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What NOT To Do With The Mazda 6 Key Industry
How to Add, Change, and Reprogram a Mazda 3 Spare Key

Whether you dropped your key fob on the ground or it has stopped working, it's always recommended to keep a spare key handy. This article will provide everything you must be aware of adding, changing, or reprogramming your Mazda 3 key fobs.

A word of caution Certain keys need to be programmed by a locksmith professional or dealer, while others don't. Only use authentic Mazda replacements to replace your key fob.

How do I add a spare key

You can add an additional key if you don't have a spare key available or in the event that you break the one you have. To accomplish this, you'll require an incredibly small screwdriver, a flathead screwdriver, and the new CR2025 batteries. Once you've got these items, it is time to open the key fob. Find the key release auxiliary. It's on the underside of the metal part and is easy to locate. The cover on the back should fall off the moment you press the button. Then, put the screwdriver head into the notch at the top or in the space, and pull the metal piece off.

Insert mazda 3 key or new key into the slot after you have removed the auxiliary 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.


It is only possible to program three keys into your Mazda 3. You don't want to utilize more than two keys to start your vehicle. This is a precautionary measure to stop unauthorized users from activating your keys and then starting your car.

How to reprogram a spare key

If you have a spare key, it's best to be aware of how to reprogram it in case your original key is stolen or lost. This will stop unauthorised people from abusing your vehicle and re-starting it. This method should work on any Mazda but you'll need two keys working to begin the reprogramming process. If you don't have two working keys, you'll have to take your vehicle to the dealer to get it done.

Begin by stepping into your driver's seat and close the door, except for the one that's already opened. Place the first working key in the slot, then turn the ignition to ON. After five seconds, remove the key and repeat the procedure with the second key.

Once you've programmed your new key, you should have three keys that you can use to start your vehicle in the future. Before you store each key, make sure it's working properly.

It's a good idea to buy a spare Mazda 3 key fob, especially if you're someone who frequently loses their key or has other issues with it. You can purchase one online or in your local auto store. Be sure to look up reviews before you purchase to ensure that you don't purchase a key fob which isn't compatible with your vehicle.

How to change the Battery on a spare key

There's nothing worse than discovering that your key fob battery has died and you can't unlock your car. It's a good thing that it's simple to replace the battery and save yourself some cash at the dealership.

Press the auxiliary key button on the back of the keyfob. This will release the metal auxiliary key and expose a slot on both sides of the case. Press the flathead into one of these slots and then gently pull the two halves of the case apart. Once the battery has been fully exposed, take it out of the case and put it in a spot where you'll never forget it.

Be sure to bring an extra battery in place before you start. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is crucial to ensure that your keyfob is working properly.

Then, place the new battery in its place and then replace the cap on the battery. Be careful not to damage the rubber ring that holds the battery. Then, press the two parts of the key fob until you hear the sound of a click.

How can I reset the Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It's also an important security feature. The car won't start if your key is lost or stolen, even if you've got a spare key fob. This is because the key fob needs to be reprogrammed at the dealership to function properly. It can be a costly and frustrating experience therefore it's a great idea to learn how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect the LF -ECU and demand switch connectors. After that, test for 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 minutes. The key's information has been added to the vehicle's computer and the new fob can start your car. You can program up to three fobs however, you should only use one at each time. This will stop unauthorised people from copying your key and getting ahold of your car. You can purchase a replacement keyfob online, but it still needs to be cut and programmed by a dealer.