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

It's a good idea to keep an extra key at hand regardless of whether you lost the keyfob or it has stopped working. This article will explain how to add, modify, and reprogramme your Mazda 3 keyfobs.

Warning: Some keys require programming by a professional locksmith, while others do not. Only use genuine Mazda replacements to replace your key fob.

How do I add a spare key?

If you're not fortunate enough to receive a spare keys from the dealership when you buy your Mazda 3 or accidentally break the one you have but don't worry, there's an option to make another key. You'll need to use the flathead screwdriver, as well as an CR2025 battery. Once you've got all the equipment, it is time to open the key fob. First, locate the button that allows you to release the key. It's located on the bottom of the metal portion. It's easy to find. When you press the button, the back cover should slide off immediately. Then, you can insert the screwdriver's head in the notch at the top or the space and pull the metal piece off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON, and wait for about five seconds before setting 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 in your Mazda 3. The final thing you want is to have more than two working key fobs, and not be in a position to get your car started. This is a precautionary measure to prevent unauthorized users from activating your keys and starting your vehicle.

How to reprogram a spare key

It's smart to know how to reprogram an extra key in the event that your original key is lost or stolen. This will stop unauthorized persons from abusing your vehicle and re-starting it. This will work with any Mazda. You will require two keys that are working to start the reprogramming process. If you don't have two working keys, it's best to take your vehicle to a dealer to have this done.

Start by getting into the driver's position and shutting all doors, with the exception of the one that is open. Turn mazda 2 key replacement on and insert the first working key. Take five seconds before removing the key. Repeat with the second key.

After you've programmed your new key, you should have three working keys you can use to start your car in the future. Test each key to ensure sure they're working correctly before putting them away.

You should think about buying a spare Mazda 3 remote, especially in cases where your car is prone to problems. You can buy one online or at a local automotive store. Make sure to review the reviews before buying to ensure you don't buy a key fob which isn't compatible with your car.

How to Change the Battery on a spare Key


It's very frustrating to discover that your key fob has failed, and you are unable to unlock your car. It's easy to change the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will detach the key from the metal and reveal the slots on both sides of the case. The flathead should be inserted into one of these slots, and gently pry the two halves of the case apart. After the battery is fully exposed, take it out of the case and place it in a place where you won't forget about it.

Be sure to have a replacement battery prior to starting. They are available at any store that stocks batteries or at an Mazda dealer near Winter Garden. The correct battery is vital to ensure that your keyfob is working correctly.

Then, place the new battery in the correct place and replace the cap of the battery. Be careful not damage the rubber ring on which the battery rests. Press the two halves together until you can hear the click.

How to Reset the Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also an element of security. If you lost your key or had it stolen the car won't start even if you have the spare key 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.

To reset the system, disconnect the battery for 15 minutes. This will remove any residual electrical power in the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Verify the continuity between the next terminals.

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. Stop the ignition after about five seconds. The key's information will be saved to your car's computer, and the new fob will be able to start your vehicle in the future. You can program as many fobs as you need however only one should be used at any given time. This will stop unauthorized individuals from stealing your keys and gaining access to your vehicle. You can purchase a brand new key fob online, however you'll need to visit a dealer or locksmith to have it cut and programmed.

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Pub: 19 Apr 2024 01:17 UTC
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