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

It's a good idea always to keep an extra key at hand no matter if you've dropped the keyfob or it stopped working. This article will provide everything you need to be aware of adding, changing, and programming your mazda key fob 3 key fobs.

A word of caution: some keys require programming by a locksmith professional or dealer, whereas other keys do not. Only use official Mazda replacements to replace your key fob.

How do you add an additional key

You can also add another key in the event that you don't have a spare key, or if you accidentally break your existing one. You'll need a flathead screwdriver, and an CR2025 battery. Once you've got all the equipment you need, it's time to open the key fob. First look for the key release button for the auxiliary key. It's located underneath the metal part and is easy to locate. The cover that covers the back should come off the moment you press the button. Next, insert the screwdriver's head into the notch or spacing on the top of the metal part and pull it off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition to ON, and wait for about five seconds before turning it to off. This will register the new key's information to the system, allowing it to start your vehicle in the future.

It is only possible to program three keys to 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 to stop anyone who is not authorized from activating your keys and launching your vehicle.

How to Reprogram a Spare Key

It's a smart idea to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will keep unauthorized people from taking your car and then starting it. This method should work on any Mazda however, you'll require two keys that work to begin the reprogramming process. If you don't have two keys that work, you should take your car to a dealer to have this done.

Start by stepping into the driver's position, and closing all the doors except the one that is open. Turn the ignition on and insert the first functioning key. Then wait five seconds before taking out the key. Repeat with the second 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 saving each key, be sure that it's functioning properly.

It's a good idea buy a spare Mazda 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. You can purchase one online or at your local automotive store, but be sure to read reviews before purchasing so that you aren't buying one that's not 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're unable to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the metal key auxiliary to reveal a slot on both sides of the case. Put the flathead screwdriver in one of these slots, and gently remove the two sides of the case. Once the battery is fully exposed, remove it and set aside the case somewhere you won't forget it.

Be sure to have an extra battery in place before you start. You can find these in any store that sells batteries or at an Mazda dealer close to Winter Garden. The correct battery is crucial to ensure that your keyfob is working correctly.

replace mazda key the cap on the battery and then insert the new battery. Be careful not to damage the small rubber ring the battery rests on. Finally, press the two parts of the key fob together until you hear a click.

How do you reset the Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It also serves as an important security feature. The car will not start if your key is stolen or lost, even if you've got a spare fob. This is because the key fob has to be reset at the dealership in order to function properly. It's a difficult and costly experience. Therefore, it's advisable to know how to reset the system.

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

Place the key in the slot, then switch the ignition on. Stop the ignition after approximately five seconds. The key's information is transferred to the computer of your vehicle and the new fob can start your car. You can program up to three fobs however, nearest you should only use one at one time. This will prevent unauthorised people from stealing your key and gaining access to your vehicle. You can buy a new key fob online, however you'll still need to visit an authorized locksmith or dealer to get it cut and programmed.