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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 stopped working, it's a good idea to have a spare key handy. This article will provide everything you must be aware of changing, adding, and reprogramming your Mazda 3 key fobs.

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

How to add a spare key

If you're unable to receive a spare keys from the dealer when you buy your Mazda 3 or accidentally break your current key Don't fret, there is still an option to get another key. You'll need to use a flathead screwdriver, and the CR2025 replacement battery. Once you have the items then it's time to open the key fob. Find the key release auxiliary. It's located on the bottom of the metal portion. It's easy to find. The cover on the back should fall off when you press the button. Then, you can insert the screwdriver's head into the notch or space on the top of the metal piece and then pull it off.

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

You can only program three keys to your Mazda 3. The most important thing is to have more than two working key fobs and not being in a position to get your car started. This is a safety measure designed to prevent unauthorized users, such as valet drivers, from activating your key and thereby launching your vehicle.

How do you reprogram a spare key?

If mazda key replacement derby have a spare key it's important to know how to program it if your original key gets stolen or lost. This will keep unauthorized people from abusing your vehicle and re-starting it. This procedure should work with any Mazda however you'll need two keys working to begin the process of reprogramming. If you don't own two keys that function, it's best to take your Mazda to a dealer to get this done.

Begin by getting into your driver's seat, and close the door, with the exception for the one that's already opened. Put the first working key in the slot, and then turn the ignition to the ON position. For five seconds, remove the key and repeat the process with the second key.

After you've completed programming your new key, you'll have three keys that you can use to start your vehicle in the future. Check each key to make sure that they're operating correctly before taking them off.

It's a good idea to purchase a spare Mazda 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can buy one online or in your local automotive store. Make sure to go through reviews prior to purchasing so that you don't get the wrong key fob that isn't compatible with your vehicle.

How do you change the battery on a spare key

There's nothing more frustrating than finding that your key fob battery has died and you can't 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 at the back of the keyfob. This will remove the key from the metal and reveal an opening on each side of the case. Insert the flathead screwdriver into one of these slots, and gently remove the two sides of the case. Once the battery is fully exposed, remove it and set aside the case in a place where you will not forget it.

Make sure you have a new battery ready before you begin. You can purchase them at any store that sells batteries or at an Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob functions properly.

Then, place the new battery in its place and then replace the cap of the battery. Be careful not to scratch the small rubber ring the battery sits on. Then, press the two halves of the key fob until you hear the sound of clicking.

How do you reset the Keyless Entry System


The key fob that you have in your Mazda 3 is not only an extra convenience, but also an important security feature. If you lost your key or had it stolen, the car will not start even if you have the spare fob. This is because the fob that you have to be reprogrammed by the dealership to work once more. It can be a frustrating and costly ordeal. So, it's best to learn how to reset the system.

To reset the system, remove the battery for about 15 minutes. This will eliminate any remaining electric current from the onboard computer. The next step is to disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. Switch off the ignition after approximately five minutes. The key's information has been stored in the car's computer and the new fob can start your vehicle. You can program as many fobs as you want but only one can be used at a particular time. This will stop unauthorised people from copying the key and getting ahold of your car. You can purchase a replacement key fob online, however you'll still need to go to a locksmith or dealer in order to have it cut and programmed.

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Pub: 18 Apr 2024 19:40 UTC
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