Mazda 6 Key 10 Things I'd Like To Have Learned Sooner How to Add, Change, and Reprogram a Mazda 3 Spare Key

If you've dropped your key fob on the ground or it stopped working, it's a good idea to have a spare key handy. This article will provide everything you need to be aware of when changing, adding, and reprogramming your Mazda 3 key fobs.

Note: Some keys require programming from a professional locksmith, while others don't. Only use authentic Mazda replacements to replace your key fob.

How do I add a spare key?

If you're not fortunate enough to find a spare key from the dealership when you buy your Mazda 3 or accidentally break your current key do not fret -- there is still an option to get another key. To accomplish this, you'll require a small flathead screwdriver and an updated CR2025 battery. Once you've got all the equipment and tools, you're ready to open the key fob. First, locate the button that allows you to release the key. It's located underneath the metal component and is easy to locate. The back cover should slide off the moment you press the button. Then, place the screwdriver's head in the notch at the top or the space and take the metal part away.


Once the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON, and wait for around five seconds before turning it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The last thing you want is to have more than two working key fobs, and not be able to get your car started. This is a security precaution designed to stop unauthorized users, such as valet drivers who are not authorized to use your key and starting your vehicle.

How to Reprogram mazda 5 key fob

If you have a spare key, it's best to be aware of how to reprogram it in the event that your original key gets lost or stolen. This will stop unauthorised people from stealing your car and starting it. This will work with any Mazda. You will need two keys that are functioning to begin the reprogramming process. If you don't own two keys that function, it's best to take your Mazda to the dealer to have this completed.

Begin by stepping into your driver's seat, and close the door, with the exception for the one that's opened. Set the ignition to ON and insert the initial working key. For five seconds, take the key out and repeat the procedure with the second key.

After you finish programming your new key you should have 3 keys that allow you to start your vehicle in the future. Before storing each key, make sure it's working properly.

You should think about buying an extra Mazda 3 remote, especially in cases where your car is prone to problems. You can purchase one online or in your local automotive store. Be sure to go through reviews prior to purchasing to ensure you don't buy the wrong key fob that isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

There's nothing more frustrating than discovering that your key fob battery has died and you can't unlock your vehicle. Fortunately, it's easy to replace the battery and save some money at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will detach the key from the metal and reveal an opening on each side of the case. Place the flathead in one of these slots, and then gently push the two halves apart. When the battery is fully exposed, take it out of the case and place it in a spot where you'll never forget it.

Before you begin, be sure that you have a new replacement battery. They are available at any retailer that sells batteries or at an Mazda dealer near Winter Garden. Choosing the right battery will ensure that your key fob operates correctly.

Next, put the new battery in its place and then replace the cap of the battery. Be careful not to scratch the small rubber ring that the battery is placed on. Press the two halves together until you 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's also an important security feature. The car won't start if your key is stolen or lost, even if you've got an extra key fob. This is because the key fob has to be reset at the dealership in order to function properly. It can be a frustrating and costly experience. So, it's best to learn how you can reset the system.

To reset the system, remove the battery for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the following terminals:

Put the key in the slot, and turn the ignition ON. Stop the ignition after about five minutes. The key's information is stored in the car's computer and the new fob can start your car. You can program up to three fobs, however, you should only use one at a time. This will prevent unauthorised people from stealing your keys and getting access to your vehicle. You can purchase a brand new key fob online, but you'll still need to go to a dealer or locksmith to cut it and programmed.