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How to Add, Change, and Reprogram a Mazda 3 Spare Key
If you've dropped your key fob on the floor or it just stopped working, it's best to have an extra key available. This article will go over everything you should know about changing, adding, and changing the programming of your Mazda 3 key fobs.
Certain keys require programming by professional locksmiths, while others do not. Be sure to only use genuine Mazda replacements for your key fob.
How do I add an additional key
You can add an additional key in case you don't have a spare key, or when you accidentally damage the one you have. You'll need the flathead screwdriver, as well as a CR2025 new battery. Once you've got all the equipment then it's time to open the key fob. First, locate the button that allows you to release the key. It's located under the metal piece and is easy to locate. The back cover should slide off when you press the button. Then, you can insert the screwdriver's tip into the notch at the top or the space, and take the metal part away.
After the auxiliary key has been removed, insert the new or spare key into the slot. Turn on the ignition and wait for approximately five seconds, then turn it to OFF. This will add the new information on the key to the system which will allow it to start your vehicle in the future.
It's important to note that you can only program up to three keys on your Mazda 3. The last thing you want is to have more than two working key fobs, and not be capable of getting your vehicle started. This is a safety measure that is designed to block unauthorized users, such as valet drivers from activating your key and starting your vehicle.
How do you reprogram an unrepaired key
It's a smart idea know how to reprogram a spare key in the event that the original key is lost or stolen. This will prevent unauthorized people from starting your vehicle or stealing it. This will work with any Mazda. You'll need two keys that work to start the reprogramming process. If you don't have two working keys, you'll need bring your car to the dealer to get it done.
Begin by putting yourself in the driver's seat, and close the door, except for the one that's open. Turn the ignition on and insert the first working key. Wait for five seconds, then take the key out and repeat with the second working key.
After you've programmed your new key, you'll have three keys that start your vehicle in the future. Before placing each key in storage, make sure that it's functioning properly.
You should think about buying a spare Mazda 3 remote, especially in cases where your car is prone to issues. You can buy one online or in your local auto store. Be sure to go through reviews prior to purchasing so that you don't get a key fob which isn't compatible with your vehicle.
How to change the Battery on a spare key
There's nothing worse than finding that your key fob battery has been damaged and you're unable to unlock your car. It's simple to replace the battery yourself and save money at the dealership.
Press the auxiliary key button located at the back of the keyfob. This will release the metal key and reveal a slot on each side of the case. Press the flathead into one of these slots, and then gently pry the two halves of the case apart. When 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 before you start. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is vital to make sure that your keyfob functions properly.
Then, place the new battery into place and replace the cap on the battery. Be careful not to scratch the rubber ring that holds the battery. Finally, press the two parts of the key fob together until you hear the sound of clicking.
How do I reset a Keyless Entry System
The Mazda 3 key fob is not just a convenience. It also serves as a security measure. The car won't start if your key is lost or stolen even if you have a spare fob. The key fob needs to be reprogrammed by a dealer to enable it to function again. It can be a costly and frustrating ordeal, so it's a good idea to learn how to reset the system yourself.
To reset the system, unplug the battery for 15 minutes. This will remove any remaining electricity from the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Verify G28CarKeys between the next terminals.
Insert the key into the slot, and turn the ignition ON. The key should remain in the ignition for about five seconds and then switch off. The key information will now be transferred to your vehicle's computer, and the new fob will be able start your vehicle in the future. You can program up to three fobs, but you should only use one at a time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can purchase a replacement keyfob from the internet, however it'll still need to be programmed and cut by a dealer.
