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

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

A word of warning Some keys require programming by a locksmith professional or dealer, while others do not. Use only official Mazda replacements to replace your key fob.

How to add a spare key

You can also add an additional key if you don't have a spare key or if you accidentally damage your existing one. You'll need to use an flat-head screwdriver and an CR2025 battery. Once you have these items, it's time to access the key fob and change the battery. Locate the auxiliary key release. It's on the underside of the metal piece and is easy to find. The cover that covers the back should come off the moment you press the button. Then, put the screwdriver's head in the notch on top or the space and pull the metal piece off.

Insert your new or spare mazda key key into the slot after taking out the accessory key. Set the ignition to ON, and wait for 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 in your mazda 3 car key 3. The last thing you want is to have more than two working key fobs and not being able to get your car started. This is a security measure to stop anyone who is not authorized from activating your keys and starting your vehicle.

How do I reprogram an unrepaired key

If you have a spare key it's important to know how to program it if your original key is stolen or lost. This will keep unauthorised persons from starting your car, or taking it. This method should work on any Mazda but you'll need two working keys to begin the reprogramming process. If you don't own two keys that function, you should take your Mazda to the dealer to get this done.

Begin by stepping into the driver's seat and close all the doors, except the one that is open. Set the ignition to ON and insert the initial working key. Wait for five seconds, then remove the key and repeat with the second key.

Once you've completed programming your new key you should have 3 keys that will be able to start your vehicle in the future. Before saving each key, be sure that it's functioning properly.

You should think about purchasing an extra Mazda 3 remote, especially if your car is prone to issues. You can purchase one online or at your local auto store. Make sure to go through reviews prior to purchasing to ensure that you don't purchase the wrong key fob that isn't compatible with your vehicle.

How to change the battery using a spare mazda key key

It's depressing to find out that your key fob has died and you're unable to unlock your car. It's easy to change the battery yourself and save money 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 from the metal and reveal an opening on each side of the case. Press the flathead screwdriver into one of these slots, and gently break the two halves of the case. When the battery is completely exposed, take it out and put it away somewhere you won't forget it.

Before you begin, be sure that you have a new replacement battery. You can find these at any store that sells batteries or at an Mazda dealer near Winter Garden. The right kind of battery is crucial to ensure that your keyfob works correctly.

Next, put the new battery in the correct place and replace the cap on the battery. Be careful not to scratch the rubber ring that holds the battery. Then press the two parts of the key fob together until you hear the sound of a click.

How can I reset the Keyless Entry System

The key fob that you have in your mazda car keys 3 is not only an option for convenience, it's an important security feature. The car won't start if the key is stolen or lost, even if you've got a spare key fob. The key fob must be reprogrammed by the dealer to make it work again. It can be a frustrating and costly process. So, it's best to learn how to reset the system.

Remove the battery from the system for 15 minutes. This will erase any residual electricity from the onboard computer. Then, disconnect both the LF-ECU connector and the demand switch connectors. Check continuity between the following terminals.

Place the key in the slot and switch on the ignition. Switch off the ignition after about five minutes. The key's information will be saved to your car's computer and the new fob will be able to start your car in the future. You can program up to three fobs however, you must only use one at one time. This stops unauthorized individuals from copying your key and gaining access to your car. You can purchase a brand new keyfob online, however it'll still need to be cut and programmed by an authorized dealer.