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

It's a good idea always to have an extra key on hand, whether you dropped the keyfob you were using or it has stopped working. This article will cover everything you must be aware of when the process of adding, changing, and programming your Mazda 3 key fobs.

Certain keys require programming from a professional locksmith, while others don't. Only use official Mazda replacements to replace your key fob.

How to add a spare key

If you're not fortunate enough to get a spare key from the dealership when you purchase your mazda keys 3 or accidentally break your current one but don't worry, there's still an option to make another key. You'll need a flathead screwdriver, and a new CR2025 battery. Once you've got these items, it's time to access the key fob and swap the battery. Find the auxiliary key release. It's located on the underside of the metal portion. It's easy to locate. Once you press the button, the back cover should slide off immediately. Next, place the screwdriver's head into the notch or the space at the top of the metal component and pull it away.

After the auxiliary keys are removed, insert your 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 allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The one thing you don't want is to have more than two working key fobs but not be in a position to get your car started. This is a security measure designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and thereby starting your car.

How do I reprogram a spare key?

If you have a spare key, it's best to know how to program it if your original key is stolen or lost mazda key. This will keep unauthorised persons from starting your car, or taking it. This should work with any 2010 mazda 3 key fob. You'll need two keys that work to begin the reprogramming. If you don't have two keys that work, it's best to take your car to a dealer to have this done.

Start by getting into the driver's seat and shutting all doors, with the exception of the one that is open. Turn the ignition on and insert the initial working key. Wait for five seconds, then remove the key and repeat the process with a second working key.

After you've programmed your new key, you should have three keys that will work to start your car in the near future. Before saving each key, be sure that it's functioning properly.

It's a good idea to purchase a spare Mazda 3 key fob, especially if your car is one who has a tendency to lose their keys or has other issues with it. You can buy one online or in your local automotive store. Make sure you look up reviews before you purchase to ensure that you don't get an item that isn't compatible with your car.

How do you change the battery on a spare key?

It's depressing to find out that your key fob is dead, and you are locked out of your vehicle. It's simple to replace the battery yourself and save money at the dealership.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the key from the metal and reveal an opening on each side of the case. The flathead should be inserted into one of these slots, and then gently pry the two halves apart. Once the battery is fully exposed, remove the case and put it in a spot where you'll never forget it.

Be sure to bring a new battery ready before you begin. They are available at any retailer that sells batteries or at a Mazda dealer close to Winter Garden. Using the right type of battery will ensure that your key fob is working properly.

Replace the cap on the battery, and then insert the new battery. Be careful not damage the rubber ring on which the battery rests. The two halves should be pressed together until you can hear the click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security feature. If you lose your key or had it stolen the car will not start even if you've got the spare key fob. The key fob needs to be reprogrammed by a dealer to allow it to work again. It's a difficult and costly experience. So, it's best to learn how you can reset the system.

Remove the battery from the system for 15 minutes. This will take out any remaining electricity in the on-board computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

Insert the key into the slot and turn the ignition ON. The key should remain in the ignition for about five seconds, then switch off. The key's information is added to the computer in your car and the new fob will start your car. You can program as many fobs as want however only one should be used at a particular time. This stops unauthorized individuals from copying the key and getting ahold of your car. You can purchase a brand new keyfob from the internet, however it'll still need to be programmed and cut by an authorized dealer.