The Reason You Shouldn't Think About Improving Your Mazda 6 Key How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the floor or it stopped working, it's always a good idea to have a spare key handy. This article will explain everything you must learn about adding, changing, or changing your Mazda 3 key fobs.

Note: Some keys require programming from an experienced locksmith, whereas others don't. Be sure to only use official Mazda replacements for your key fob.

How do you add a spare key

If you're unable to find a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one, don't worry -- there's still an option to get another key. To do this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you've got all the equipment, it is time to open the key fob. First look for the key release button for the auxiliary key. It's located under the metal portion and is easy to find. When you press the button, the back cover will fall off instantly. Then, put the screwdriver's tip into the notch on top or the space and remove the metal part.

After the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition to ON, and wait for around five seconds before setting it to off. This will register the new key's details to the system that will allow it to start your car in the future.

You can only program three keys in your Mazda 3. mazda 3 replacement key want is to have more than two working key fobs but not be able to get your car started. This is a safeguard to stop anyone who is not authorized from activating your key fobs and starting your car.

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 or stolen. This will stop unauthorised people from starting your car, or stealing it. This will work with any Mazda. You'll require two keys that are functioning for the reprogramming to begin. If you don't have two working keys, you'll need to take your vehicle to the dealer to get it done.

Start by getting into the driver's position and close all the doors with the exception of the one that is open. Insert the first working key into the slot, and then set the ignition to ON. Then wait five seconds before taking out the key. Repeat with the second key.

Once you've programmed your new key, you'll have three keys that you can use to start your car in the future. Check each key to make sure they're working correctly before throwing them away.

It's a good idea purchase a spare Mazda 3 key fob, particularly if you're a driver who is prone to losing keys or has other issues with it. It's possible to find one on the internet or at your local auto store, but make sure to read the reviews before purchasing so that you can avoid purchasing a key fob that's not compatible with your car.

How to change the battery on a spare key?

There's nothing worse than discovering that your key fob battery has failed and you are unable to unlock your vehicle. It's not a problem to replace the battery and save yourself some money at the dealer.

Press the auxiliary key button on the back of the keyfob. This will detach the key from the metal and reveal an opening on each side of the case. Place the flathead in one of these slots, and then gently pull the two halves apart. When the battery is completely exposed, remove it and set aside the case in a place where you will not forget it.


Be sure to have an additional battery prior to starting. They can be found in any store that sells batteries or at an Mazda dealer near Winter Garden. The right type of battery is essential to ensure that your keyfob is working properly.

Replace the battery cap and then install the new battery. Be careful not to damage the rubber ring on which the battery rests. Finally, press the two halves of the key fob together until you hear an audible click.

How do you reset the Keyless Entry System

The key fob on your Mazda 3 is not only an added convenience, but it's also an important security feature. If you lose your key, or have it stolen, the car will not start even if you have the spare fob. The key fob must be reprogrammed by a dealer to allow it to work again. It can be a costly and time-consuming process 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 take out any remaining electrical current from the computer on board. Then, disconnect both LF-ECU connector and the demand switch connectors. Verify the continuity between the next terminals.

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds, then switch off. The key information is now stored in the car's computer and the new fob is able to start your vehicle. You can program as many fobs as you would like but only one can be used at a certain time. This will stop unauthorized individuals from stealing your keys and gaining access to your vehicle. You can buy a new keyfob online, but it'll still need to be cut and programmed by an authorized dealer.