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

It's a good idea always to have an extra key on hand, whether you dropped the keyfob or it was unable to function. This article will cover everything you need to learn about changing, adding, and programming your Mazda 3 key fobs.

A word of warning Some keys require programming by a locksmith professional or dealer, whereas other keys do not. Be sure to only use official mazda replacement keys replacements for your key fob.

How do you add an additional key

You can also add an additional key if you don't have a spare key available or in the event that you break your existing one. To accomplish this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you've got these items and tools, you're ready to open the key fob. First find the key release button for the auxiliary key. It's located underneath the metal piece and is easy to find. The cover on the back should fall off when you press the button. Then, insert the head of the screwdriver into the notch or space at the top of the metal part and then pull it off.

Insert your spare key or a new one into the slot after you have removed the secondary key. Turn on the ignition and wait for approximately five seconds, and then turn it to OFF. This will add the new key's information to the system which will allow it to start your vehicle in the future.

It is only possible to program three keys to your Mazda 3. The last thing you want is to have more than two working key fobs but not be in a position to get your vehicle started. This is a safety measure designed to prevent unauthorized users, like valet drivers, from activating your key and thereby launching your vehicle.

How do I reprogram a spare key

If you have a spare key, it's a good idea know how to program it if your original key is lost or stolen. This will stop unauthorized persons from stealing your car and starting it. This should work with any Mazda. You'll need two keys that are working to start the reprogramming process. If you don't have two working keys, you'll have to take your vehicle to the dealer to get it done.

Begin by getting in your driver's seat, and close the door, mazda 3 Spare Key except for the one that's been opened. Insert the first working key into 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.

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

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're someone who frequently loses their key or has other issues with it. You can buy one online or at your local automotive retailer, but make sure to read the reviews prior to purchasing so you can avoid getting one that's not compatible with your vehicle.

How do you change the battery with a spare key?

There's nothing more frustrating than finding that the battery in your key fob has died and you can't unlock your vehicle. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary button on the back of the keyfob. This will remove the key auxiliary and reveal slots on both sides of the case. Put the flathead into one of these slots and then gently pull the two halves apart. When the battery is completely exposed, remove it and put it away in a place where you will not forget it.

Be sure to bring a replacement mazda key battery prior to beginning. You can find these in any store that sells batteries or at a Mazda dealer close to Winter Garden. Using the correct type of battery will ensure that your key fob functions perfectly.

Replace the cap of the battery and then put in the new battery. Be careful not to scratch the small rubber ring that the battery is placed on. The two halves should be pressed together until you hear the click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It also serves as an important security feature. The car will not start if the key is lost or stolen even if you have a spare key fob. This is because the fob that you have to be reprogrammed at the dealership to function properly. This can be an expensive and time-consuming process It's a good idea to understand how to reset the system yourself.

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

Put the key in the slot and turn the ignition ON. Keep the key in place for about five seconds and then switch off. The key's information is added to the computer in your car and the new fob can start your vehicle. You can program up to three fobs however, you must only use one at each time. This will prevent unauthorized people from stealing your keys and getting access to your car. You can purchase a brand new keyfob online, but it must be cut and mazda 3 Spare Key programmed by an authorized dealer.