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How to Add, Change, and Reprogram a replacement mazda key 3 Spare Key

It's a good idea to keep a spare key on hand no matter if you've dropped your keyfob or it was unable to function. This article will cover everything you must learn about adding, changing, or programming your Mazda 3 key fobs.

Be aware that some keys require programming by professional locksmiths, while others do not. Make sure to use official Mazda replacements for your key fob.

How to Add a Spare Key

If you're not lucky enough to receive a spare keys from the dealership when you purchase your Mazda 3 or accidentally break your current key Don't fret, there's an option to get another key. To accomplish this, you'll need an inexpensive flathead screwdriver as well as a new CR2025 battery. Once you've got all the equipment you need, [empty] it's time to open the key fob. Locate the auxiliary key release. The button is on the underside of the metal portion. It's easy to locate. The back cover should slide off as soon as you press the button. Then, insert the screwdriver's tip into the notch at the top or the space, and remove the metal part.

Insert your new or spare key into the slot after removing the accessory key. Set the ignition to ON, and wait for five seconds before turning it to off. This will add the new key's information into the system and allow it to start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys for your Mazda 3. You don't want to have to use more than two key fobs to start your vehicle. This is a security precaution that is designed to block unauthorized users, like valet drivers who are not authorized to use your key and thereby launching your vehicle.

How do you reprogram a spare key?

If you have a spare key it's best to be aware of how to reprogram it in case your original key gets lost or stolen. This will stop unauthorised people from abusing your vehicle and re-starting it. This should work with any Mazda. You'll require two keys that are functioning to begin the reprogramming process. If you don't own two working keys, it's best to take your Mazda to a dealer to get this done.

Start by stepping into driver's seat and close all the doors, except the one that is open. Turn the ignition on and insert the first functioning key. Then wait five seconds before taking out the key. Repeat with the second key.

Once you've programmed your new key, you should have three working keys you can use to start your car in the future. Test each key to ensure sure that they're operating correctly before placing them away.

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can buy one online or at your local auto store, but be sure to read the reviews before buying so that you aren't purchasing the wrong key fob compatible with your car.

How do you change the battery using a spare key

There's nothing more frustrating than discovering that the battery on your key fob failed and you are unable to unlock your vehicle. It's easy to change the battery yourself and save money at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will remove the metal key and reveal two slots on the opposite side of the case. The flathead should be inserted into one of these slots, and then gently pull the two halves apart. When the battery is completely exposed, remove it and place the case somewhere that you won't forget about it.

Make sure you have an additional battery before you start. They are available at any store that stocks batteries or at an Mazda dealer close to Winter Garden. The right kind of battery is vital to ensure that your keyfob is working correctly.

Then, place the new battery in its place and then replace mazda key the cap on the battery. Be careful not damage the rubber ring on which the battery rests. Then press the two halves of the key fob together until you hear the sound of clicking.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security feature. If you lost your key or had it stolen, the car will not start even if you've got the spare fob. This is because the fob that you have to be reset at the dealership in order to work again. This could be a costly and frustrating ordeal and it's a good idea to know how to reset the system yourself.

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

To program the new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds, [empty] then switch it off. The key information is now added to the computer in your car and the new fob will start your car. You can program up to three fobs, but you must only use one at each time. This will prevent unauthorized people from stealing your keys and gaining access to your car. You can buy a new keyfob online, however it will still need to be cut and programmed by a dealer.