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

Whether you dropped your key fob on the floor or it has stopped working, it's recommended to keep a spare key handy. This article will explain how to add, alter, and reprogramme your Mazda 3 keyfobs.

Be aware that some keys require programming from professional locksmiths, while others do not. Be sure to only make use of official Mazda replacements for your key fob.

How do you add an extra key

You can also add an additional key in case you don't have a spare key or when you accidentally damage the one you have. To accomplish this, you'll need an incredibly small screwdriver, a flathead screwdriver, and a new CR2025 battery. Once you have the items and tools, you're ready to open the key fob. First, locate the auxiliary key release button. It's located on the underside of the metal part. It's easy to find. The cover on the back should fall off as soon as you press the button. Then, insert the screwdriver's head into the notch or the space at the top of the metal component and pry it off.

Once the auxiliary key is removed, insert the new or spare key into the slot. Turn the ignition on and then wait for around 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 to your Mazda 3. The last thing you want is to have more than two functioning key fobs and not being in a position to get your car started. This is a security measure designed to prevent unauthorised users, like valet drivers, from activating your key and thereby starting your car.

How to Reprogram a spare key

If you have a spare key it's a good idea to be aware of how to reprogram it in case your original key gets stolen or lost. This will keep unauthorised persons from opening your car or taking it. This method should work on any Mazda but you'll need two keys that work to begin the reprogramming process. If you don't have two keys that work it's recommended to take your vehicle to a 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. Place the first working key into the slot, and then turn the ignition to ON. Take five seconds before removing the key. Repeat with the second key.

Once you've finished programming your new key, you should have three working keys you can use to start your car in the future. Before saving each key, be sure it's functioning correctly.

You should consider buying a spare Mazda key replacement cost Uk 3 remote, especially if your car is prone to problems. You can purchase one online or at your local auto store. Make sure to go through reviews prior to purchasing to ensure that you don't purchase a key fob which isn't compatible with your car.

How do you change the battery on a spare key

There's nothing worse than discovering that the battery on your key fob been damaged and you're unable to unlock your vehicle. It's a good thing that it's simple to replace the battery and save yourself some cash at the dealership.

Press the auxiliary button on the back of the keyfob. This will detach the key's metal cover and reveal an opening on each side of the case. Put the flathead into one of these slots and then gently pry the two halves of the case apart. When the battery is completely exposed, take it out and place it in a safe place somewhere you won't forget it.

Before you begin, make sure that you have a new replacement battery. These batteries can be purchased from any store that sells batteries or from a mazda 3 remote key dealer in Winter Garden. The right type of battery is essential to ensure that your key fob functions properly.

Replace the cap of the battery and then install the new battery. Be careful not to damage the small rubber ring that the battery is placed on. Finally press the two parts of the key fob together until you hear the sound of clicking.

How can I reset the Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It also serves as an important security feature. If you lose your key, or have it stolen the car will not start, even if you have the spare fob. The key fob needs to be reset by the dealer to allow it to work again. It can be a costly and frustrating ordeal It's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electricity in the on-board computer. Then, disconnect the LF ECU and demand switch connectors. Then, check continuity between the following terminals:

To program a new key, or a spare, place it in the slot and set the ignition to ON. The ignition should be turned off after about five seconds. The key information will now be transferred to your vehicle's computer and the new fob will be able to start your car in the future. You can program up to three fobs however, you should only use one at a time. This prevents unauthorized people from copying the key and gaining access to your car. You can purchase a replacement key fob online, however you'll still need to go to a dealer or locksmith to cut it and get it programmed.