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

It's a good idea always to have a spare key on hand no matter if you've dropped the keyfob or it has stopped working. This article will explain how to add, modify or reprogramme your Mazda 3 keyfobs.

A word of caution Some keys require programming by a locksmith professional or dealer, while other keys do not. Make sure to make use of official Mazda replacements for your key fob.

How do you add an additional key

You can also add an additional key if you don't have a spare key or if you accidentally damage the one you already have. You'll need to use a flathead screwdriver and a new CR2025 battery. Once you've got these items you can access the key fob to change the battery. Find the key release auxiliary. It's located on the underside of the metal piece and is easy to find. The cover that covers the back should come off the moment you press the button. Next, place the head of the screwdriver into the notch, or the spacing at the top of the metal piece and pry it off.

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

It's important to know that you can only program up to three keys on your Mazda 3. You don't want to use more than two keys to start your car. This is a security measure designed to stop unauthorized users, like valet drivers who are not authorized to use your key and thereby launching your vehicle.

How to reprogram an unrepaired key

If you have a spare key, it's a good idea to be aware of how to reprogram it in the event that your original key gets lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This procedure should work with any mazda car keys but you'll need two working keys to start the reprogramming. If you don't own two keys that function then it's best to bring your mazda key cutting to a dealer to have this done.

Start by stepping into the driver's position, and closing all the doors except the one that is open. Turn the ignition on and insert the initial working key. Wait for five seconds, then take the key out and repeat the procedure with the second working key.

Once you've completed programming your new key, you should have 3 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 to buy an extra mazda keyless entry remote 3 key fob, especially if you're someone who frequently loses their key or has other issues with it. It's possible to find one on the internet or at your local automobile store, but be sure to read reviews before buying so that you aren't buying one that's not compatible with your vehicle.

How to Change the Battery on a spare key

It's depressing to find out that your key fob has died, and you are in a position to not unlock your vehicle. Fortunately, 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 take out the key made of metal and reveal the slots on both sides of the case. The flathead should be inserted into one of these slots and then gently push the two halves apart. When the battery is completely exposed, remove it and place it in a safe place in a place where you will not forget it.

Before you begin, be sure that you have a new replacement key for mazda 2 battery. You can find these at any store that sells batteries or at a Mazda dealer near Winter Garden. The correct battery is crucial to ensure that your key fob functions properly.

Next, put the replacement battery in its place and then replace the cap of the battery. Be careful not to damage the small rubber ring that the battery sits on. Finally press the two halves of the key fob until you hear the sound of a click.

How to reset a Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It also serves as a security measure. If you lose your key or have it stolen the car won't start even if you have the spare key fob. This is because the key fob needs to be reprogrammed at the dealership to work again. It can be a costly and frustrating experience It's a good idea to understand how to reset the system yourself.

To reset the system, unplug the battery for around 15 minutes. This will eliminate any remaining electrical power in the on-board computer. Then, disconnect both the LF-ECU connector as well as the demand switch connectors. After that, test for continuity between the following terminals:

Put the key in the slot and switch the ignition on. Switch off the ignition after approximately five minutes. The key's information will be added to the vehicle's computer and the new fob will be able to start your car in the future. You can program as many fobs as you desire however only one should be used at any given time. This will stop unauthorised people from copying your key and getting ahold of your car. You can buy a new keyfob online, but it must be cut and programmed by an authorized dealer.