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 you were using or it stopped working. This article will cover everything you should be aware of adding, changing, and changing the programming of your Mazda 3 key fobs.

Certain keys require programming from an experienced locksmith, whereas others don't. Use only genuine 2012 mazda 3 key fob keys locked in car (read the full info here) replacements to replace your key fob.

How do I add a spare key?

You can also add a second key if you don't have a spare key or if you accidentally break your current one. You'll need to use the flathead screwdriver, as well as an CR2025 battery. Once you've got these tools then it's time to remove the key fob and change the battery. First, locate the button that allows you to release the key. It's located underneath the metal piece and is easy to find. When you press the button, the cover will fall off instantly. Then, put the screwdriver's head into the notch on top or the space, and pull the metal piece off.

Insert your spare or new key into the slot after taking out the auxiliary key. Set the ignition to ON and wait about five seconds before setting it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

You can only program three keys to your Mazda 3. You don't want to utilize more than two key fobs to start your car. This is a security precaution that is designed to block unauthorized users, like valet drivers, from activating your key and thereby launching your vehicle.

How to Reprogram a spare key

It's a good idea to know how you can reprogram an extra key in the event that your original key is lost or stolen. This will prevent unauthorised persons from getting into your car and causing damage to it. This will work with any Mazda. You will require two keys that are working to start the reprogramming process. If you don't own two working keys, you'll have to take your vehicle to a dealership to have it done.

Begin by stepping into your driver's seat, and close the door, with the exception for the one that's open. Set the ignition to ON and insert the initial working key. Wait five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you'll have three working keys you can use to start your car in the future. Test each key to be sure they're working correctly before placing them away.

You should think about buying an extra Mazda 3 remote, especially when your car is susceptible to issues. You can purchase one online or at your local automotive store, but make sure to read reviews before purchasing so that you aren't buying an item that isn't compatible with your car.

How do I change the battery on a spare key

There's nothing more frustrating than finding that the battery in your key fob has died and you can't unlock your vehicle. It's easy to change the battery yourself and save money at the dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will remove the key made of metal and reveal a slot on each side of the case. Put the flathead screwdriver in one of these slots. Then, gently break the two sides of the case. After the battery is fully exposed, remove the case and put it somewhere you will not forget it.

Before you start, make sure that you have a new replacement battery. These batteries can be purchased at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is crucial to make sure that your keyfob functions correctly.

Next, put the new battery into place and replace the cap on the battery. Be careful not to scratch the small rubber ring that the battery sits on. Then, press the two halves of the key fob until you hear an audible click.

How can I 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. If you lose your key, or have it stolen the car will not start even if it has the spare key fob. This is because the fob that you have to be reprogrammed at the dealership in order to work properly. It can be a costly and time-consuming process, so it's a good idea to learn how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Then, verify the continuity between the following terminals:

To program the new key or spare, insert it into the slot and turn the ignition to ON. Leave the key in for around five seconds, and then turn off. The key's details are now added to the computer in your car and the new fob can start your car. You can program up to three fobs but you must only use one at a time. This will stop unauthorised people from copying your key and gaining access to your vehicle. You can purchase a replacement key fob online, but you'll still need to visit an expert locksmith or dealer to cut it and get it programmed.