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

Whether you dropped your key fob on the ground or it stopped working, it's always best to have a spare key on hand. This article will explain everything you must learn about the process of adding, changing, and changing the programming of your mazda key card 3 key fobs.

Certain keys require programming from an expert locksmith, while others don't. Make sure you use only official 2010 mazda 3 key fob replacements to replace your key fob.

How do you add an additional key

If you're unable to get a spare mazda key key from the dealer when you purchase your Mazda 3 or accidentally break your current one, don't worry -- there is still an option to make another key. You'll need to use a flathead screwdriver, and an CR2025 battery. Once you've got these items and tools, you're ready to open the key fob. Locate the auxiliary key release. It's located on the bottom of the metal part. It's easy to locate. Once you press the button, the back cover will fall off instantly. Then, place the screwdriver's head in the notch on top or in the space, and pull the metal piece off.

Insert your new or spare key into the slot following the removal of the additional key. Set the ignition to ON and wait for around five seconds before turning it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

You can only program three keys into your Mazda 3. You don't want to use more than two keys to start your car. This is a security measure designed to prevent unauthorized users, such as valet drivers from activating your key and thereby starting your car.

How to reprogram a spare key

If you have a spare key, it's best to know how to program it in the event the original key you had is stolen or lost. This will prevent unauthorised persons from abusing your vehicle and re-starting it. This should work with any Mazda. You'll require two keys that work for the reprogramming to begin. If you don't have two keys that work, you should take your Mazda to the dealer to get this completed.

Start by getting into the driver's seat and close all the doors, except the one that is open. Insert the first working key in the slot, then set the ignition to the ON position. Wait five seconds, then remove the key and repeat the process with a second working key.

Once you've completed programming your new key you should have 3 keys that be able to start your car in the near future. Check each key to make sure they're working correctly before throwing them away.

It's a good idea to purchase an extra Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can purchase one online or in your local automotive store. Make sure to look up reviews before you purchase to ensure that you don't purchase 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 the battery for your key fob has failed and you are unable to unlock your car. Fortunately, it's easy to replace the battery and save yourself 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 remove the key made of metal and reveal two slots on the opposite side of the case. Use the screwdriver's flathead to push it into one of these slots and gently take apart the two parts of the case. After the battery is fully exposed, remove the case and put it in a place where you won't forget about it.

Be sure to have a new battery ready prior to beginning. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. Using the right type of battery will ensure that your key fob operates effectively.

Next, put the replacement battery in place and replace the cap of the battery. Be careful not to scratch the small rubber ring that the battery sits on. Finally, press the two halves of the key fob until you hear the sound of a click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also a security measure. If you lost your key or had it stolen the car will not start even if you have the spare key fob. This is because the fob that you have to be reprogrammed at the dealership to work once more. It can be a costly and frustrating ordeal and it's a good idea to know how to reset the system yourself.

To reset the system, remove the battery for 15 minutes. This will erase any residual electrical power in the on-board computer. Next, disconnect both the LF-ECU connector and the demand switch connectors. Check for continuity between the terminals.

Put the key in the slot, and switch on the ignition. The ignition should be turned off after approximately five seconds. The key's information is added to the vehicle's computer and the new fob is able to start your car. You can program up to three fobs but you should only use one at a time. This stops unauthorized individuals from copying your key and gaining access to your vehicle. You can purchase a new key fob online, however you'll still have to visit a dealer or locksmith to have it cut and programmed.