How to Add, Change, and Reprogram a mazda key 3 Spare Key

It's a good idea always to keep an extra key at hand, whether you dropped the keyfob or it has stopped working. This article will tell you how to add, alter or reprogramme the Mazda key code 3 keyfobs.

A word of caution: some keys require programming by a locksmith professional or dealer, while others don't. Make sure you only use official Mazda replacements for your key fob.

How do you add an additional key

You can also add another key in the event that you don't have a spare key, or if you accidentally break the one you already have. You'll need a flathead screwdriver, and an CR2025 battery. Once you've got these items and are ready to open the key fob to change the battery. Locate the auxiliary key release. It's located on the underside of the metal part. It's easy to find. The back cover should come off as soon as you press the button. Next, insert the head of the screwdriver into the notch, or the spacing at the top of the metal component and then pull it off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON and wait for around five seconds before setting it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. The one thing you don't want is to have more than two functioning key fobs and not be capable of getting your vehicle started. This is a safety measure designed to stop unauthorized users, such as valet drivers, from activating your key and thereby starting your car.

How to Reprogram a spare key

If you have a spare key, it's a good idea to be aware of how to reprogram it in case 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 will require two keys that are functioning to begin the reprogramming. If you don't have two working keys then it's best to bring your Mazda to a dealer to get this done.

Begin by putting yourself in the driver's seat, and closing the door, except for the one that's opened. Put the first working key into the slot, then set the ignition to the ON position. For five seconds, take the key out and repeat with the second key.

After you've programmed your new key, you'll have three keys that be able to start your car in the future. Test each key to make sure that they're working properly before throwing them away.

It's a good idea to purchase an extra Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can purchase one online or in your local auto store. Make sure you go through reviews prior to purchasing to ensure that you don't purchase the wrong key fob that isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

There's nothing worse than discovering that the battery for your key fob has died and you can't unlock your car. Fortunately, it's easy to replace the battery and save some money at the dealer.

Press the auxiliary key button at the back of the keyfob. This will remove the metal key that is used as an auxiliary key, and expose a slot on both sides of the case. Insert the flathead screwdriver into one of these slots. Then, gently break the two parts of the case. Once the battery is fully exposed, take it out and put it away somewhere you won't forget it.

Before you begin, be sure you have a brand new replacement battery. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is essential to ensure that your keyfob works properly.

Then, put the new battery in the correct place and replace the cap on the battery. Be careful not to damage the small rubber ring that the battery sits on. Then, press the two parts of the key fob together until you hear an audible click.

How can I reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also a security measure. The car won't start if your key is lost or stolen, even if you've got a spare key fob. The key fob should be reprogrammed by the dealer to enable it to function again. It's a difficult and costly experience. Therefore, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect both LF-ECU connector as well as the demand switch connectors. Verify that the connections are in good order between the terminals.

Put the key in the slot, then turn the ignition ON. Leave the key in for about five seconds and then turn off. The key's details are now transferred to the computer of your vehicle and the new fob is able to start your vehicle. You can program as many fobs as you would like, but only one should be utilized at any given time. This will prevent unauthorized people from stealing your keys and getting access to your car. You can purchase a new keyfob from the internet, however it still needs to be programmed and cut by an authorized dealer.