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

If you've dropped your key fob on the floor or it simply stopped working, it's a good idea to have a spare key handy. This article will tell you how to add, change or reprogramme your Mazda 3 keyfobs.

A word of warning Certain keys require programming by a locksmith professional or dealer, whereas others do not. Be sure to only make use of official Mazda replacements for your key fob.

How to add a spare key

If you're not lucky enough to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one Don't fret, there's an option to get another key. You'll need an flat-head screwdriver and an CR2025 battery. Once you have these items then it's time to open up the key fob and change the battery. First find the key release button for the auxiliary key. It's located on the underside of the metal piece and is easy to find. The cover that covers the back should come off as soon as you press the button. Then, you can insert the screwdriver's head in the notch on top or the space and remove the metal part.

After the auxiliary key has been removed, insert your new mazda car key or spare key into the slot. Set the ignition to ON, and wait for about five seconds before setting it to OFF. This will register the new key's information into the system, allowing it to start your car in the future.

It's important to keep in mind that you can only program up to three keys for your Mazda 3. The one thing you don't want is to have more than two functioning key fobs and not being able to get your car started. This is a safety measure designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and thereby starting your car.

How do I reprogram a spare key

If you have a spare key it's best to know how to program it in the event the original key you had is lost or stolen. This will stop unauthorised people from stealing your car and starting it. This process should work on any mazda 3 key fob programming however, you'll require two keys that work to begin the process of reprogramming. If you don't have the two working keys, you'll have to bring your car to the dealership to get it done.

Begin by getting in your driver's seat, and close the door, with the exception for the one that's been opened. Insert the first working key in the slot, then turn the ignition to the ON position. Wait five seconds, then take the key out and repeat the procedure with the second key.

After you've programmed your new key, you should have three keys that you can use to start your car in the future. Before placing each key in storage, make sure that it's functioning properly.

It's a good idea to purchase a spare mazda replacement key 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. You can buy one online or at your local automotive retailer, but make sure to read the reviews prior to purchasing so you can avoid getting a key fob that's not compatible with your car.

How to change the Battery on a spare key

There's nothing more frustrating than discovering that your key fob battery has died and you can't unlock your car. Luckily, it's easy to replace the battery and save yourself some money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the key made of metal and reveal an opening on each side of the case. Place the flathead in one of these slots, and then gently pry the two halves of the case apart. Once the battery is fully exposed, take it out of the case and put it in a place where you won't forget it.

Be sure to have an additional battery prior to starting. These batteries can be purchased at any store that sells batteries or from a mazda 6 key fob dealer in Winter Garden. The right type of battery is essential to make sure that your keyfob functions correctly.

Then, place the new battery into place and replace the cap on the battery. Be careful not to scratch the small rubber ring that the battery sits on. Finally press the two parts of the key fob together until you hear the sound of a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a convenience. It also serves as an element of security. If you lose your key or have it stolen, the car will not start even if you've got the spare key fob. The key fob has to be reprogrammed by a dealer to allow it 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, unplug the battery for approximately 15 minutes. This will take out any remaining electricity from the onboard computer. Then, disconnect the LF -ECU and demand switch connectors. Then, verify the continuity between the following terminals:

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Put the key in for around five seconds, and then turn off. The key's details 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 any number of fobs you would like but only one can be used at any specific time. This will stop unauthorised people from copying the key and getting ahold of your car. You can purchase a new key fob online, but you'll still have to visit an authorized locksmith or dealer to cut it and get it programmed.