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

Whether you dropped your key fob on the ground or it just stopped working, it's always best to have a spare key on hand. This article will explain how to add, modify and re-programme your Mazda 3 keyfobs.

Warning: Some keys require programming from an expert locksmith, while others do not. Only use official Mazda replacements to replace your key fob.

How do you add a spare key

If you're unable to find a spare key from the dealer when you buy your Mazda 3 or accidentally break the one you have Don't fret, there is still a way to add another key. To accomplish this, you'll require an inexpensive flathead screwdriver as well as an updated CR2025 battery. Once you've got the tools then it's time to open up the key fob and swap the battery. First look for the auxiliary key release button. The button is on the underside the metal part. It's easy to locate. The back cover should come off as soon as you press the button. Then, you can insert the head of the screwdriver into the notch, or the spacing on the top of the metal piece and pull it off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Set the ignition ON and then wait for around five seconds before turning it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. You don't want to use more than two key fobs in order to start your car. This is a safety measure to prevent unauthorized users from activating your key fobs and starting your car.

How to reprogram an unrepaired key

It's smart to learn how you can reprogram an extra key in the event that your original key becomes lost or stolen. This will stop unauthorised people from taking your car and then starting it. This process should work on any Mazda but you'll need two working keys to begin the process of reprogramming. If you don't own two working keys it's recommended to take your Mazda to a dealer to have this completed.

Start by stepping into driver's position, and close all the doors, except the one that is open. Put the first working key into the slot, and then set the ignition cost to replace mazda key fob ON. Wait five seconds, then take the key out and 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 your car is one who often loses your key or has other issues with it. You can purchase one on the internet or at a local automotive store. Make sure to look up reviews before you purchase so that you don't get a key fob which isn't compatible with your car.

How to change the Battery on a spare Key

It's depressing to find out that your key fob is dead, and you are unable to unlock your car. It's not a problem to replace the battery and save yourself some money at the dealer.

Press the auxiliary key button located at the back of the keyfob. This will take out the metal auxiliary key and expose a slot on both sides of the case. Press the flathead into one of these slots, and then gently push the two halves apart. When the battery is completely exposed, take it out and set aside the case in a place where you will not forget it.

Before you begin, be sure that you have a new replacement battery. You can find these at any store that stocks batteries or at an Mazda dealer near Winter Garden. The correct type of battery is crucial to ensure that your key fob functions correctly.

Replace the battery cap and then put in the new battery. Be careful not to scratch the rubber ring that holds the battery. Press the two halves together until you can hear the click.

How To Open A Mazda 3 Key Fob do I reset the system's 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 had it stolen, the car will not start even if you have the spare fob. This is because the key fob needs to be reprogrammed by the dealership in order to work once more. This can be a painful and expensive ordeal. Therefore, it's best to learn how you can reset the system.

To reset the system, disconnect the battery for about 15 minutes. This will clear any residual power from the on-board computer. Then, disconnect the LF-ECU connector as well as the demand switch connectors. Verify that the connections are in good order between the terminals.

Place the key into the slot, and turn the ignition ON. Turn off the ignition after about five seconds. The key's information is added to the vehicle's computer and the new fob will start your car. You can program up to three fobs, but you should only use one at a time. This will prevent unauthorized people from stealing your key and getting access to your vehicle. You can purchase a brand new key fob online, however you'll still have to visit a dealer or locksmith to have it cut and programmed.