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

Whether you dropped your key fob on the floor or it simply stopped working, it's recommended to keep an extra key available. This article will tell you how to add, change or reprogramme the Mazda 3 keyfobs.

A word of caution: some keys require programming by a professional locksmith or dealer, while other keys do not. Use only official Mazda replacements to replace your key fob.

How to add a spare key

You can also add an additional key in case you don't have a spare key, or if you accidentally break the one you have. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and an updated CR2025 battery. Once you've got the tools then it's time to open the key fob. Locate the key release auxiliary. It's on the underside of the metal component and is easy to locate. Once you hit the button, the back cover should fall off right away. Then, insert the screwdriver's head into the notch, or the spacing at the top of the metal part and then pull it off.

Insert your spare key or a new one into the slot after removing the auxiliary key. Turn on the ignition and wait for approximately five seconds, and then turn it to off. This will register the new key's details to the system, allowing it to start your vehicle in the future.

You can only program three keys into your Mazda 3. You don't want to have to utilize more than two key fobs to start your car. This is a security measure to stop unauthorised users from activating your keys and then starting your car.

How to Reprogram a Spare Key

If you have a spare key, it's important to know how to program it if your original key is lost or stolen. This will stop unauthorised people from abusing your vehicle and re-starting it. This will work with any mazda 3 key replacement cost (browse around here). You'll need two keys that are functioning to begin the reprogramming. If you don't have two keys that function it's recommended to take your mazda cx 9 key fob to the dealer to have this done.

Begin by getting in your driver's seat and close the door, with the exception for the one that's been opened. Put the first working key into the slot, and then set the ignition to the ON position. For five seconds, remove the key and repeat with the second working key.

After programming your new key, you'll have 3 keys that will start your car in the near future. Check each key to make sure that they're working properly before placing them away.

It's a good idea buy a spare Mazda 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. You can purchase one online or in your local automotive store. Make sure to review the reviews before buying to ensure that you don't get a key fob which isn't compatible with your car.

How to Change the Battery on a spare Key

There's nothing worse than discovering that your key fob battery has been damaged and you're unable to unlock your vehicle. It's easy to replace the battery yourself and save 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 detach the key from the metal and reveal the slots on both sides of the case. Insert the flathead screwdriver into one of these slots, and gently pry apart the two sides of the case. When the battery is fully exposed, remove the case and put it somewhere that you will not forget it.

Be sure to bring a new battery ready prior to beginning. You can purchase them in any store that sells batteries or at a mazda key card dealer near Winter Garden. Choosing the right battery will ensure that your key fob functions perfectly.

Replace the cap of the battery and then put in the new battery. Be careful not to damage the small rubber ring that the battery rests on. The two halves should be pressed together until you hear the click.

How to reset a Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It also serves as an important security feature. If you lose your key or have it stolen the car won't start even if you've got the spare key fob. This is because the key fob needs to be reprogrammed by the dealership in order to work properly. It can be a costly and time-consuming process and it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will remove any residual electricity from the onboard computer. Next, disconnect both the LF-ECU connector as well as the demand switch connectors. Then, verify the continuity between the following terminals:

Insert the key into the slot, then switch the ignition on. The key should remain in the ignition for about five seconds and then switch it off. The key information is now transferred to the computer of your vehicle and the new fob is able to start your vehicle. You can program up to three fobs but you should only use one at a time. This will prevent unauthorized people from stealing your keys and gaining access to your vehicle. You can purchase a new key fob online, but you'll still need to visit an authorized locksmith or dealer to cut it and get it programmed.