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

It's a good idea to have an extra key at hand no matter if you've dropped your keyfob, or it stopped working. This article will go over everything you must be aware of adding, changing, and changing your Mazda 3 key fobs.

Note: Some keys require programming by professional locksmiths, while others don't. Be sure to only use official Mazda replacements for your key fob.

How do I add an extra key

If you're not lucky enough to receive a spare key from the dealer when you buy your Mazda 3 or accidentally break your current one do not fret -- there's a way to add another key. You'll need to use the flathead screwdriver, as well as the CR2025 replacement battery. Once you've got these items, it's time to access the key fob and swap the battery. First, locate the auxiliary key release button. It's on the underside of the metal part and is easy to locate. Once you press the button, the cover should fall off right away. Then, insert the screwdriver's head in the notch at the top or into the space and pry the metal part off.

Insert your spare key or a new one into the slot after taking out the auxiliary key. Turn on the ignition and wait for five seconds, and then turn it to off. This will allow the system to recognize the new key and start your vehicle in the future.

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

How do you reprogram an unrepaired key

It's a smart idea learn how you can reprogram a spare key in the event that your original key is lost or stolen. This will prevent unauthorized people from starting your vehicle or taking it. This procedure should work with any Mazda but you'll need two keys working to begin the reprogramming process. If you don't own two keys that work it's recommended to take your car to a dealer to get this completed.

Begin by putting yourself in the driver's seat and shutting the door, excluding for the one that's already opened. Set the ignition to ON and then insert the first working key. Wait five seconds, then remove the key and repeat the process with a second working key.

Once you've finished programming your new key, you'll have three working keys you can use to start your vehicle in the future. Test each key to make sure that they're operating correctly before taking them off.

You should think about purchasing a spare mazda key fob 3 remote, especially in the event that your vehicle is prone to issues. You can purchase one on the internet or at your local auto store. Make sure you review the reviews before buying to ensure you don't buy an item that isn't compatible with your car.

How to change the Battery on a spare Key

It's awful to discover that the key fob you used to use has gone out, and you are in a position to not unlock your vehicle. It's not a problem to replace the battery and save yourself some money at the dealer.

The first step is to press the auxiliary key button located on the back of the key fob. This will release the metal key auxiliary and reveal slots on both sides of the case. The flathead should be inserted into one of these slots, and then gently push the two halves apart. Once the battery is fully exposed, take it out and place it in a safe place somewhere that you won't forget about it.

Before you begin, be sure you have a brand new replacement battery. They can be found at any retailer that sells batteries or at an Mazda dealer near Winter Garden. Using the right type of battery will ensure that your key fob is working perfectly.

Replace the cap on the battery and then put in the new battery. Be careful not to damage the small rubber ring that the battery is placed on. Finally press the two halves of the key fob until you hear the sound of a click.

How do you reset the Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It's also an element of security. The car won't start if the key is stolen or lost even if you have a spare fob. The key fob has to be reprogrammed by the dealer to enable it to function again. It can be a stressful and costly process. Therefore, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any residual electric current from the onboard computer. Then, disconnect the LF -ECU and demand switch connectors. Verify the continuity between the next terminals.

Put the key in the slot, and turn on the ignition. Stop the ignition after approximately five seconds. The key's information is stored in the car's computer and the new fob will start your car. You can program up to three fobs but you must only use one at each time. This prevents unauthorized people from copying your key and getting ahold of your vehicle. You can purchase a new keyfob on the internet, but it will still need to be cut and programmed by a dealer.