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

If you've dropped your key fob on the ground or it stopped working, it's always an excellent idea to keep a spare key on hand. This article will cover everything you must be aware of when adding, changing, and changing your Mazda 3 key fobs.

Note: Some keys require programming from an experienced locksmith, whereas others don't. Make sure you only make use of official mazda 6 key fob replacements for your key fob.

How to add a spare key

You can also add another key in the event that you don't have a spare key, or in the event that you break your existing one. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and the new CR2025 batteries. Once you've got these items you need, it's time to open the key fob. First find the key release button for the auxiliary key. It's located underneath the metal component and is easy to find. When you hit the button, the back cover should fall off right away. Then, place the screwdriver's tip into the notch at the top or the space, and pry the metal part off.

Once the auxiliary key is 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 allow the system to recognize the new key and start your vehicle in the future.

It is important to remember that you can only program up to three keys on your Mazda 3. You don't want to use more than two keys to start your vehicle. This is a safety measure to stop anyone who is not authorized from activating your keys and starting your vehicle.

How to Reprogram a Spare Key

If you have a spare key it's important to know how to program it if your original key gets lost or stolen. This will keep unauthorised persons from starting your vehicle or stealing it. This process should work on any Mazda however you'll need two keys that work to begin the reprogramming process. If you don't own two working keys, you'll need bring your car to the dealership to complete the process.

Begin by getting in your driver's seat and shutting the door, excluding for the one that's opened. Put the first working key into the slot, then turn the ignition to ON. Take five seconds before removing the key. Repeat the process with the second key.

After you've programmed your new key, you should have 3 keys that will work to start your car in the near future. Test each key to make sure that they're working properly before putting them away.

You should consider buying a spare Mazda 3 remote, especially in cases where your car is prone to issues. You can purchase one online or at a local automotive store. Make sure you look up reviews before you purchase to ensure that you don't purchase one that's not 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 are unable to unlock your vehicle. It's easy to change the battery yourself and save money at the dealership.

The first step is to press the auxiliary key button that is located on the back of the key fob. This will remove the key made of metal and reveal the slots on both sides of the case. Put the flathead screwdriver in one of these slots. Then, gently pry apart the two halves of the case. Once the battery is fully exposed, take it out of the case and place it somewhere that you will not forget it.

Before you begin, be sure that 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. Using the correct type of battery will ensure that your key fob works properly.

Next, put the replacement battery in place and replace the battery cap. Be careful not damage the rubber ring on which the battery rests. Then press the two parts of the key fob together until you hear the sound of a click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It's also a security feature. The car won't start if the key is lost or stolen, even if you've got a spare fob. This is because the key fob needs to be reprogrammed at the dealership in order to work again. This can be an expensive and time-consuming process and it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Next, disconnect both the LF-ECU connector and the demand switch connectors. After that, test for continuity between the following terminals:

Insert the key into the slot, and switch on the ignition. Switch off the ignition after approximately five seconds. The key information will now be saved to your car's computer, and the new fob will be able to start your car in the future. You can program as many fobs as you want however only one must be used at any specific time. This will prevent unauthorized people from stealing your key and getting access to your vehicle. You can purchase a new key fob online, however you'll still need to go to a locksmith or dealer in order to cut it and programmed.