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

If you've dropped your key fob on the ground or it stopped working, it's always best to have a spare key handy. This article will go over everything you must know about adding, changing, or reprogramming your mazda keyless entry 3 key fobs.

Certain keys require programming by professional locksmiths, while others do not. Make sure you only use official 2012 mazda 3 key fob replacements for your key fob.

How to Add a Spare Key

If you're unable to receive a spare keys from the dealership when you purchase your mazda 2 keys 3 or accidentally break your current one, don't worry -- there's still a way to add another key. You'll need the flathead screwdriver, as well as the CR2025 replacement battery. Once you've got the tools and are ready to access the key fob and replace the battery. First, locate the key release button for the auxiliary key. It's located underneath the metal piece and is easy to locate. When you press the button, the cover should slide off immediately. Then, put the screwdriver's tip into the notch at the top or the space, and pull the metal piece off.

Insert your new or spare key into the slot after you have removed the accessory key. Set the ignition ON and wait for five seconds, and then turn it to off. This will register the new key's details to the system and allow it to start your vehicle in the future.

It's important to note that you can only program up to three keys for your Mazda 3. The most important thing is to have more than two functioning key fobs and not be in a position to get your vehicle started. This is a safeguard to stop anyone who is not authorized from activating your keys and starting your car.

How to Reprogram a spare key

It's a smart idea be aware of how to reprogram a spare key in the event that the original key is lost or stolen. This will stop unauthorized persons from opening your car or stealing it. This procedure should work with any mazda 6 key fob programming but you'll need two working keys to begin the process of reprogramming. If you don't own two keys that function then it's best to bring your Mazda to the dealer to get this completed.

Start by stepping into driver's seat and close all the doors, except the one that is open. Insert the first working key into the slot, and then set the ignition to ON. After five seconds, take the key out and repeat the process with the second key.

After you've completed programming your new key, you'll have three working keys you can use to start your vehicle in the future. Test each key to be sure that they're working properly before putting them away.

It's a good idea purchase a spare Mazda 3 key fob, especially if you're someone who has a tendency to lose their keys or has other issues with it. You can purchase one online or at your local automobile store, but make sure to read the reviews before buying so that you aren't purchasing an item that isn't compatible with your vehicle.

How do I change the battery using a spare key

It's a nightmare to discover that the key fob you used to use has gone out, and you are not able to unlock your vehicle. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary key button at the back of the keyfob. This will remove the key that is used as an auxiliary key, and expose a slot on both sides of the case. Put the flathead screwdriver in one of these slots. Then, gently pry apart the two halves of the case. After the battery is fully exposed, remove the case and place it somewhere you will not forget about it.

Before you begin, make sure that you have a brand new replacement battery. You can find these at any retailer that sells batteries or at a Mazda dealer close to Winter Garden. Choosing the right battery will ensure that your key fob works correctly.

Next, put the replacement battery in its place and then replace the cap on the battery. Be careful not to scratch the small rubber ring that the battery is placed on. Then press the two halves of the key fob together until you hear an audible click.

How to Reset the system's Keyless Entry System

The key fob inside your mazda 6 keys 3 is not only a convenience, it's also an important security feature. If you lose your key, or have it stolen the car won't start even if it has the spare fob. The key fob needs to be reset by the dealer to make it work again. It can be a costly and stressful experience therefore it's a great idea to understand how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will clear any residual electric current from the onboard computer. Then, disconnect the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

To program a new key or a spare, insert it into the slot and set the ignition to ON. The key should remain in the ignition for about five seconds and then switch it off. The key's details will be added to the vehicle's computer and the new fob will be able start your vehicle in the future. You can program any number of fobs you desire, but only one should be in use at any certain time. This stops unauthorized individuals from copying your key and gaining access to your vehicle. You can purchase a new key fob on the internet, but you'll still have to visit a dealer or locksmith to get it cut and programmed.