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

It's a good idea to have an extra key at hand, whether you dropped your keyfob, or it stopped working. This article will show you how to add, alter, and reprogramme your Mazda 3 keyfobs.

A word of caution Certain keys require programming by a locksmith professional or dealer, while other keys don't. Only use genuine Mazda replacements to replace your key fob.

How to add a spare key

If you're not lucky enough to find a spare key from the dealership when you purchase your Mazda 3 or accidentally break the one you have but don't worry, there is still an option to get another key. To do this, you'll need an inexpensive flathead screwdriver as well as a new CR2025 battery. Once you've got the tools then it's time to remove the key fob and swap the battery. Find the auxiliary key release. It's on the underside of the metal portion and is easy to locate. Once you press the button, the cover should fall off right away. Next, place the head of the screwdriver into the notch or spacing on the top of the metal component and then pull it off.

After the auxiliary keys are removed, insert the new or spare key into the slot. Set the ignition ON and wait for about five seconds, and then turn it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to note that you can only program up to three keys on your Mazda 3. You don't want to use more than two key fobs to start your car. This is a security measure to stop anyone who is not authorized from activating your keys and starting your car.

How to reprogram an unrepaired key?

If you have a spare key, it's a good idea to know how to reprogram it in case your original key gets stolen or lost. This will prevent unauthorized people from starting your vehicle or taking it. This procedure should work with any Mazda, though you'll need two keys that work to begin the reprogramming process. If you don't have two functioning keys, you'll have to take your vehicle to a dealership to complete the process.

Begin by stepping into the driver's seat and shutting all doors, with the exception of the one that is open. Insert the first working key in the slot, then turn the ignition to the ON position. Take five seconds before removing the key. Repeat the process with the second key.

Once you've programmed your new key, you'll have three keys that you can use to start your car in the future. Check each key to make sure that they're functioning properly before putting them away.

You should think about buying an extra Mazda 3 remote, especially when your car is susceptible to problems. You can purchase one online or at a local automotive store. Make sure you go through reviews prior to purchasing to ensure that you don't get one that's not compatible with your car.

How to Change the Battery on a Spare Key

There's nothing more frustrating than discovering that your key fob battery has died and you can't unlock your car. Luckily, it's easy to replace the battery and save yourself some cash at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will release the metal key auxiliary and reveal an opening on both sides of the case. Insert the flathead screwdriver into one of these slots, and gently break the two halves of the case. Once the battery is fully exposed, remove it and set aside the case somewhere that you won't forget about it.

Before you begin, make sure that you have a new replacement battery. They can be found at any store that stocks batteries or at an mazda 3 key fob replacement dealer near Winter Garden. Using the right type of battery will ensure that your key fob functions correctly.

Next, put the new battery in place and replace the cap of the battery. Be careful not to damage the rubber ring that holds the battery. Finally, press the two halves of the key fob until you hear an audible click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a piece of equipment for convenience. It's also a security measure. The car won't start if your key is stolen or lost, even if you've got an extra fob. This is because the key fob has to be reprogrammed at the dealership to work once more. This could be a costly and frustrating ordeal, so it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will erase any residual electrical power in the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Verify the continuity between the next terminals.

To program a new key, or a spare, insert it into the slot and set the ignition to ON. Switch off the ignition after about five minutes. The key's information is transferred to the computer of your vehicle and the new fob will start your car. You can program as many fobs you want, but only one should be in use at any certain time. This will keep unauthorised individuals from stealing your key and gaining access to your vehicle. You can purchase a brand new keyfob online, but it will still need to be programmed and cut by an authorized dealer.