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

If you've dropped your key fob on the floor or it just stopped working, it's always best to have an extra key available. This article will show you how to add, alter, and reprogramme your mazda 6 key fob 3 keyfobs.

A word of caution Certain keys require programming by a locksmith professional or dealer, whereas others don't. Make sure you only use genuine Mazda replacements for your key fob.

How to Add a Spare Key

You can add a second key if you don't have a spare key, or when you accidentally damage your current one. To accomplish this, you'll require a small flathead screwdriver and an CR2025 battery that's new. Once you've got these items then it's time to remove the key fob and replace the battery. Locate the key release auxiliary. The button is located on the underside the metal portion. It's easy to locate. Once you press the button, the back cover should be removed immediately. Then, insert the head of the screwdriver into the notch or spacing on the top of the metal part and pull it off.

Insert the spare or new key into the slot after you have removed the accessory key. Set the ignition to ON and wait about five seconds before setting it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It is only possible to program three keys into 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 precautionary measure to prevent unauthorized users from activating your key fobs and starting your car.

How to Reprogram a spare key

It's smart to learn how you can reprogram an extra key in the event that the original key is lost or stolen. This will keep unauthorised persons from opening your car or stealing it. This method should work on any Mazda, though you'll need two working keys to begin the process of reprogramming. If you don't have two keys that work then it's best to bring your car to a dealer to get this completed.

Begin by stepping into the driver's position, and close all the doors, except the one that is open. Put the first working key into the slot, then set the ignition to ON. Then wait five seconds before taking out the key. Repeat the process with the second key.

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

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

How do I change the battery with a spare key?

There's nothing worse than discovering that the battery on your key fob failed and you are unable to unlock your vehicle. It's easy to replace 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 auxiliary and reveal an opening on both sides of the case. The flathead should be inserted into one of these slots, and then gently pry the two halves of the case apart. Once the battery is fully exposed, take it out and put it away somewhere you won't forget it.

Make sure you have an additional battery prior to starting. These batteries can be purchased at any store selling batteries or from a Mazda dealer in Winter Garden. Choosing the correct battery will ensure that your key fob is working properly.

Replace the cap on the battery and then install the new battery. Be careful not to scratch the small rubber ring that the battery sits on. Then, press the two parts of the key fob until you hear a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also an element of security. The car won't start if your key is lost or stolen even if you have an extra fob. The key fob must be reset by the dealer to allow it to work again. This could be a costly and time-consuming process It's a good idea to learn how to reset the system yourself.

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

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Switch off the ignition after approximately five seconds. The key's details are now transferred to the computer of your vehicle and the new fob is able to start your vehicle. You can program as many fobs as would like but only one can be used at any given time. This prevents unauthorized people from copying your key and getting ahold of your car. You can purchase a brand new keyfob online, however it still needs to be programmed and cut by an authorized dealer.