What NOT To Do In The Mazda 6 Key Industry How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the floor or it has stopped working, it's always an excellent idea to keep a spare key handy. This article will cover everything you should learn about adding, changing, and programming your Mazda 3 key fobs.

A word of caution Certain keys need to be programmed by a locksmith professional or dealer, while others do not. Make sure you only use official Mazda replacements for your key fob.

How to add a spare key

If you're not lucky enough to receive a spare keys from the dealership when you buy your Mazda 3 or accidentally break the one you have but don't worry, there's still the option of adding another key. To do this, you'll need an inexpensive flathead screwdriver as well as an CR2025 battery that's new. Once you have these items, it's time to open up the key fob and change the battery. First, locate the key release button for the auxiliary key. It's located on the underside of the metal part. It's easy to locate. The cover on the back should fall off as soon as you press the button. Then, you can insert the screwdriver head into the notch on top or the space and pull the metal piece off.

Insert mazda 3 car key replacement or spare key into the slot following the removal of the secondary key. Turn the ignition on and wait for approximately five seconds, then set it to off. This will allow the system to recognize the new key and begin 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 to start your vehicle. This is a safety measure that is designed to block 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 important to know how to reprogram it in case your original key gets stolen or lost. This will stop unauthorised people from abusing your vehicle and re-starting it. This will work with any Mazda. You'll need two keys that work to begin the reprogramming. If you don't have the two working keys, you'll have to bring your vehicle to the dealership to get it done.

Start by getting into the driver's position, and shutting all doors, with the exception of the one that is open. Put the first working key in the slot, then turn the ignition to ON. Wait for five seconds, then take the key out and repeat the process with the second key.

Once you've completed programming your new key, you should have 3 keys that be able to start your vehicle in the future. Before storing each key, make sure that it's working correctly.

It's a good idea purchase a spare Mazda 3 key fob, especially if you're a driver who has a tendency to lose their keys or has other issues with it. You can purchase one online or in your local automotive store. Make sure to go through reviews prior to purchasing to ensure you don't buy an item that isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

There's nothing worse than finding that your key fob battery has gone out and you're not able to unlock your car. It's a good thing that it's simple to replace the battery and save some money at the dealer.

Press the auxiliary button on the back of the keyfob. This will release the metal key that is used as an auxiliary key, and expose an opening on both sides of the case. Press the flathead into one of these slots and gently pry the two halves apart. After the battery is fully exposed, take it out of the case and put it somewhere you will not forget it.

Be sure to have an extra battery in place before you start. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. Using the correct type of battery will ensure that your key fob works properly.

Replace the battery cap and then replace the battery. Be careful not to scratch the rubber ring on which the battery rests. Then press the two halves of the key fob together until you hear the sound of clicking.

How do I reset the system's Keyless Entry System

The key fob inside your Mazda 3 is not only an added convenience, but it's also an important security feature. The car won't start if the key is stolen or lost even if you have an extra key fob. This is because the key fob has to be reprogrammed at the dealership to work again. It can be a stressful and costly process. Therefore, it's advisable to learn how you can reset the system.

To reset the system, remove the battery for about 15 minutes. This will remove any residual electricity from the onboard computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Then, verify the continuity between the following terminals:

Place the key into the slot, then switch the ignition on. Switch off the ignition after about five seconds. The key's information has been added to the computer in your car and the new fob is able to start your car. You can program up to three fobs but you should 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 key fob online, but you'll still need to go to an authorized locksmith or dealer to have it cut and programmed.