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

If you've dropped your key fob on the ground or it simply stopped working, it's a good idea to have an extra key available. This article will teach you how to add, change or reprogramme your Mazda 3 keyfobs.

Be aware that some keys require programming from an experienced locksmith, whereas others do not. Use only authentic Mazda replacements to replace your key fob.

How to add an extra key

You can add an additional key if you don't have a spare key or if you accidentally break the one you already have. To do this, you'll need an inexpensive flathead screwdriver as well as a new CR2025 battery. Once you've got these items you can remove the key fob and swap the battery. First find the button that allows you to release the key. It's located on the underside of the metal component and is easy to find. When you hit the button, the cover should fall off right away. Then, place the screwdriver's head in the notch at the top or in the space, and remove the metal part.

Once 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 setting 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. The final thing you want is to have more than two functioning key fobs, and not be in a position to get your car started. This is a safety measure that is designed to block unauthorized users, like valet drivers who are not authorized to use your key and starting your car.

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 your original key is lost or stolen. This will keep unauthorised persons from starting your car or taking it. This process is compatible with any mazda key replacement derby however, you'll require two keys working to begin the process of reprogramming. If you don't own two working keys, you'll have to bring your car to the dealership to have it done.

Begin by getting in your driver's seat, and close the door, with the exception for the one that's already opened. Turn the ignition on and then insert the first working key. Wait five seconds, then remove the key and repeat the process with the second key.

After programming your new key you should have three keys that will allow you to start your vehicle in the future. Test each key to be sure they're working correctly before placing them away.

It's a good idea purchase an extra Mazda 3 key fob, especially if your car is one who often loses your key or has other issues with it. You can buy one online or at a local automotive store, but be 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 finding that the battery on your key fob died and you can't unlock your car. It's easy to change the battery yourself and save money at the dealer.

Press the auxiliary button on the back of the keyfob. This will release the metal key and reveal an opening on each side of the case. Press the flathead screwdriver into one of these slots and gently take apart the two halves of the case. When the battery is fully exposed, take it out of the case and 2012 Mazda 3 Key fob place it somewhere that you will not forget it.

Before you begin, be sure you have a new replacement battery. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is vital to ensure that your key fob functions properly.

Replace the battery cap and then replace the battery. Be careful not to damage the small rubber ring that the battery rests on. Then, press the two halves of the key fob together until you hear a click.

How do you reset the Keyless Entry System

The 2012 Mazda 3 Key Fob 3 key fob is not just a practical feature. It also serves as an important security feature. If you lose your key or had it stolen the car will not start even if it has the spare fob. The key fob needs to be reprogrammed by the dealer to make it work again. It can be a frustrating and costly ordeal. So, it's best to understand how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Verify that the connections are in good order between the terminals.

To program a new key or a spare, place it in the slot and set the ignition to ON. Put the key in for about five seconds and then switch it off. The key information is now transferred to the computer of your vehicle and the new fob can start your vehicle. You can program up to three fobs but you must only use one at a time. This will prevent unauthorized persons from copying your key and getting ahold of your vehicle. You can buy a new key fob online, however you'll still need to visit an authorized locksmith or dealer to cut it and programmed.