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

If you've dropped your key fob on the ground or it has stopped working, it's always a good idea to have an extra key available. This article will explain everything you need to know about adding, changing, and changing the programming of your Mazda 3 key fobs.

Be aware that some keys require programming from an expert locksmith, while others don't. Make sure you use only genuine Mazda replacements to replace your key fob.

How do I add a spare key?

If you're not lucky enough to find a spare key from the dealership when you buy your Mazda 3 or accidentally break your current key but don't worry, there's the option of adding another key. To do this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you've got the tools then it's time to open the key fob. Locate the auxiliary key release. It's located underneath the metal piece and is easy to locate. When you hit the button, the cover will fall off instantly. Then, place the screwdriver's head in the notch at the top or in the space, and pull the metal piece off.

Insert your new or spare key into the slot after removing the additional key. Turn on the ignition and wait for about five seconds, and then turn it to OFF. This will register the new key's details to the system and allow it to start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys on your Mazda 3. You don't want to utilize more than two key fobs to start your vehicle. This is a safeguard to stop unauthorised users from activating your keys and then starting your vehicle.

How to Reprogram a spare key

It's a smart idea to learn how you can reprogram a spare key in the event that your original key is lost or stolen. This will keep unauthorized people from stealing your car and starting it. This will work with any mazda 5 Replacement key. You will require two keys that are functioning for the reprogramming to begin. If you don't own two keys that work it's recommended to take your Mazda to the dealer to have this done.

Begin by stepping into the driver's seat and shutting all doors, with the exception of the one that is open. Put the first working key in the slot, and then turn 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. Before you store each key, make sure that it's working correctly.

It's a good idea buy a spare Mazda 3 key fob, particularly if you're a driver who is prone to losing keys or has other issues with it. You can buy one online or at a local automotive store. Make sure to go through reviews prior to purchasing to ensure that you don't purchase an item that isn't compatible with your car.

How do I change the battery using a spare key

It's awful to discover that your key fob has died and you're unable to unlock your car. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will release the metal auxiliary key and expose an opening on both sides of the case. The flathead should be inserted into one of these slots and then gently pry the two halves apart. After the battery is fully exposed, remove the case and place it somewhere that you will not forget about it.

Before you begin, make sure that you have a brand new replacement battery. They can be bought at any retailer that sells batteries or from a mazda keyless entry dealer in Winter Garden. The correct battery is crucial to ensure that your keyfob works correctly.

Replace the cap on the battery, and then insert the new battery. Be careful not damage the rubber ring that holds the battery. Finally, press the two halves of the key fob together until you hear the sound of a click.

How do I reset the system's Keyless Entry System

The key fob in your Mazda 3 is not only an option for convenience, it's an important security feature. The car will not start if the key is stolen or lost even if you have an extra fob. This is because the key fob has to be reprogrammed by the dealership in order to work properly. It can be a stressful and costly process. Therefore, it's best to learn how you can reset the system.

To reset the system, remove the battery for 15 minutes. This will clear any residual power from the on-board computer. Then, disconnect the LF ECU and demand switch connectors. After that, test for continuity between the following terminals:

To program a new key or a spare, insert it into the slot and turn the ignition to ON. Put the key in for about five seconds, then switch off. The key's details will be transferred to your vehicle's computer and the new fob will be able start your car in the future. You can program up to three fobs but you should only use one at each time. This will stop unauthorised people from copying the key and getting ahold of your car. You can purchase a new key fob online, however you'll need to visit an authorized locksmith or dealer to cut it and programmed.