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

Whether you dropped your key fob on the floor or it just stopped working, it's a good idea to have an extra key in your pocket. This article will provide everything you need to be aware of the process of adding, changing, and programming your Mazda 3 key fobs.

Be aware that some keys require programming by an expert locksmith, while others do not. Make sure you only use genuine Mazda replacements for your key fob.

How to Add a Spare Key

If you're not lucky enough to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one but don't worry, there's still an option to make another key. You'll need a flathead screwdriver, and a new CR2025 battery. Once you've got the tools, it's time to open up the key fob and replace the battery. Locate the auxiliary key release. The button is located on the bottom of the metal portion. It's easy to locate. Once you hit the button, the cover should be removed immediately. Then, insert the screwdriver head into the notch at the top or the space, and pull the metal piece off.


Insert your spare or new key into the slot after taking out the accessory key. Set the ignition to ON, and wait about five seconds before turning 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 have to utilize more than two key fobs to start your vehicle. This is a safety measure to stop unauthorised users from activating your key fobs and starting your car.

How to Reprogram a Spare Key

It's a good idea to know how you can reprogram a spare key in the event that your original key gets lost or stolen. This will keep unauthorized people from abusing your vehicle and re-starting it. This procedure should work with any Mazda however you'll need two keys that work to begin the reprogramming process. If you don't have the two working keys, you'll need bring your vehicle to the dealership to get it done.

Begin by stepping into your driver's seat, and shutting the door, excluding for the one that's already opened. Set the ignition to ON and insert the initial working key. After five seconds, remove the key. Repeat the process with the second key.

After you finish programming your new key you should have 3 keys that start your car in the future. Before you store each key, make sure that it's working correctly.

You should think about purchasing a spare Mazda 3 remote, especially when your car is susceptible to problems. You can purchase one online or at your local auto store, but be sure to read reviews prior to purchasing so you can avoid purchasing one that's not compatible with your car.

How do I change the battery on a spare key?

It's a nightmare to discover that your key fob has died and you're in a position to not unlock your car. It's easy to replace the battery yourself and save money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will take out the metal key auxiliary and reveal two slots on the sides of the case. Press the flathead screwdriver into one of these slots and gently pry apart the two parts of the case. Once the battery has been fully exposed, take it out of the case and put it somewhere you will not forget about it.

Be sure to have a replacement battery before you begin. You can purchase them at any store that sells batteries or at a Mazda dealer close to Winter Garden. Choosing the correct battery will ensure that your key fob works correctly.

Replace the cap on the battery and then replace the battery. Be careful not damage the rubber ring that holds the battery. Finally, press the two halves of the key fob together until you hear a click.

How can I reset the Keyless Entry System

The key fob on your Mazda 3 is not only an added convenience, but it's also an important security feature. If you lose your key, or have it stolen the car will not start even if you've got the spare fob. The key fob must be reprogrammed by the dealer to allow it to work again. This could be a costly and frustrating ordeal and it's a good idea to learn how to reset the system yourself.

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

To program an entirely new key or spare, place it in the slot and set the ignition to ON. mazda 3 keys should be turned off after approximately five minutes. The key's details are now added to the computer in your car and the new fob will start your car. You can program up to three fobs however, you must only use one at a time. This will prevent unauthorised people from stealing your key and gaining access to your car. You can purchase a new keyfob on the internet, but it will still need to be cut and programmed by a dealer.

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Pub: 19 Apr 2024 05:09 UTC
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