7 Small Changes That Will Make An Enormous Difference To Your Mazda 6 Key How to Add, Change, and Reprogram a Mazda 3 Spare Key

If you've dropped your key fob on the floor or it simply stopped working, it's always best to have an extra key in your pocket. This article will teach you how to add, modify and re-programme your Mazda 3 keyfobs.

A word of caution: some keys require programming by a locksmith professional or dealer, while other keys don't. Only use official Mazda replacements to replace your key fob.

How do you add an extra key

If you're not fortunate enough to receive a spare key from the dealer when you purchase your Mazda 3 or accidentally break the one you have Don't fret, there is still a way to add another key. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and a new CR2025 battery. Once you have these items and are ready to open up the key fob and replace the battery. First look for the button that allows you to release the key. It's on the underside of the metal piece and is easy to find. The cover that covers the back should come off the moment you press the button. Next, insert the screwdriver's head into the notch or spacing at the top of the metal part and pull it off.

Insert the spare or new key into the slot following the removal of the accessory key. Turn on the ignition and wait for five seconds, then turn it to off. This will add the new key's information into the system which will allow it to start your car in the future.

It's important to keep in mind that you can only program up to three keys for your Mazda 3. The most important thing is to have more than two functioning key fobs and not be capable of getting your vehicle started. This is a security measure designed to prevent unauthorised users, like valet drivers, from activating your key and thereby starting your car.

How to Reprogram a Spare Key

It's a smart idea to know how you can reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorised people from getting into your car and causing damage to it. This procedure should work with any Mazda however, you'll require two keys working to begin the reprogramming process. If you don't have two keys that function it's recommended to take your car to a dealer to get this done.


Start by stepping into driver's seat, closing all the doors except the one that is open. Turn the ignition on and then insert the first working key. Wait five seconds, then remove the key and repeat the process with the second key.

Once you've programmed your new key, you should have three working keys that you can use to start your vehicle in the future. Before placing each key in storage, make sure that it's working correctly.

You should consider buying a spare Mazda 3 remote, especially when your car is susceptible to issues. You can buy one online or at your local auto store. Make sure to go through reviews prior to purchasing to ensure that you don't get one that's not compatible with your car.

How do I change the battery using a spare key

There's nothing worse than discovering that the battery on your key fob been damaged and you're unable to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary button on the back of the key fob. This will remove the key that is used as an auxiliary key, and expose an opening on both sides of the case. Use the screwdriver's flathead to push it into one of these slots and gently pry apart the two halves of the case. Once the battery has been fully exposed, remove the case and put it in a spot where you'll never forget about it.

Before you start, make sure that you have a new replacement battery. They are available at any retailer that sells batteries or at a Mazda dealer close to Winter Garden. The right kind of battery is essential to ensure that your key fob functions correctly.

Replace the cap of the battery and then put in the new battery. Be careful not to scratch the rubber ring on which the battery rests. Press the two halves together until you can 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 a security feature. If you lose your key, or have it stolen the car won't start even if it has the spare fob. This is because the key fob needs to be reprogrammed at the dealership to work properly. This could be a costly and time-consuming process and it's a good idea to understand how to reset the system yourself.

To reset the system, unplug the battery for about 15 minutes. This will eliminate any remaining electrical power in the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Verify the continuity between the next terminals.

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. Put the key in for about five seconds, then switch it off. mazda key fob replacement G28CarKeys will be transferred to your vehicle's computer, and the new fob will be able start your vehicle in the future. You can program up to three fobs however, you must only use one at each time. This will prevent unauthorised people from stealing your keys and getting access to your car. You can purchase a new key fob on the internet, but you'll still have to visit a locksmith or dealer in order to cut it and get it programmed.