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

If you've dropped your key fob on the floor or it just stopped working, it's always best to have a spare key handy. This article will explain everything you should learn about adding, changing, or reprogramming your mazda key fob replacement 3 key fobs.

Note: Some keys require programming by professional locksmiths, while others do not. Make sure you only make use of official Mazda replacements for your key fob.

How do you add a spare key

If you're not fortunate enough to receive a spare keys from the dealership when you purchase your Mazda 3 or accidentally break the one you have do not fret -- there's the option of adding another key. To do this, you'll need a small screwdriver with a flat head and an CR2025 battery that's new. Once you've got these tools you can remove the key fob and swap the battery. Find the key release auxiliary. The button is located on the underside of the metal part. It's easy to find. The back cover should slide off the moment you press the button. Then, insert the screwdriver's head in the notch at the top or the space, and pull the metal piece off.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Switch the ignition on and wait for approximately five seconds, then turn it to OFF. This will add the new key's information into the system that will allow it to start your vehicle in the future.

You can only program three keys to your Mazda 3. The most important thing is to have more than two working key fobs and not being in a position to get your vehicle started. This is a security measure to stop anyone who is not authorized from activating your keys and launching your car.

How to Reprogram a spare key

If you have a spare key, it's a good idea be aware of how to program it in the event your original key is lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This procedure should work with any Mazda however, you'll require two working keys to start the reprogramming. If you don't own two working keys, you'll need take your vehicle to the dealership to have it done.

Begin by putting yourself in the driver's seat and closing the door, except for the one that's opened. Place the working key in the slot, then turn the ignition to ON. Wait for five seconds, then remove the key and repeat the procedure with the second working key.

After you've programmed 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 it's working properly.

You should consider buying a spare Mazda 3 remote, especially if your car is prone to problems. You can buy one online or at a local automotive store. Make sure to go through reviews prior to purchasing to ensure you don't buy the wrong key fob that isn't compatible with your car.

How do I 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 car. It's not a problem to replace the battery and save some money at the dealer.

Press the auxiliary button on the back of the keyfob. This will remove the key that is used as an auxiliary key, and expose an opening on both sides of the case. Press the flathead screwdriver into one of these slots, and gently remove the two halves of the case. When the battery is completely exposed, take it out and place the case somewhere you won't forget it.

Before you begin, be sure you have a brand new replacement battery. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is vital to make sure that your keyfob functions correctly.

Then, put the new battery in the correct place and replace the battery cap. Be careful not to damage the small rubber ring the battery rests on. The two halves should be pressed together until you hear the click.

How do you reset the Keyless Entry System

The key fob on your mazda keys replacement 3 is not only an extra convenience, but also an important security feature. The car won't start if the key is stolen or lost even if you have an extra fob. The key fob has to be reprogrammed by the dealer to allow it to work again. It's a difficult and costly experience. Therefore, it's advisable to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will remove any remaining electricity from the on-board computer. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Then, check continuity between the following terminals:

To program a new key or a spare, place it in the slot and set the ignition to ON. Leave the key in for around five seconds and then switch it off. The key information will now be saved to your car's computer and the new fob will be able to start your vehicle in the future. You can program up to three fobs, but you should only use one at a time. This will keep unauthorised individuals from stealing your keys and getting access to your vehicle. You can buy a new keyfob online, but it still needs to be cut and programmed by a dealer.