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

It's a good idea to keep a spare key on hand in case you lose the keyfob you were using or it stopped working. This article will explain everything you must learn about changing, adding, and programming your mazda cx 5 keyless entry 3 key fobs.

Note: Some keys require programming by a professional locksmith, while others do not. Be sure to only use official mazda cx 5 key fob replacement, read full article, replacements for your key fob.

How to add a spare key

You can also add a second key if you don't have a spare key, or in the event that you break the one you have. To do this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an CR2025 battery that's new. Once you've got the tools, it's time to access the key fob and change the battery. Locate the auxiliary key release. It's on the underside of the metal portion and is easy to locate. When you hit the button, the cover should fall off right away. Next, insert the head of the screwdriver into the notch or spacing at the top of the metal piece and pry it off.

Insert your spare or new key into the slot after removing the accessory key. 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 and allow it to start your vehicle in the future.

You can only program three keys to your mazda replacement key fob 3. The last thing you want is to have more than two functioning key fobs and not be in a position to get your vehicle started. This is a safety measure to prevent unauthorized users from activating your keys and then starting your car.

How do you reprogram a spare key

It's a smart idea to be aware of how to reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This process should work on any mazda 3 replacement key fob however, you'll require two keys that work to begin the process of reprogramming. If you don't have two keys that work then it's best to bring your car to a dealer to get this completed.

Begin by stepping into the driver's seat, close all the doors with the exception of the one that is open. Place the first working key into the slot, then turn the ignition to the ON position. Then wait five seconds before taking out the key. Repeat the process with the second key.

After you finish programming your new key you should have three keys that will allow you to start your vehicle in the future. Before placing each key in storage, make sure that it's functioning properly.

It's a good idea to purchase an extra Mazda 3 key fob, especially if you're a driver who is prone to losing keys or has other issues with it. You can purchase one online or in your local auto store. Make sure you look up reviews before you purchase to ensure that you don't purchase an item that isn't compatible with your car.

How to Change the Battery on a Spare Key

It's very frustrating to discover that the key fob you used to use has gone out and you're in a position to not unlock your vehicle. It's not a problem to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will release the key from the metal and reveal two slots on the opposite side of the case. Press the flathead into one of these slots and then gently push the two halves of the case apart. After the battery is fully exposed, remove the case and place it somewhere you will not forget about it.

Before you begin, be sure that you have a brand new replacement key for mazda 2 battery. They can be bought at any store selling batteries or from a Mazda dealer in Winter Garden. The correct battery is vital to ensure that your keyfob works correctly.

Replace the cap of the battery and then insert the new battery. Be careful not to scratch the rubber ring that holds the battery. Finally, press the two halves of the key fob together until you hear a click.

How to Reset the Keyless Entry System

The key fob on your Mazda 3 is not only a convenience, it's also an important security feature. The car will not start if your key is stolen or lost, even if you've got an extra key fob. This is because the key fob needs to be reprogrammed at the dealership in order to work again. This can be a costly and frustrating ordeal and it's a good idea to learn how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any residual electric current from the onboard computer. Then, disconnect both LF-ECU connector as well as the demand switch connectors. Check for continuity between the terminals.

To program the new key or spare, place it in the slot and turn the ignition to ON. The key should remain in the ignition for around five seconds, and then turn it off. The key's information has been added to the vehicle's computer and the new fob can start your vehicle. You can program up to three fobs however, you must only use one at each time. This will prevent unauthorized persons from copying the key and getting ahold of your vehicle. You can purchase a new key fob online, however you'll still need to visit a locksmith or dealer in order to cut it and get it programmed.