to prevent unauthorized users, like valet drivers from activating your key and starting your car.

how to open a mazda 3 key fob to Reprogram a Spare Key

It's a good idea to know how to reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorized persons from stealing your car and starting it. This will work with any mazda replacement key. You'll require two keys that work to start the reprogramming process. If you don't have the two working keys, you'll have to bring your vehicle to the dealership to get it done.

Begin by stepping into the driver's position, and shutting all doors, with the exception of the one that is open. Set the ignition to ON and insert the first working key. Then wait five seconds before taking out the key. Repeat the process with the second key.

Once you've finished programming your new key, you should have three keys that you can use to start your car in the future. Check each key to make sure that they're functioning properly before throwing them away.

You should consider buying an extra Mazda 3 remote, especially in cases where your car is prone to issues. You can purchase one online 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 car.

How to Change the Battery on a Spare Key

It's awful to discover that your key fob has died, and you are unable to unlock your car. It's easy to change the battery yourself and save money at the dealer.

The first step is to press the auxiliary button on the back of the key fob. This will take out the key made of metal and reveal an opening on each side of the case. Put the flathead screwdriver in one of these slots, and gently take apart the two parts of the case. When the battery is completely exposed, remove it and place it in a safe place somewhere that you won't forget about it.

Be sure to bring an extra battery in place prior to beginning. These batteries can be purchased at any store selling batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob is working effectively.

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 rests on. Finally press the two parts of the key fob until you hear an audible click.

How do you reset the Keyless Entry System

The key fob that you have in your mazda smart key 3 is not only a convenience, it's also an important security feature. The car won't start if your key is stolen or lost even if you have an extra fob. This is because the key fob has to be reprogrammed by the dealership in order to work properly. This can be an expensive and stressful experience It's a good idea to learn how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect both LF-ECU connector as well as the demand switch connectors. After that, test for continuity between the following terminals:

To program the new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds and then turn off. The key information will now be added to the vehicle's computer, and the new fob will be able start your car in the future. You can program up to three fobs but you should only use one at one time. This will prevent unauthorized persons from copying your key and gaining access to your car. You can purchase a brand new keyfob online, however it still needs to be programmed and cut by an authorized dealer.