Meet Your Fellow Mazda 6 Key Enthusiasts. Steve Jobs Of The Mazda 6 Key Industry 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 an excellent idea to keep a spare key handy. This article will explain everything you need to be aware of when adding, changing, or programming your Mazda 3 key fobs.

Warning: Some keys require programming from a professional locksmith, while others don't. Be sure to only make use of official Mazda replacements for your key fob.

How do I add a spare key?

You can also 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. You'll need to use a flathead screwdriver and a CR2025 new battery. Once you've got these tools and are ready to remove the key fob and replace the battery. Locate the auxiliary key release. It's located on the underside the metal portion. It's easy to find. When you hit the button, the cover should be removed immediately. Next, insert the screwdriver's head into the notch or spacing at the top of the metal component and then pull it off.

Once the auxiliary key has been removed, insert your new or spare key into the slot. Turn the ignition on and then wait for around five seconds, and then turn it to OFF. This will register the new information on the key to the system which will allow it to start your vehicle in the future.

It's important to know that you can only program up to three keys for your Mazda 3. The most important thing is to have more than two functioning key fobs, and not be able to get your car started. This is a safeguard to stop unauthorised users from activating your keys and starting your car.

How to Reprogram a spare key

It's smart to learn how you can reprogram a spare key in the event that the original key is lost or stolen. This will keep unauthorized people from abusing your vehicle and re-starting it. This process is compatible with any Mazda but you'll need two working keys to begin the reprogramming. If you don't have two functioning keys, you'll need bring your car to the dealer to get it done.

Start by getting into the driver's position, and close all the doors with the exception of the one that is open. Turn the ignition on and insert the first working key. After five seconds, remove the key. Repeat the process with the second key.

After you've programmed your new key, you'll have three working keys you can use to start your vehicle in the future. Before you store each key, make sure it's working properly.

It's a good idea to purchase a spare Mazda 3 key fob, especially if you're someone who often loses your key or has other issues with it. You can buy one online or at your local automobile retailer, but make sure to read reviews before buying so you aren't purchasing one that's not compatible with your car.

How do I change the battery on a spare key?

There's nothing more frustrating than finding that the battery for your key fob has failed and you are unable to unlock your vehicle. It's not a problem 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 from the metal and reveal a slot on each side of the case. Put the flathead into one of these slots, and then gently push the two halves of the case apart. Once the battery is fully exposed, remove the case and put it somewhere that you will not forget about it.

Make sure you have an additional battery before you begin. They can be found in any store that sells batteries or at an Mazda dealer close to Winter Garden. The correct battery is essential to ensure that your keyfob is working correctly.

Then, put spare mazda key in place and replace the cap on the battery. Be careful not to damage the small rubber ring the battery rests on. The two halves should be pressed together until you can hear the click.

How can I reset the Keyless Entry System


The Mazda 3 key fob is not just a piece of equipment for convenience. It also serves as a security measure. The car will not start if your key is lost or stolen even if you have a spare fob. The key fob needs to be reprogrammed by the dealer to make it work again. This can be a painful and expensive ordeal. Therefore, it's recommended to learn how you can reset the system.

To reset the system, unplug the battery for about 15 minutes. This will take out any remaining electrical power in the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Then, check continuity between the following terminals:

To program the new key or spare, insert it into the slot and set the ignition to ON. Keep the key in place for about five seconds and then switch it off. The key information is now added to the vehicle's computer and the new fob can start your car. You can program as many fobs as you need, but only one should be in use at any specific time. This will prevent unauthorized persons from copying your key and gaining access to your car. You can buy a new keyfob online, however it'll still need to be cut and programmed by a dealer.