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

If you've dropped your key fob on the floor or it simply stopped working, it's always a good idea to have an extra key available. This article will show you how to add, alter or reprogramme your Mazda 3 keyfobs.

Note: Mazda 6 Key Some keys require programming by a professional locksmith, while others do not. Make sure you only use genuine mazda 3 key replacements for your key fob.

How do I add a spare key?

You can add an additional key if you don't have a spare key, or if you accidentally damage the one you have. To accomplish this, you'll need a small flathead screwdriver and a new CR2025 battery. Once you've got the tools you can remove the key fob and change the battery. Locate the key release auxiliary. It's located underneath the metal part and is easy to locate. The back cover should come off as soon as you press the button. Then, insert the screwdriver's tip into the notch on top or the space, and remove the metal part.

Insert your new or spare key into the slot following the removal of the secondary key. Set the ignition ON and wait for about five seconds, then turn it to OFF. This will register the new key's information into the system which will allow it to start your vehicle in the future.

It is important to remember that you can only program up to three keys for your Mazda 3. You don't want to use more than two keys to start your vehicle. This is a safety measure to stop anyone who is not authorized from activating your key fobs and starting your car.

How do you reprogram a spare key?

If you have a spare key, it's a good idea to be aware of how to reprogram it in the event that your original key gets stolen or lost. This will stop unauthorised people from stealing your car and starting it. This procedure should work with any Mazda however, you'll require two keys working to begin the reprogramming. If you don't have two working keys, you'll have to bring your car to the dealer to get it done.

Start by stepping into 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, take the key out and repeat with the second working key.

After you've completed programming your new key, you should have three working keys that you can use to start your car in the future. Before storing each key, make sure that it's functioning properly.

You should think about buying a spare Mazda 6 Key 3 remote, especially if your car is prone to problems. You can buy one online or at your local auto retailer, but make sure to read reviews before purchasing so that you can avoid getting an item that isn't compatible with your vehicle.

How to Change the Battery on a spare Key

There's nothing worse than finding that the battery for your key fob has been damaged and you're unable to unlock your car. Fortunately, it's easy to replace the battery and save some money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will release the metal key and reveal a slot on each side of the case. Press the flathead screwdriver into one of these slots and then gently break the two sides of the case. Once the battery has been fully exposed, take it out of the case and put it somewhere you will not forget it.

Before you start, make sure that you have a brand new replacement battery. They can be found in any store that sells batteries or at a Mazda dealer close to Winter Garden. The correct battery is vital to ensure that your keyfob is working correctly.

Replace the cap of the battery and then install the new battery. Be careful not to scratch the rubber ring that holds the battery. Press the two halves together until you hear a click.

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. The car will not start if your key is lost or stolen even if you have a spare fob. This is because the key fob has to be reset at the dealership in order to function properly. This can be a painful and costly ordeal. So, it's best to learn how to reset the system.

To reset the system, disconnect the battery for approximately 15 minutes. This will clear any residual electric current from the onboard computer. Then, disconnect both connectors for the LF-ECU and the demand switch connectors. Check for continuity between the terminals.

Put the key in the slot and switch on the ignition. Put the key in for around five seconds and then switch off. The key's details are now added to the computer in your car and the new fob is able to start your vehicle. You can program as many fobs you would like however only one must be in use at any certain time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can purchase a brand new key fob on the internet, but you'll still have to visit an expert locksmith or dealer to get it cut and programmed.