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

If you've dropped your key fob on the ground or it has stopped working, it's always best to have an extra key in your pocket. This article will cover everything you must be aware of adding, changing, and programming your Mazda 3 key fobs.

Warning: Some keys require programming from an expert locksmith, while others don't. Be sure to only use genuine Mazda replacements for your key fob.

How to add a spare key

If you're not lucky enough to get a spare key from the dealership when you buy your mazda car keys 3 or accidentally break your current one do not fret -- there's still the option of adding another key. To do this, you'll need an incredibly small screwdriver, a flathead screwdriver, and a new CR2025 battery. Once you have these items and are ready to remove the key fob to change the battery. First find the key release button for the auxiliary key. It's located underneath the metal component and is easy to find. The back cover should come off as soon as you press the button. Next, insert the screwdriver's head into the notch or space on the top of the metal part and pry it off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and then wait for around five seconds, and then turn it to OFF. This will register the new key's information to the system which will allow it to start your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. You don't want to have to use more than two key fobs in order to start your car. This is a safety measure designed to prevent unauthorized users, like valet drivers, from activating your key and starting your car.

How to Reprogram a spare key

If you have a spare key it's best to know how to reprogram it in case the original key you had is stolen or lost. This will prevent unauthorized people from starting your vehicle or taking it. This process should work on any Mazda but you'll need two working keys to start the reprogramming process. If you don't have two working keys, you should take your car to a dealer to get this completed.

Begin by stepping into your driver's seat, and close the door, with the exception for the one that's open. Put the first working key in the slot, and then turn the ignition to ON. Then wait five seconds before taking out the key. Repeat the process with the second key.

After programming your new key you should have 3 keys that will be able to start your car in the near future. Before you store each key, make sure that it's working correctly.

You should think about purchasing an extra Mazda 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. Be sure to read reviews before purchasing to ensure that you don't purchase a key fob which isn't compatible with your car key replacement cost.

How do I change the battery on a spare key

There's nothing more frustrating than discovering that the battery for your key fob has been damaged and you're unable to unlock your vehicle. Fortunately, it's easy to replace the battery and save yourself some cash at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will remove the metal key that is used as an auxiliary key, and expose two slots on the sides of the case. The flathead should be inserted into one of these slots, and gently pry the two halves of the case apart. Once the battery is fully exposed, take it out of the case and put it somewhere you will not forget it.

Before you begin, make sure you have a new replacement battery. You can purchase them in any store that sells batteries or at an mazda car key replacement dealer close to Winter Garden. The right kind of battery is crucial to ensure that your keyfob is working properly.

Next, put the new battery in the correct place and replace the cap of the battery. Be careful not to damage the small rubber ring the battery rests on. 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 key code 3 is not only an option for convenience, it's an important security feature. If you lost your key or had it stolen the car will not start, even if you have the spare key fob. The key fob has to be reset by the dealer to enable it to function again. It can be a costly and frustrating ordeal therefore it's a great idea to learn how to reset the system yourself.

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

Insert the key into the slot, and turn the ignition ON. Stop the ignition after approximately five minutes. The key information will now be saved to your car's computer and the new fob will be able start your car in the future. You can program up to three fobs, but you must only use one at one time. This stops unauthorized individuals from copying the key and gaining access to your vehicle. You can purchase a new keyfob on the internet, but it must be programmed and cut by an authorized dealer.