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

It's a good idea to keep an extra key at hand in case you lose your keyfob, or it stopped working. This article will tell you how to add, change or reprogramme the Mazda 3 keyfobs.

Certain keys require programming by professional locksmiths, while others don't. Use only genuine Mazda replacements to replace your key fob.

How do I add a spare key?

You can add an additional key in case you don't have a spare key, or when you accidentally damage your current one. To accomplish this, you'll need a small flathead screwdriver and a new CR2025 battery. Once you've got these items, it is time to open the key fob. First look for the key release button for the auxiliary key. It's located on the underside of the metal portion and is easy to locate. The cover on the back should fall off when you press the button. Next, insert the screwdriver's head into the notch or space on the top of the metal component and pull it away.

After the auxiliary keys are removed, insert the new or spare key into the slot. Set the ignition to ON and wait for about five seconds before setting it to OFF. This will register the new key's information to the system that will 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 6 key 3. You don't want to utilize more than two keys to start your car. This is a security measure designed to prevent unauthorized users, like valet drivers who are not authorized to use your key and thereby 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 is lost or stolen. This will prevent unauthorised persons from abusing your vehicle and re-starting it. This process should work on any Mazda however you'll need two working keys to start the process of reprogramming. If you don't have two working keys, you'll need to bring your car to the dealer to get it done.

Start by stepping into the driver's position, and shutting all doors, with the exception of the one that is open. Insert the first working key into the slot, and then set the ignition to ON. 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 keys that you can use to start your vehicle in the future. Before you store each key, make sure that it's functioning properly.

It's a good idea buy a spare mazda key 3 key fob, particularly if you're a driver who frequently loses their key or has other issues with it. You can purchase one on the internet or at your local auto store. Be sure to review the reviews before buying 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

It's awful to discover that the key fob you used to use has gone out and you're not able to unlock your vehicle. It's easy 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 release the metal key that is used as an auxiliary key, and expose two slots on the sides of the case. Insert the flathead screwdriver into one of these slots, and gently pry apart the two sides of the case. After the battery is fully exposed, take it out of the case and place it in a spot where you'll never forget about it.

Before you start, make sure that you have a new replacement battery. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob works effectively.

Next, put the replacement battery in the correct place and replace the cap on the battery. Be careful not to scratch the small rubber ring that the battery sits on. Finally, press the two parts of the key fob together until you hear the sound of clicking.

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 a spare fob. The key fob needs to be reprogrammed by the dealer to allow it to work again. It's a difficult and costly process. Therefore, it's advisable to learn how you can reset the system.

To reset the system, unplug the battery for 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

To program a new key, or a spare, place it in the slot and set the ignition to ON. The key should remain in the ignition for around five seconds and then turn it off. The key's details will be transferred to your vehicle's computer and the new fob will be able start your vehicle in the future. You can program as many fobs as you want however only one should be utilized at any specific time. This will prevent unauthorized persons from copying the key and gaining access to your vehicle. You can purchase a new key fob online, however you'll still have to visit an authorized locksmith or dealer to cut it and programmed.