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

If you've dropped your key fob on the ground or it just stopped working, it's always a good idea to have a spare key handy. This article will go over everything you must be aware of when changing, adding, and changing your Mazda 3 key fobs.

Be aware that some keys require programming by an experienced locksmith, whereas others do not. Make sure you use only authentic Mazda replacements to replace your key fob.

How to Add a Spare Key

If you're not fortunate enough to get a spare key from the dealer when you purchase your mazda keys replacement 3 or accidentally break your current key, don't worry -- there is still the option of adding another key. To accomplish this, you'll need a small screwdriver with a flat head and an updated CR2025 battery. Once you've got these items you need, it's time to open the key fob. First, locate the button that allows you to release the key. The button is beneath the metal portion. It's easy to find. When you hit the button, the back cover will fall off instantly. Next, insert the head of the screwdriver into the notch or spacing at the top of the metal part and then pull it off.

After the auxiliary key has been removed, insert the new or spare key into the slot. Set the ignition ON and wait for about five seconds, then turn it to off. This will add the new key's information into the system, allowing it to start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The most important thing is to have more than two functioning key fobs, and not be in a position to get your car started. This is a security precaution designed to prevent unauthorized users, such as valet drivers who are not authorized to use your key and thereby starting your car.

How to Reprogram a Spare Key

It's a good idea to learn how you can reprogram an extra key in the event that your original key gets lost or stolen. This will keep unauthorised persons from starting your car or stealing it. This will work with any Mazda. You'll need two keys that are working to begin the reprogramming. If you don't have two keys that function, you should take your Mazda to a dealer to have this completed.

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

Once you've completed programming your new key, you'll have three keys that allow you to start your car in the future. Before storing each key, make sure that it's functioning properly.

It's a good idea purchase a spare mazda keys replacement 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 auto store, but be sure to read reviews before purchasing so that you aren't purchasing a key fob that's not compatible with your car.

How to 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 car. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary key button at the back of the keyfob. This will take out the metal key auxiliary and reveal an opening on both sides of the case. Put the flathead screwdriver in one of these slots. Then, gently remove the two halves of the case. Once the battery is fully exposed, take it out of the case and place it somewhere that you will not forget it.

Be sure to have an extra battery in place before you start. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob functions properly.

Then, place the new battery in the correct place and replace the cap on the battery. Be careful not to scratch the small rubber ring the battery is placed on. Press the two halves together until you hear the click.

How do you reset the Keyless Entry System

The key fob in your Mazda 3 is not only an added convenience, but it's also an important security feature. The car will not start if your key is lost or stolen even if you have an extra fob. This is because the key fob needs to be reprogrammed by the dealership to work again. This can be a painful and costly experience. So, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will take out any remaining electricity from the onboard computer. Then, disconnect the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the terminals.

To program the new key or spare, insert it into the slot and turn the ignition to ON. Turn off the ignition after approximately five seconds. The key's details are now added to the computer in your car and the new fob will start your car. You can program as many fobs as need however only one must be used at any certain time. This stops unauthorized individuals from copying your key and getting ahold of your car. You can purchase a replacement key fob online, but you'll still need to visit an authorized locksmith or dealer to get it cut and programmed.