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

If you've dropped your key fob on the ground or it just stopped working, it's best to have a spare key on hand. This article will explain everything you need to be aware of the process of adding, changing, and changing your Mazda 3 key fobs.

Warning: Some keys require programming by an experienced locksmith, whereas others do not. Make sure to use genuine Mazda replacements for your key fob.

How do I add a spare key?

If you're not fortunate enough to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one, don't worry -- there's a way to add another key. You'll need an flat-head screwdriver and a CR2025 new battery. Once you've got these tools, it's time to open the key fob and change the battery. First, locate the auxiliary key release button. It's located underneath the metal piece and is easy to find. When you hit the button, the cover should slide off immediately. Then, place the screwdriver's head into the notch at the top or the space and pry the metal part off.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition to ON, and wait for five seconds before turning it to off. This will allow the system to recognize the new key and 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 one thing you don't want is to have more than two working key fobs but not be in a position to get your car started. This is a security precaution that is designed to block unauthorized users, like valet drivers, from activating your key and thereby launching your vehicle.

How do you reprogram a spare key?

It's a smart idea know how to reprogram a spare key in the event that your original key becomes lost or stolen. This will stop unauthorised people from abusing your vehicle and re-starting it. This method should work on any Mazda however, you'll require two keys that work to begin the reprogramming. If you don't own two keys that work it's recommended to take your car to a dealer to get this completed.

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

Once you've programmed your new key, you'll have three working keys you can use to start your vehicle in the future. Test each key to make sure that they're functioning properly before throwing them away.

It's a good idea purchase a spare replacement mazda key (Get Source) 3 key fob, particularly if you're a driver who is prone to losing keys or has other issues with it. You can purchase one online or at your local auto store, but be sure to read reviews prior to purchasing so you aren't buying a key fob that's not compatible with your car.

How do you change the battery on a spare key

There's nothing worse than finding that the battery in your key fob has failed and you are unable to unlock your vehicle. It's simple 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 remove the key from the metal and reveal the slots on both sides of the case. Place the flathead in one of these slots, and then gently pull the two halves apart. Once the battery is fully exposed, take it out and place it in a safe place in a place where you will not forget it.

Be sure to have a new battery ready before you begin. These batteries can be purchased at any store that sells batteries or from a mazda 2 key dealer in Winter Garden. Choosing the correct battery will ensure that your key fob is working correctly.

Replace the cap of the battery and then replace the battery. Be careful not to scratch the small rubber ring the battery sits on. Press the two halves together until you can hear the click.

How can I reset the Keyless Entry System

The key fob that you have in your Mazda 3 is not only a convenience, it's also an important security feature. The car will not start if your key is lost or stolen, even if you've got an extra key fob. This is because the key fob has to be reprogrammed by the dealership in order to work properly. This can be a costly and time-consuming process and it's a good idea to know how to reset the system yourself.

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

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for around five seconds, and then turn it off. The key's information has been added to the vehicle's computer and the new fob will start your car. You can program as many fobs you want but only one can be used at any certain time. This will prevent unauthorized persons from copying the key and getting ahold of your vehicle. You can buy a new key fob on the internet, but you'll need to visit an authorized locksmith or dealer to get it cut and programmed.