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

Whether you dropped your key fob on the floor or it stopped working, it's always an excellent idea to keep an extra key in your pocket. This article will provide everything you need to be aware of when adding, changing, or reprogramming your Mazda 3 key fobs.

Note: Some keys require programming by an experienced locksmith, whereas others do not. Make sure to make use of official Mazda replacements for your key fob.

How to add a spare key

You can add another key in the event that you don't have a spare key available or if you accidentally damage your existing one. You'll need to use a flathead screwdriver and the CR2025 replacement battery. Once you have these items, it's time to open the key fob and change the battery. Find the key release auxiliary. It's located underneath the metal component and is easy to find. Once you hit the button, the back cover should be removed immediately. Next, insert the screwdriver's head into the notch or the space at the top of the metal piece and pry it off.

After the auxiliary keys are removed, insert the new or spare key into the slot. Set the ignition to ON and wait for five seconds before setting it to off. This will add the new key's information to the system that will allow it to start your vehicle in the future.

It is only possible to program three keys to your Mazda 3. The last thing you want is to have more than two working key fobs and not being capable of getting your vehicle started. This is a safety precaution that is designed to block unauthorized users, such as valet drivers, from activating your key and thereby starting your car.

How do I reprogram a spare key?

If you have a spare key it's a good idea to know how to program it if the original key you had is lost or stolen. This will keep unauthorised persons from starting your car or taking it. This will work with any Mazda. You'll require two keys that are working for the reprogramming to begin. If you don't have two keys that function it's recommended to take your vehicle to a dealer to have this done.

Begin by putting yourself in the driver's seat and closing the door, except for the one that's been opened. Set the ignition to ON and then insert the first working key. Wait five seconds before removing the key. Repeat with the second key.

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

It's a good idea purchase an extra mazda 2 key replacement 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 in your local auto store. Be sure to go through reviews prior to purchasing to ensure that you don't purchase the wrong key fob that isn't compatible with your car.

How to change the battery on a spare key

There's nothing more frustrating than discovering that your key fob battery has died and you can't unlock your vehicle. It's simple to replace the battery yourself and save money at the dealer.

Press the auxiliary key button at the back of the keyfob. This will take out the metal key auxiliary and reveal two slots on the sides of the case. Put the flathead screwdriver in one of these slots, and gently remove the two parts of the case. After the battery is fully exposed, remove the case and put it in a place where you won't forget it.

Before you begin, make sure you have a new replacement battery. They are available at any retailer that sells batteries or at an Mazda dealer close to Winter Garden. The correct battery is vital to make sure that your keyfob functions correctly.

Next, put the new battery into place and replace the battery cap. Be careful not to scratch the rubber ring that holds the battery. The two halves should be pressed together until you hear the click.

How to reset the system's Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security measure. The car will not start if the key is stolen or lost, even if you've got an extra key fob. The key fob has to be reset by the dealer to make it work again. It can be a frustrating and costly experience. Therefore, it's recommended to learn how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect both the LF-ECU connector and the demand switch connectors. Check for continuity between the terminals.

Place the key in the slot and switch the ignition on. Switch off the ignition after approximately five seconds. The key's information will be transferred to your vehicle's computer, and the new fob will be able start your vehicle in the future. You can program as many fobs as need but only one can be used at any certain time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can purchase a brand new key fob on the internet, but you'll still have to visit an expert locksmith or dealer to cut it and get it programmed.