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

Whether you dropped your key fob on the ground or it simply stopped working, it's an excellent idea to keep an extra key in your pocket. This article will provide everything you should be aware of when changing, adding, and changing your Mazda 3 key fobs.

Note: Some keys require programming by an experienced locksmith, whereas others don't. Only use authentic Mazda replacements to replace your key fob.

How do I add an additional key

You can add an additional key if you don't have a spare key available or when you accidentally damage the one you have. You'll need a flathead screwdriver and the CR2025 replacement battery. Once you've got these items you need, it's time to open the key fob. First find the key release button for the auxiliary key. It's on the underside of the metal piece and is easy to find. Once you press the button, the back cover should be removed immediately. Then, insert the screwdriver's head into the notch or the space at the top of the metal piece and mazda 3 spare Key then pull it off.

Once the auxiliary key is removed, insert the new or spare key into the slot. Set the ignition to ON and wait about five seconds before setting it to off. This will register the new information on the key to the system which will allow it to start your vehicle in the future.

It's important to know that you can only program up to three keys for your Mazda 3. The final thing you want is to have more than two working key fobs and not being capable of getting your vehicle started. This is a security measure designed to stop unauthorized users, like valet drivers who are not authorized to use your key and thereby launching your vehicle.

How do you reprogram a spare key

If you have a spare key, it's best to be aware of how to program it in the event the original key you had is lost or stolen. This will prevent unauthorised persons from getting into your car and causing damage to it. This method should work on any Mazda but you'll need two working keys to begin the reprogramming process. If you don't own two working keys, you should take your vehicle to a dealer to get this completed.

Begin by getting into your driver's seat and close the door, except for the one that's been opened. Turn the ignition on and insert the first working key. Wait five seconds before removing the key. Repeat the process with the second key.

After you've programmed your new key, you'll have three working keys that you can use to start your vehicle in the future. Test each key to be sure that they're operating correctly before putting them away.

It's a good idea buy an extra 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 find one online or at a local automotive store, but be sure to read reviews before purchasing so that you can avoid purchasing the wrong key fob compatible with your car.

How to change the battery using a spare key

It's a nightmare to discover that your key fob has failed and you're unable to unlock your vehicle. It's easy 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 release the key made of metal and reveal a slot on each side of the case. Press the flathead screwdriver into one of these slots. Then, gently take apart the two halves of the case. Once the battery is fully exposed, remove the case and place it in a spot where you'll never forget it.

Make sure you have an extra battery in place before you start. They can be found at any store that sells batteries or at an Mazda dealer close to Winter Garden. The right kind of battery is crucial to ensure that your keyfob is working properly.

Replace the battery cap and then insert the new battery. Be careful not to damage the small rubber ring that the battery rests on. The two halves should be pressed together until you hear a click.

How to Reset a Keyless Entry System

The key fob in your Mazda 3 is not only an extra convenience, but also an important security feature. The car won't start if the key is lost or stolen, even if you've got an extra fob. The key fob should be reprogrammed by the dealer to make it work again. This can be an expensive and time-consuming process therefore it's a great idea to learn how to reset the system yourself.

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

Place the key into the slot, and switch the ignition on. Turn off the ignition after approximately five seconds. The key's information has been added to the computer in your car and the new fob can start your car. You can program up to three fobs but you should only use one at a time. This will prevent unauthorised people from stealing your key and gaining access to your vehicle. You can purchase a brand new key fob online, but you'll still have to visit a locksmith or dealer in order to cut it and programmed.