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

It's a good idea always to keep an extra key at hand regardless of whether you lost the keyfob you were using or it has stopped working. This article will teach you how to add, alter or reprogramme your Mazda 3 keyfobs.

A word of caution Some keys require programming by a locksmith professional or dealer, while other keys do not. Make sure you use only official Mazda replacements to replace your key fob.

How to add a spare key

You can add an additional key in case you don't have a spare key available or when you accidentally damage the one you already have. You'll need to use the flathead screwdriver, as well as an CR2025 battery. Once you've got the tools you can remove the key fob and swap the battery. First, locate the button that allows you to release the key. The button is on the underside of the metal portion. It's easy to locate. Once you press the button, the cover should slide off immediately. Next, place the head of the screwdriver into the notch or spacing at the top of the metal piece and pull it off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition to ON, and wait about five seconds before turning 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 on your Mazda 3. The final thing you want is to have more than two working key fobs, and not be in a position to get your car started. This is a safety measure to prevent unauthorized users from activating your keys and then starting your vehicle.

How to Reprogram a spare key

It's a good idea to be aware of how to reprogram an extra key in the event that the original key is lost or stolen. This will prevent unauthorised persons from stealing your car and starting it. This process should work on any Mazda however, you'll require two keys that work to begin the process of reprogramming. If you don't own two working keys, it's best to take your Mazda to a dealer to get this done.

Begin by putting yourself in the driver's seat and shutting the door, excluding for the one that's open. Place the working key in the slot, then turn the ignition to ON. Wait for five seconds, then remove the key and repeat the process with a second key.

After you've completed programming your new key, you should have three keys that you can use to start your car in the future. Test each key to be sure that they're functioning properly before throwing them away.

You should think about purchasing a spare mazda key fob 3 remote, especially when your car is susceptible to issues. You can purchase one on the internet or in your local auto store. Make sure you read reviews before purchasing so that you don't get an item that isn't compatible with your vehicle.

How do I change the battery on a spare Key

There's nothing more frustrating than discovering that the battery for your key fob has failed and you are unable to unlock your vehicle. It's easy to replace 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 auxiliary to reveal a slot on both sides of the case. Insert the flathead screwdriver into one of these slots and then gently take apart the two halves of the case. When the battery is completely exposed, remove it and place it in a safe place somewhere that you won't forget about it.

Be sure to have a replacement battery prior to starting. These batteries can be purchased from any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is essential to ensure that your key fob functions properly.

Replace the cap of the battery and then replace the battery. Be careful not to damage the rubber ring on which the battery rests. The two halves should be pressed together until you hear a click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It also serves as a security measure. If you lose your key, or have it stolen, the car will not start even if it has the spare key fob. The key fob must be reset by the dealer to enable it to function again. It can be a costly and stressful experience, so it's a good idea to learn how to reset the system yourself.

To reset the system, remove the battery for 15 minutes. This will clear any residual electric current from the onboard computer. Then, disconnect both connectors for the LF-ECU and the demand switch connectors. Verify that the connections are in good order between the terminals.

Put the key in the slot and turn the ignition ON. Turn off the ignition after about five seconds. The key's information will be transferred to your vehicle's computer and the new fob will be able to start your vehicle in the future. You can program any number of fobs you desire however only one must be utilized at any particular time. This will keep unauthorised individuals from stealing your key and gaining access to your vehicle. You can purchase a new keyfob from the internet, however it will still need to be cut and programmed by an authorized dealer.