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

It's a good idea to have a spare key on hand in case you lose the keyfob or it was unable to function. This article will explain everything you should know about changing, adding, and changing the programming of your mazda key 3 key fobs.

Warning: Some keys require programming from professional locksmiths, while others do not. Be sure to only use genuine Mazda replacements for your key fob.

How to add a spare key

If you're not fortunate enough to receive a spare keys from the dealership when you purchase your Mazda 3 or accidentally break your current one, don't worry -- there's a way to add another key. To do this, you'll need an inexpensive flathead screwdriver as well as a new CR2025 battery. Once you've got these items and tools, you're ready to open the key fob. First find the key release button for the auxiliary key. It's located under the metal component and is easy to locate. The cover that covers the back should come off when you press the button. Then, put the screwdriver's head into the notch on top or into the space and pull the metal piece off.

Once the auxiliary key is removed, insert your new or spare key into the slot. Set the ignition to ON, and wait about five seconds before setting it to OFF. This will register the new key's information into the system, allowing it to start your car in the future.

It is important to remember that you can only program up to three keys for your Mazda 3. The one thing you don't want is to have more than two functioning key fobs and not be in a position to get your car started. This is a security measure designed to prevent unauthorised users, like valet drivers who are not authorized to use your key and thereby starting your car.

How to Reprogram a Spare Key

It's a smart idea to know how to reprogram a spare key in the event that the original key is lost or stolen. This will keep unauthorised persons from starting your car or stealing it. This method should work on any mazda cx 5 key however, you'll require two keys working to begin the reprogramming process. If you don't have two working keys, you'll need to take your vehicle to the dealership to get it done.

Begin by putting yourself in the driver's seat and close the door, with the exception for the one that's already opened. Place the working key into the slot, then set the ignition to ON. Then wait five seconds before taking out the key. Repeat the process with the second key.

After you've completed programming your new mazda key fob key, you should have three working keys that you can use to start your car in the future. Test each key to make sure that they're operating correctly before putting them away.

It's a good idea to buy a spare Mazda 3 key fob, especially if you're someone who often loses your key or has other issues with it. You can find one online or at your local automobile retailer, but make sure to read reviews before buying so that you can avoid getting one that's not compatible with your vehicle.

How do you change the battery using a spare key

It's awful to discover that your key fob has failed, and you are not able to unlock your vehicle. Luckily, it's easy to replace the battery and save yourself some cash at the dealership.

Press the auxiliary key button at the back of the keyfob. This will remove the key auxiliary to reveal slots on both sides of the case. Use the screwdriver's flathead to push it into one of these slots and then gently break the two parts of the case. Once the battery is fully exposed, take it out and place it in a safe place somewhere safe from being lost.

Before you begin, be sure that you have a brand new replacement battery. They can be bought at any store that sells batteries or from a Mazda dealer in Winter Garden. The correct battery is vital to ensure that your key fob functions properly.

Next, put 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 Open a Mazda cx 5 key Fob do you reset the Keyless Entry System

The key fob that you have in your mazda keyless entry 3 is not only a convenience, it's also an important security feature. The car won't start if the key is lost or stolen even if you have a spare fob. The key fob needs to be reprogrammed by the dealer to allow it to work again. This can be a painful and costly ordeal. Therefore, it's best to understand how you can reset the system.

To reset the system, remove the battery for approximately 15 minutes. This will remove any remaining electric current from the onboard computer. Then, disconnect both the LF-ECU and demand switch connectors. Verify that the connections are in good order between the terminals.

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