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

It's a good idea always to have an extra key at hand regardless of whether you lost the keyfob you were using or it has stopped working. This article will teach you how to add, alter or reprogramme your Mazda 3 keyfobs.

Warning: Some keys require programming from an experienced locksmith, whereas others do not. Only use genuine mazda transponder key programming replacements to replace your key fob.

How do I add a spare key?

You can also add another key in the event that you don't have a spare key or in the event that you break the one you have. To accomplish this, you'll need a small screwdriver with a flat head and a new CR2025 battery. Once you've got these items, it's time to remove the key fob to change the battery. First, locate the key release button for the auxiliary key. It's located under the metal part and is easy to find. Once you press the button, the cover should slide off immediately. Then, insert the screwdriver's head into the notch or space at the top of the metal part and then pull it off.

Insert your spare or new key into the slot after taking out the auxiliary key. Turn the ignition on and wait for five seconds, then set it to OFF. This will register the new key's details to the system which will allow it to start your vehicle in the future.

It is only possible to program three keys to your Mazda 3. You don't want to have to utilize more than two key fobs to start your car. This is a security measure designed to stop unauthorized users, like valet drivers from activating your key and thereby launching your vehicle.

How do you reprogram a spare key

If you have a spare key, it's a good idea to know how to reprogram it in case your original key gets lost or stolen. This will stop unauthorized persons from starting your vehicle or taking it. This should work with any Mazda. You'll require two keys that work for the reprogramming to begin. If you don't have two working keys, you'll need bring your car to the dealership to have it done.

Begin by stepping into your driver's seat and closing the door, except for the one that's been opened. Set the ignition to ON and then insert the first working key. After five seconds, remove the key. Repeat with the second key.

After you finish programming your new key, you should have 3 keys that work to start your car in the near future. Before saving each key, be sure that it's working correctly.

It's a good idea buy an extra Mazda 3 key fob, especially if you're a driver who has a tendency to lose their keys or has other issues with it. You can purchase one on the internet or in your local auto store. Make sure to look up reviews before you purchase so that you don't get the wrong key fob that isn't compatible with your vehicle.

How do you change the battery on a spare key

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

Press the auxiliary key button on the back of the keyfob. This will take out the key's metal cover and reveal an opening on each side of the case. Use the screwdriver's flathead to push it into one of these slots and gently take apart the two halves of the case. Once the battery is fully exposed, remove it and put it away somewhere safe from being lost.

Before you begin, make sure you have a new replacement battery. You can find these in any store that sells batteries or at an Mazda dealer close to Winter Garden. The right type of battery is vital to ensure that your keyfob is working correctly.

Replace the cap of the battery and then put in the new battery. Be careful not damage the rubber ring on which the battery rests. Finally, press the two halves of the key fob until you hear the sound of clicking.

How to Reset the Keyless Entry System

The key fob on your Mazda 3 is not only an extra convenience, but also an important security feature. If you lost your key or had it stolen the car won't start even if you've got the spare fob. The key fob must be reprogrammed by the dealer to make it work again. It's a difficult and costly experience. So, it's best to learn how much to replace mazda key fob to reset the system.

Remove the battery from the system for 15 minutes. This will remove any residual electricity in the on-board computer. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Verify that the connections are in good order between the terminals.

Put the key in the slot and switch on the ignition. Keep the key in place for around five seconds and then switch off. The information from the key will be saved to your car's computer and the new mazda key cost fob will be able to start your vehicle in the future. You can program as many fobs you need, but only one should be used at a particular time. This will keep unauthorised individuals from stealing your key and getting access to your vehicle. You can purchase a new key fob on the internet, but you'll still need to go to an authorized locksmith or dealer to cut it and programmed.