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

If you've dropped your key fob on the ground or it just stopped working, it's recommended to keep an extra key in your pocket. This article will tell you how to add, change, and reprogramme your Mazda 3 keyfobs.

A word of warning: some keys require programming by a locksmith professional or dealer, whereas other keys don't. Make sure to use genuine mazda 2 key replacement replacements for your key fob.

How do I add a spare key?

If you're unable to receive a spare keys from the dealership when you buy your mazda key replacement 3 or accidentally break your current one Don't fret, there's an option to get another key. To do this, you'll need a small flathead screwdriver and an updated CR2025 battery. Once you've got all the equipment you need, it's time to open the key fob. Find the auxiliary key release. It's located underneath the metal portion and is easy to locate. When you press the button, the back cover will fall off instantly. Then, put the screwdriver's head in the notch on top or the space, and remove the metal part.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition to ON and wait for about five seconds before turning it to off. This will add the new information on the key to the system that will allow it to start your car in the future.

It's important to keep in mind 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, such as valet drivers, from activating your key and starting your car.

How to Reprogram a Spare Key

It's a smart idea to know how you can reprogram an extra key in the event that the original key is lost or stolen. This will prevent unauthorized people from starting your car or stealing it. This method should work on any Mazda however, you'll require two keys working to begin the reprogramming. If you don't own two working keys, it's best to take your vehicle to a dealer to have this completed.

Begin by getting into your driver's seat and closing the door, except for the one that's open. Insert the first working key in the slot, and then set the ignition to the ON position. For five seconds, remove the key and repeat the process with the second working key.

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

It's a good idea to buy a spare Mazda 3 key fob, especially if you're a driver who often loses your key or has other issues with it. You can find one online or at your local auto store, but make sure to read reviews before buying so you aren't purchasing the wrong key fob compatible with your car.

How to change the Battery on a spare Key

There's nothing more frustrating than finding that your key fob battery has gone out and you're not able to unlock your car. Fortunately, it's easy to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary key button that is located on the back of the key fob. This will release the key made of metal and reveal a slot on each side of the case. Use the screwdriver's flathead to push it into one of these slots. Then, gently pry apart the two halves of the case. When the battery is fully exposed, remove the case and place it somewhere that you will not forget about it.

Before you begin, be sure that you have a new replacement battery. They can be bought at any store selling batteries or from a Mazda dealer in Winter Garden. The right kind of battery is essential to ensure that your keyfob is working correctly.

Then, place the new battery in the correct place and replace the battery cap. Be careful not to damage the rubber ring that holds the battery. Press the two halves together until you hear the click.

How to reset a 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 had it stolen the car won't start even if you've got the spare fob. This is because the fob that you have to be reprogrammed at the dealership in order to work again. This can be an expensive and time-consuming process It's a good idea to learn how to reset the system yourself.

To reset the system, unplug the battery for about 15 minutes. This will eliminate any remaining electrical power in the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Then, verify the continuity between the following terminals:

Place the key into the slot and turn on the ignition. Put the key in for about five seconds, then switch off. The key's information has been added to the computer in your car and the new fob is able to start your vehicle. You can program as many fobs you want but only one can be utilized at any given time. This will prevent unauthorised people from stealing your keys and gaining access to your car. You can purchase a brand new key fob online, but you'll still have to visit an expert locksmith or dealer to cut it and programmed.