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

It's a good idea always to keep an extra key at hand, whether you dropped the keyfob or it stopped working. This article will cover everything you need to be aware of adding, changing, and programming your Mazda 3 key fobs.

Be aware that some keys require programming by an experienced locksmith, whereas others do not. Make sure you only use genuine Mazda replacements for your key fob.

How to Add a Spare Key

You can add an additional key in case you don't have a spare key or if you accidentally damage the one you have. You'll need an flat-head screwdriver and a CR2025 new battery. Once you've got these items, it is time to open the key fob. Find the key release auxiliary. It's located on the underside of the metal piece and is easy to locate. When you press the button, the cover should fall off right away. Then, insert the head of the screwdriver into the notch, or the spacing on the top of the metal component and Nearest pull it away.

Once the auxiliary key has been removed, insert the new or spare key into the slot. Turn the ignition on and wait for five seconds, 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 for your mazda 6 key 3. You don't want to use more than two key fobs to start your car. This is a precautionary measure to stop anyone who is not authorized from activating your keys and then starting your vehicle.

How to Reprogram a Spare Key

It's a smart idea to learn how you can reprogram an extra key in the event that your original key gets lost or stolen. This will prevent unauthorized people from opening your car or taking it. This procedure should work with any Mazda however, you'll require two working keys to begin the process of reprogramming. If you don't own two keys that function, you should take your vehicle to a dealer to get this done.

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

After you finish programming your new key, you should have three keys that be able to start your car in the near future. Test each key to be sure that they're working properly before putting them away.

You should think about buying an extra Mazda 3 remote, especially when your car is susceptible to issues. You can buy one online or at your local auto store. Make sure you go through reviews prior to purchasing so that you don't get the wrong key fob that isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

It's depressing to find out that your key fob has failed and you're unable to unlock your car. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary key button at the back of the keyfob. This will detach the metal key and reveal the slots on both sides of the case. Press the flathead screwdriver into one of these slots, and gently pry apart the two halves of the case. After the battery is fully exposed, remove the case and place it somewhere you will not forget it.

Be sure to have an extra battery in place prior to beginning. You can purchase them at any store that stocks batteries or at a Mazda dealer close to Winter Garden. The correct battery is vital to ensure that your key fob functions correctly.

Then, place the new battery in its place and then replace the cap of the battery. Be careful not damage the rubber ring on which the battery rests. Finally, press the two halves of the key fob until you hear the sound of a click.

How can I reset the Keyless Entry System

The key fob inside your Mazda 3 is not only an option for convenience, it's an important security feature. If you lost your key or had it stolen, the car will not start even if you have the spare key fob. This is because the fob that you have to be reprogrammed at the dealership to work again. This can be a painful and costly ordeal. Therefore, it's advisable to learn how you can reset the system.

To reset the system, remove 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. Then, verify the continuity between the following terminals:

Put the key in the slot, then switch on the ignition. Put the key in for around five seconds, and then turn it off. The key's details are now added to the vehicle's computer and the new fob can start your vehicle. You can program as many fobs as desire, but only one should be in use at any specific time. This will prevent unauthorized people from stealing your keys and gaining access to your car. You can buy a new keyfob online, however it will still need to be programmed and cut by a dealer.