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

It's a good idea always to keep a spare key on hand, whether you dropped the keyfob or it stopped working. This article will tell you how to add, change or reprogramme the mazda 6 key fob 3 keyfobs.

Warning: Some keys require programming by a professional locksmith, while others do not. Make sure you only make use of official Mazda replacements for your key fob.

How do I add an extra key

You can add an additional key in case you don't have a spare key or in the event that you break the one you already have. To accomplish this, you'll need a small screwdriver with a flat head and an updated CR2025 battery. Once you've got the tools you can open the key fob and replace the battery. First find the key release button for the auxiliary key. The button is on the underside of the metal part. It's easy to locate. Once you press the button, the cover should be removed immediately. Then, insert the head of the screwdriver into the notch or the space at the top of the metal piece and then pull it off.

Insert the spare or new key into the slot after you have removed the additional key. Turn the ignition on and then wait for around five seconds, then set it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It is only possible to program three keys to your Mazda 3. You don't want to utilize more than two key fobs to start your vehicle. This is a precautionary measure to stop anyone who is not authorized from activating your keys and starting your vehicle.

How to Reprogram a Spare Key

It's smart to learn how you can reprogram a spare key in the event that your original key gets lost or stolen. This will prevent unauthorised persons from getting into your car and causing damage to it. This method should work on any Mazda but you'll need two keys that work to begin the process of reprogramming. If you don't have two working keys, you'll need bring your car to the dealership to have it done.

Begin by getting in your driver's seat, and shutting the door, excluding for the one that's already opened. Insert the first working key in the slot, and then turn the ignition to the ON position. Wait for five seconds, then remove the key and repeat the process with a second key.

After programming your new key you should have 3 keys that allow you to start your vehicle in the future. Test each key to be sure they're working correctly before taking them off.

It's a good idea buy an extra Mazda Key Fob Programming 3 key fob, particularly if you're a driver who often loses your key or has other issues with it. You can find one online or at your local auto retailer, but make sure to read the reviews before purchasing so that you can avoid purchasing a key fob that's not compatible with your vehicle.

How to change the battery with a spare key?

It's very frustrating to discover that your key fob is dead and you're in a position to not unlock your vehicle. Fortunately, it's easy to replace the battery and save yourself some cash at the dealership.

Press the auxiliary key button at the back of the keyfob. This will take out the key's metal cover and reveal an opening on each side of the case. Press the flathead screwdriver into one of these slots and gently remove the two sides of the case. When the battery is 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. These batteries can be purchased from any store that sells batteries or from a Mazda dealer in Winter Garden. Using the right type of battery will ensure that your key fob is working perfectly.

Replace the cap of the battery and then install the new battery. Be careful not to scratch the small rubber ring the battery rests on. Then press the two halves of the key fob together until you hear the sound of clicking.

How to Reset the system's Keyless Entry System

The key fob on your Mazda 3 is not only a convenience, it's also an important security feature. The car will not start if your key is stolen or lost, even if you've got a spare key fob. The key fob has to be reset by the dealer to allow it to work again. This can be an expensive and frustrating ordeal, so it's a good idea to learn how to reset the system yourself.

To reset the system, disconnect the battery for about 15 minutes. This will eliminate any residual electricity from the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Verify the continuity between the next terminals.

Place the key in the slot and switch the ignition on. Stop the ignition after about five minutes. The key information will now be added to the vehicle's computer, and the new fob will be able start your vehicle in the future. You can program up to three fobs, however, you must only use one at each time. This prevents unauthorized people from copying the key and gaining access to your vehicle. You can purchase a new key fob online, but you'll still need to go to a dealer or locksmith to cut it and get it programmed.