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

It's a good idea to have an extra key on hand regardless of whether you lost your keyfob, or it was unable to function. This article will explain everything you should be aware of changing, adding, and changing the programming of your Mazda 3 key fobs.

A word of warning Some keys require programming by a professional locksmith or dealer, while other keys do not. 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 if you accidentally break the one you already have. To accomplish this, you'll need a small screwdriver with a flat head and an updated CR2025 battery. Once you've got all the equipment, it is time to open the key fob. Find the key release auxiliary. It's located beneath the metal part. It's easy to find. The cover on the back should fall off as soon as 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 the spare or new key into the slot following the removal of the accessory key. Set the ignition to ON, and wait for 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 in your Mazda 3. You don't want to have to use more than two key fobs to start your vehicle. This is a safety precaution designed to stop unauthorized users, such as valet drivers who are not authorized to use your key and thereby launching your vehicle.

How to reprogram an unrepaired key

It's a good idea to learn how you can reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorized persons from taking your car and then starting it. This procedure should work with any Mazda however, you'll require two keys that work to begin the reprogramming process. If you don't have two working keys, you'll need to take your vehicle to the dealer to get it done.

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

Once you've finished programming your new key, you should have three working keys you can use to start your car in the future. Test each key to be sure that they're operating correctly before taking them off.

You should think about purchasing a spare Mazda 3 remote, especially when your car is susceptible to problems. You can find one online or at your local automobile retailer, but make sure to read reviews prior to purchasing so you can avoid getting an item that isn't compatible with your vehicle.

How do you change the battery with a spare key?

It's awful to discover that your key fob has failed and you're in a position to not unlock your vehicle. It's a good thing that it's simple to replace the battery and save some money at the dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will take out the key from the metal and reveal two slots on the opposite side of the case. Put the flathead into one of these slots and then gently push the two halves of the case apart. Once the battery is fully exposed, remove it and put it away in a place where you will not forget it.

Before you begin, be sure you have a brand new replacement battery. These batteries can be purchased from any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is essential to make sure that your keyfob functions correctly.

replace mazda key the cap on the battery and then insert the new battery. Be careful not damage the rubber ring on which the battery rests. Press the two halves together until you can hear the click.

How to Reset the system's Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It also serves as a security feature. The car won't start if the key is stolen or lost even if you have a spare key fob. The key fob needs to be reset by the dealer to make it work again. It can be a stressful and expensive ordeal. So, it's best to understand how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect the LF-ECU connector as well as the demand switch connectors. After that, test for continuity between the following terminals:

To program the new key or spare, place it in the slot and turn the ignition to ON. Turn off the ignition after approximately five seconds. The key's information will be saved to your car's computer and the new fob will be able to start your vehicle in the future. You can program up to three fobs, however, you should only use one at each time. This will stop unauthorized individuals from stealing your key and getting 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 get it programmed.