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

Whether you dropped your key fob on the floor or it stopped working, it's best to have a spare key on hand. This article will explain how to add, change, and reprogramme your Mazda 3 keyfobs.

A word of warning Certain keys need to be programmed by a professional locksmith or dealer, whereas other keys don't. Use only official Mazda replacements to replace your key fob.

How to add a spare key

You can also add a second key if you don't have a spare key, or in the event that you break the one you already have. To accomplish this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you've got these items, it is time to open the key fob. Locate the auxiliary key release. The button is beneath the metal part. It's easy to find. The back cover should slide off when you press the button. Then, place the screwdriver's tip into the notch on top or the space and pry the metal part off.

Insert your spare key or a new one into the slot after you have removed the auxiliary key. Set the ignition to ON, and wait for mazda 3 Spare Key about five seconds before turning it to off. This will register the new key's information to the system and allow it to start your vehicle in the future.

It's important to note that you can only program up to three keys for your mazda key replacement 3. The final thing you want is to have more than two functioning key fobs and not being able to get your car started. This is a security precaution that is designed to block unauthorized users, such as valet drivers, from activating your key and starting your vehicle.

How to Reprogram a spare key

If you have a spare key it's a good idea be aware of how to reprogram it in the event that the original key you had is lost or stolen. This will prevent unauthorised persons from stealing your car and starting it. This procedure should work with any Mazda however, you'll require two working keys to begin the reprogramming. If you don't have two working keys then it's best to bring your Mazda to the dealer to have this 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. Then wait five seconds before taking out the key. Repeat with the second key.

After programming your new key you should have 3 keys that be able to start your car in the near future. Before saving each key, be sure that it's functioning properly.

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

How to Change the Battery on a spare Key

It's awful to discover that your key fob has died and you're locked out of your vehicle. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary button on the back of the keyfob. This will release the metal key that is used as an auxiliary key, and expose slots on both sides of the case. Put the flathead into one of these slots, and gently pry the two halves of the case apart. After the battery is fully exposed, take it out of the case and put it in a place where you won't forget about it.

Be sure to bring a replacement battery before you begin. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. Using the correct type of battery will ensure that your key fob works perfectly.

Replace the cap on the battery, and then install the new battery. Be careful not damage the rubber ring on which the battery rests. Then, press the two parts of the key fob until you hear a click.

How to Reset the system's Keyless Entry System

The key fob that you have in your Mazda 3 is not only an extra convenience, but also an important security feature. If you lost your key or had it stolen the car will not start even if you have the spare fob. The key fob needs to be reprogrammed by the dealer to allow it to work again. This can be a painful and costly experience. So, it's best to learn how to reset the system.

To reset the system, unplug the battery for about 15 minutes. This will clear any residual electric current from the onboard computer. Next, disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

Place the key into the slot and turn the ignition ON. Keep the key in place for about five seconds and then turn off. The key's details will be transferred to your vehicle's computer and the new fob will be able to start your car in the future. You can program as many fobs as you need, but only one should be utilized at any given time. This will prevent unauthorised people from stealing your keys and getting access to your car. You can purchase a new key fob on the internet, but you'll still need to visit an expert locksmith or dealer to get it cut and programmed.