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

It's a good idea always to keep an extra key in your pocket in case you lose your keyfob or it has stopped working. This article will cover everything you should be aware of the process of adding, changing, and reprogramming your Mazda 3 key fobs.

A word of warning: some keys require programming by a locksmith professional or dealer, whereas others do not. Be sure to only use official mazda 2 key replacements for your key fob.

How to add a spare key

You can add an additional key if you don't have a spare key or in the event that you break your current one. You'll need the flathead screwdriver, as well as a CR2025 new battery. Once you have the items you need, it's time to open the key fob. First find the key release button for the auxiliary key. It's located on the underside the metal part. It's easy to find. Once you hit the button, the cover will fall off instantly. Then, put the screwdriver's head in the notch on top or into the space and pull the metal piece off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Turn on the ignition and wait for five seconds before turning it to off. This will add the new information on the key to the system, allowing it to start your vehicle in the future.

It is important to remember that you can only program up to three keys for your Mazda 3. The most important thing is to have more than two working key fobs, and not be able to get your car started. This is a security precaution designed to stop unauthorized users, like valet drivers who are not authorized to use your key and thereby launching your vehicle.

How to Reprogram a spare key

If you have a spare key it's a good idea to be aware of how to program it in the event the original key you had is Lost Mazda keys or stolen. This will stop unauthorized persons from opening your car or taking it. This process is compatible with any Mazda however you'll need two working keys to start the reprogramming. If you don't own two working keys, you'll need to take your vehicle to the dealer to get it done.

Begin by putting yourself in the driver's seat, and shutting the door, excluding for the one that's already opened. Place the working key into 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 working key.

Once you've completed programming your new key, you should have 3 keys that work to start your car in the near future. Before saving each key, be sure it's working properly.

You should think about buying a spare Mazda 3 remote, especially in the event that your vehicle is prone to problems. You can purchase one online or at a local automotive store. Be sure to read reviews before purchasing to ensure you don't buy an item that isn't compatible with your car.

How do I change the battery on a spare key

It's a nightmare to discover that your key fob is dead, and you are in a position to not unlock your vehicle. It's easy to change the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will release the metal key and reveal the slots on both sides of the case. Put the flathead screwdriver in one of these slots. Then, gently remove the two parts of the case. Once the battery is fully exposed, remove the case and place it somewhere that you will not forget about it.

Be sure to have a new battery ready before you begin. You can purchase them at any retailer that sells batteries or at a Mazda dealer near Winter Garden. The correct type of battery is vital to ensure that your key fob functions properly.

Next, put the new battery in the correct place and replace the battery cap. Be careful not to damage the small rubber ring that the battery sits on. Finally press the two halves of the key fob together until you hear an audible click.

How to Reset a Keyless Entry System

The key fob in your Mazda 3 is not only an option for convenience, it's an important security feature. The car will not start if the key is lost or stolen, even if you've got an extra key fob. This is because the key fob needs to be reprogrammed at the dealership to function properly. This could be a costly and stressful experience therefore it's a great idea to understand how to reset the system yourself.

To reset the system, unplug the battery for about 15 minutes. This will eliminate any remaining electricity from the on-board computer. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Verify the continuity between the next terminals.

Place the key into the slot, and switch on the ignition. Turn off the ignition after about five minutes. The key's details are now stored in the car's computer and the new fob will start your vehicle. You can program as many fobs as you need however only one should be used at any given time. This will prevent unauthorized persons from copying the key and gaining access to your car. You can purchase a brand new keyfob online, however it still needs to be cut and programmed by an authorized dealer.