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

It's a good idea always to have an extra key on hand no matter if you've dropped your keyfob, or it stopped working. This article will explain how to add, alter or reprogramme the Mazda 3 keyfobs.

A word of caution Certain keys require programming by a locksmith professional or dealer, while others don't. Make sure you only use genuine Mazda replacements for your key fob.

How to add a spare key

If you're not fortunate enough to receive a spare key from the dealership when you purchase your Mazda 3 or accidentally break your current one but don't worry, there's a way to add another key. To do this, you'll need an inexpensive flathead screwdriver as well as an updated CR2025 battery. Once you've got these items then it's time to access the key fob and replace the battery. Find the auxiliary key release. It's located beneath the metal part. It's easy to find. The back cover should come off as soon as you press the button. Then, you can insert the screwdriver's head into the notch, or the spacing on the top of the metal component and pull it off.

Insert your new or spare key into the slot after you have removed the additional key. Set the ignition to ON and wait for five seconds before turning it to off. This will allow the system to recognize the new key and start your vehicle in the future.

You can only program three keys on 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 unauthorized users from activating your key fobs and starting your car.

How to Reprogram a spare key

If you have a spare key, it's a good idea know how to program it in the event your original key gets stolen or lost. This will stop unauthorised people from starting your car or taking it. This process should work on any Mazda however, you'll require two working keys to start the reprogramming. If you don't have two functioning keys, you'll need to bring your car to the dealership to have it done.

Begin by putting yourself in the driver's seat, and close the door, except for the one that's been opened. Insert the first working key in the slot, and then turn the ignition to the ON position. After five seconds, remove the key. Repeat with the second key.

Once you've finished programming your new key, you should have three keys that you can use to start your car in the future. Before placing each key in storage, make sure that it's functioning properly.

You should think about buying a spare mazda 2 key fob replacement 3 remote, especially in the event that your vehicle is prone to issues. You can buy one online or in your local automotive store. Be sure to read reviews before purchasing to ensure that you don't purchase an item that isn't compatible with your vehicle.

How to change the battery on a spare key?

There's nothing more frustrating than discovering that the battery on your key fob 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 key button that is located on the back of the key fob. This will release the metal auxiliary key and expose slots on both sides of the case. Put the flathead screwdriver in one of these slots and gently pry apart the two sides of the case. Once the battery is fully exposed, remove the case and place it in a place where you won't forget it.

Be sure to have a replacement battery prior to beginning. They can be bought from any store that sells batteries or from a Mazda dealer in Winter Garden. The right type of battery is essential to ensure that your keyfob works correctly.

Replace the battery cap and then insert the new battery. Be careful not to scratch the small rubber ring that the battery rests on. Then, press the two parts of the key fob until you hear the sound of a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security measure. If you lose your key, or Mazda 3 spare Key have 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 reset at the dealership in order to work once more. This can be a painful and costly ordeal. Therefore, it's recommended to learn how you can reset the system.

Remove the battery from the system for 15 minutes. This will take out any remaining electrical current from the computer on board. Then, disconnect the LF -ECU and demand switch connectors. Verify the continuity between the next terminals.

Put the key in the slot and turn on the ignition. Keep the key in place for mazda 3 spare key about five seconds, then turn off. The key information will now be added to your vehicle's computer and the new fob will be able start your vehicle in the future. You can program as many fobs you need, but only one should be used at any specific time. This will stop unauthorised people from copying your key and gaining access to your vehicle. You can purchase a new key fob online, however you'll still have to visit a dealer or locksmith to have it cut and programmed.