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

It's a good idea to have an extra key in your pocket, whether you dropped your keyfob or it was unable to function. This article will show you how to add, change, and reprogramme your mazda 5 key fob 3 keyfobs.

A word of caution Certain keys need to be programmed by a professional locksmith or dealer, whereas other keys don't. Use only official Mazda replacements to replace your key fob.

How do I add a spare key?

You can also add another key in the event that you don't have a spare key, or when you accidentally damage the one you have. To do this, you'll need a small screwdriver with a flat head and an CR2025 battery that's new. Once you've got the tools and are ready to access the key fob and replace the battery. First look for the key release button for the auxiliary key. The button is located beneath the metal part. It's easy to find. Once you press the button, the cover should slide off immediately. Then, you can insert the screwdriver's head in the notch on top or the space, and pull the metal piece off.

After the auxiliary keys are removed, insert the new or spare key into the slot. Set the ignition ON and wait for five seconds, and then turn it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

You can only program three keys to your Mazda 3. You don't want to use more than two key fobs to start your vehicle. This is a safety precaution designed to stop unauthorized users, like valet drivers, from activating your key and thereby launching your vehicle.

How to Reprogram a Spare Key

If you have a spare key it's a good idea to be aware of how to program it if your original key gets lost or stolen. This will prevent unauthorized people from starting your car or stealing it. This will work with any Mazda. You will require two keys that are functioning to begin the reprogramming. If you don't have two working keys, it's best to take your car to a dealer to get this completed.

Begin by getting into your driver's seat, and closing the door, except for the one that's been opened. Turn the ignition on and insert the initial working key. Take five seconds before removing the key. Repeat the process with the second key.

Once you've finished programming your new key, you'll 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.

You should consider buying an extra Mazda 3 remote, especially in cases where your car is prone to problems. It's possible to find one on the internet or at your local auto store, but be sure to read the reviews before buying so that you can avoid getting the wrong key fob compatible with your vehicle.

How to change the Battery on a spare key

There's nothing worse than discovering that the battery on your key fob gone out and you're not able to unlock your car. It's simple to replace 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 metal key auxiliary to reveal slots on both sides of the case. Press the flathead into one of these slots and then gently push the two halves apart. Once the battery is fully exposed, take it out and put it away somewhere you won't forget it.

Before you begin, make sure you have a new replacement battery. These batteries can be purchased at any retailer that sells batteries or from a mazda 2 key dealer in Winter Garden. Using the right type of battery will ensure that your key fob is working effectively.

Next, put the new battery in place and replace the cap on the battery. Be careful not damage the rubber ring that holds the battery. Press the two halves together until you can hear the click.

How to Reset the 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 your key is stolen or lost even if you have a spare key fob. This is because the key fob has to be reset at the dealership in order to work once more. It can be a stressful and costly ordeal. Therefore, it's best to understand how you can reset the system.

To reset the system, disconnect the battery for 15 minutes. This will eliminate any residual electric current from the onboard computer. Then, disconnect both the LF-ECU connector as well as the demand switch connectors. Then, check continuity between the following terminals:

Place the key in the slot, and switch on the ignition. Switch off the ignition after approximately five minutes. The key's information has been transferred to the computer of your vehicle and the new fob will start your vehicle. You can program any number of fobs you want however only one should be in use at any particular time. This stops unauthorized individuals from copying the key and getting ahold of your vehicle. You can purchase a new keyfob from the internet, however it must be programmed and cut by an authorized dealer.