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

It's a good idea to have a spare key on hand regardless of whether you lost your keyfob, or it was unable to function. This article will cover everything you should be aware of when changing, adding, and reprogramming your mazda 3 car keys 3 key fobs.

A word of warning Certain keys require programming by a locksmith professional or dealer, whereas others don't. Only use genuine mazda key cut replacements to replace your key fob.

How do I add an extra key

You can add an additional key if you don't have a spare key available or when you accidentally damage your existing one. You'll need to use a flathead screwdriver, and an CR2025 battery. Once you've got the tools and are ready to open the key fob to change the battery. Locate the auxiliary key release. It's on the underside of the metal portion and is easy to locate. The back cover should come off when you press the button. Then, you can insert the screwdriver's head in the notch on top or in the space, and take the metal part away.

Once the auxiliary key is removed, insert the new or spare key into the slot. Turn the ignition on and wait for five seconds, and then turn it to OFF. This will add the new key's details to the system that will allow it to start your car in the future.

It's important to note that you can only program up to three keys on your Mazda 3. The last thing you want is to have more than two functioning key fobs and not being able to get your car started. This is a security precaution designed to prevent unauthorized users, such as valet drivers from activating your key and thereby starting your car.

How to Reprogram a spare key

It's a smart idea learn how you can reprogram an extra key in the event that 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 replacement key fob. You'll require two keys that are functioning to start the reprogramming process. If you don't have the two working keys, you'll have to bring your vehicle to the dealer to get it done.

Begin by putting yourself in the driver's seat and closing the door, except for the one that's open. Set the ignition to ON and insert the first working key. Wait five seconds, then remove the key and repeat the procedure with the second key.

After you've completed programming your new key, you'll have three keys that you can use to start your vehicle in the future. Test each key to make sure that they're working properly before throwing them away.

It's a good idea buy 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 on the internet or at your local auto store. Be sure to look up reviews before you purchase to ensure that you don't get the wrong key fob that isn't compatible with your vehicle.

How do you change the battery on a spare key

There's nothing worse than discovering that the battery on your key fob failed and you are unable to unlock your vehicle. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary key button at the back of the keyfob. This will release the metal key auxiliary to reveal an opening on both sides of the case. Put the flathead screwdriver in one of these slots and then gently remove the two parts of the case. When the battery is fully exposed, take it out of the case and place it somewhere that you will not forget it.

Make sure you have an extra battery in place prior to starting. They are available at any store that sells batteries or at an 2016 mazda 6 key fob programming dealer close to Winter Garden. Using the correct type of battery will ensure that your key fob is working correctly.

Next, put the new battery in its place and then replace the cap on the battery. Be careful not damage the rubber ring that holds the battery. The two halves should be pressed together until you hear the click.

How do I reset the system's Keyless Entry System

The key fob inside your mazda spare key 3 is not only a convenience, it's also an important security feature. The car won't start if your key is stolen or lost even if you have an extra key fob. This is because the fob that you have to be reprogrammed by the dealership in order to function properly. This can be a costly and frustrating experience, so it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will remove any residual electrical current from the computer on board. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check continuity between the following terminals.

Place the key into the slot, then switch the ignition on. Switch off the ignition after approximately five minutes. The information from the key will be added 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 a time. This will prevent unauthorised people from stealing your keys and getting access to your vehicle. You can purchase a new keyfob on the internet, but it'll still need to be programmed and cut by a dealer.