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The No. #1 Question Everybody Working In Mazda 6 Key Must Know How To Answer
How to Add, Change, and Reprogram a Mazda 3 Spare Key

If you've dropped your key fob on the floor or it has stopped working, it's an excellent idea to keep a spare key on hand. This article will provide everything you must be aware of when changing, adding, and reprogramming your Mazda 3 key fobs.

A word of caution Some keys require programming by a professional locksmith or dealer, while others do not. Only use authentic Mazda replacements to replace your key fob.

How to add a spare key

You can also add another key in the event that you don't have a spare key available or in the event that you break your current one. To accomplish this, you'll require a small screwdriver with a flat head and an updated CR2025 battery. Once you have the items you need, it's time to open the key fob. Locate the key release auxiliary. The button is located on the underside the metal portion. It's easy to find. The back cover should slide off as soon as you press the button. Next, insert thekeylab.co.uk of the screwdriver into the notch or space on the top of the metal part and pull it off.

Insert your spare or new key into the slot following the removal of the additional key. Set the ignition ON and then wait for around five seconds, and then turn it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys on your Mazda 3. The most important thing is to have more than two functioning key fobs but not be in a position to get your car started. This is a safety measure to stop unauthorized users from activating your keys and then starting your vehicle.

How do you reprogram an unrepaired key

It's a good idea to know how you can reprogram a spare key in the event that your original key becomes lost or stolen. This will stop unauthorised people from starting your car, or taking it. This process is compatible with any Mazda however you'll need two keys that work to begin the reprogramming process. If you don't have the two working keys, you'll have to take your vehicle to a dealership to get it done.


Begin by stepping into the driver's position, and shutting all doors, with the exception of 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.

Once you've completed programming your new key you should have three keys that will work to start your car in the near future. Before storing each key, make sure it's working properly.

It's a good idea buy an extra Mazda 3 key fob, especially if you're someone who often loses your key or has other issues with it. You can purchase one online or at your local auto store. Make sure you look up reviews before you purchase to ensure that you don't get the wrong key fob that isn't compatible with your car.

How to Change the Battery on a spare key

It's very frustrating to discover that your key fob has died, and you are not able to unlock your vehicle. Luckily, it's easy to replace the battery and save yourself some cash 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 and reveal two slots on the sides of the case. The flathead should be inserted into one of these slots, and then gently push the two halves apart. Once the battery has been fully exposed, take it out of the case and put it somewhere you will not forget about it.

Be sure to bring a new battery ready before you start. They can be found at any retailer that sells batteries or at a Mazda dealer near Winter Garden. Using the right type of battery will ensure that your key fob functions properly.

Replace the cap on the battery, and then install the new battery. Be careful not to damage the rubber ring that holds the battery. Finally, press the two parts of the key fob together until you hear the sound of a click.

How can I reset the Keyless Entry System

The key fob that you have in your Mazda 3 is not only a convenience, it's also an important security feature. The car won't start if the key is lost or stolen even if you have an extra key fob. The key fob should be reprogrammed by the dealer to make it work again. It can be a frustrating and costly experience. So, it's best to learn how to reset the system.

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

To program an entirely new key or spare, place it in the slot and turn the ignition to ON. Stop the ignition after approximately five seconds. The key's information is stored in the car's computer and the new fob can start your vehicle. You can program up to three fobs, however, you must only use one at each time. This will stop unauthorised people from copying the key and gaining access to your car. You can buy a new keyfob from the internet, however it must be programmed and cut by a dealer.