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

It's a good idea to have an extra key at hand regardless of whether you lost your keyfob, or it was unable to function. This article will explain how to add, modify, and reprogramme your Mazda 3 keyfobs.

Warning: Some keys require programming from a professional locksmith, while others don't. Only use authentic mazda key replacements to replace your key fob.

How to add a spare key

If you're not fortunate enough to find a spare key from the dealership when you purchase your Mazda 3 or accidentally break the one you have do not fret -- there's an option to get another key. You'll need the flathead screwdriver, as well as a CR2025 new battery. Once you have these items and are ready to access the key fob and replace the battery. Find the auxiliary key release. It's on the underside of the metal component and is easy to locate. The cover on the back should fall off as soon as you press the button. Then, insert the head of the screwdriver into the notch or spacing on the top of the metal part and pry it off.

Insert your spare or new key into the slot after taking out the secondary key. Set the ignition to ON and wait for around five seconds before turning it to OFF. This will register the new key's details to the system which will allow it to start your car in the future.

You can only program three keys on your Mazda 3. You don't want to have to use more than two key fobs in order to start your vehicle. This is a security precaution designed to prevent unauthorised users, such as valet drivers from activating your key and starting your car.

How do I reprogram a spare key?

It's a smart idea to know how you can reprogram a spare key in the event that your original key gets lost or stolen. This will stop unauthorised people from taking your car and then starting it. This will work with any mazda key fob replacement. You'll require two keys that work to start the reprogramming process. If you don't own two working keys, you'll have to bring your vehicle to the dealership to complete the process.

Begin by stepping into the driver's seat and closing all the doors except the one that is open. Place the working key in the slot, and then turn the ignition to ON. Wait for five seconds, then take the key out and repeat the process with a second key.

Once you've finished programming your new key, you'll have three working keys that you can use to start your car in the future. Before storing each key, Mazda 3 Spare Key make sure it's functioning correctly.

It's a good idea to purchase a spare 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 buy one online or at a local automotive retailer, but make sure to read reviews before buying so you aren't buying the wrong key fob compatible with your car.

How do you change the battery using a spare key

There's nothing more frustrating than discovering that the battery in your key fob has been damaged and you're unable to unlock your car. It's not a problem to replace the battery and save yourself some money at the dealer.

Press the auxiliary key button on the back of the keyfob. This will remove the metal key and reveal a slot on each side 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 is fully exposed, take it out of the case and put it somewhere you will not forget about it.

Make sure you have an additional battery prior to beginning. You can purchase them at any store that sells batteries or at an Mazda dealer near Winter Garden. Choosing the correct battery will ensure that your key fob functions properly.

Then, place the new battery in place and replace the battery cap. Be careful not to damage the small rubber ring that the battery rests on. Finally, press the two halves of the key fob until you hear the sound of clicking.

How do I reset the 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 lost your key or had it stolen the car will not start even if you've got the spare key fob. This is because the key fob needs to be reset at the dealership in order to work again. It's a difficult and costly experience. So, it's best to learn how you can reset the system.

Disconnect the battery from the system for 15 minutes. This will take out any remaining electricity in the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

Place the key into the slot, and turn the ignition ON. Keep the key in place for about five seconds, then turn it off. The key's information will be transferred to your vehicle's computer, and the new fob will be able to start your car in the future. You can program as many fobs as you desire however only one must be utilized at any particular time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can purchase a brand new key fob online, however you'll need to visit an expert locksmith or dealer to get it cut and programmed.