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

Whether you dropped your key fob on the ground or it stopped working, it's always a good idea to have an extra key in your pocket. This article will cover everything you need to know about changing, adding, and programming your mazda key copy 3 key fobs.

Be aware that some keys require programming by a professional locksmith, while others do not. Use only authentic Mazda replacements to replace your key fob.

How do I add a spare key?

You can add a second key if you don't have a spare key available or if you accidentally damage your existing one. To do this, you'll need a small screwdriver with a flat head and the new CR2025 batteries. Once you've got all the equipment and tools, you're ready to open the key fob. First look for the auxiliary key release button. The button is located on the bottom of the metal part. It's easy to find. The cover that covers the back should come off as soon as you press the button. Next, insert the head of the screwdriver into the notch or space on the top of the metal component and pull it away.

Insert your spare or new key into the slot following the removal of the additional key. Set the ignition to ON, and wait for around five seconds before setting it to off. This will register the new key's details to the system and allow it to start your car in the future.

It's important to note that you can only program up to three keys on your Mazda 3. The final thing you want is to have more than two functioning key fobs, and not be in a position to get your car started. This is a security measure to stop unauthorised users from activating your key fobs and starting your vehicle.

How to Reprogram a Spare Key

If you have a spare key it's a good idea know how to reprogram it in the event that your original key gets stolen or lost. This will stop unauthorized persons from opening your car or taking it. This will work with any Mazda. You'll require two keys that are working for the reprogramming to begin. If you don't have two functioning keys, you'll need to take your vehicle to the dealer to get it done.

Begin by stepping into your driver's seat and close the door, except for the one that's been opened. Place the working key in the slot, then set the ignition to ON. Take five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you should have three working keys you can use to start your car in the future. Before saving each key, be sure it's working properly.

It's a good idea to buy an extra Mazda 3 key fob, especially if you're someone who is prone to losing keys or has other issues with it. You can buy one online or in your local automotive store. Make sure to read reviews before purchasing to ensure that you don't purchase a key fob which isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

There's nothing worse than discovering that the battery in your key fob has been damaged and you're unable to unlock your vehicle. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary button on the back of the keyfob. This will release the metal key auxiliary to reveal an opening on both sides of the case. Press the flathead screwdriver into one of these slots and then gently pry apart the two sides of the case. Once the battery has been fully exposed, remove the case and place it somewhere that you will not forget it.

Be sure to bring an extra battery in place before you begin. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is essential to ensure that your keyfob is working properly.

Replace the cap of 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 halves of the key fob together until you hear a click.

How to reset the system's Keyless Entry System

The key fob on your Mazda 6 Key 3 is not only a convenience, it's also an important security feature. The car will not start if the key is stolen or lost even if you have a spare key fob. The key fob must be reset by the dealer to allow it to work again. It's a difficult and costly process. Therefore, it's recommended to know how to reset the system.

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

Insert the key into the slot and turn the ignition ON. Put the key in for around five seconds, and then switch off. The key information will now be saved to your car's computer, and the new fob will be able to start your car in the future. You can program as many fobs as want however only one should be used at a given time. This will stop unauthorized individuals from stealing your keys and getting access to your car. You can buy a new keyfob online, but it will still need to be programmed and cut by a dealer.