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7 Little Changes That Will Make The Difference With Your Mazda 6 Key
How to Add, Change, and Reprogram a Mazda 3 Spare Key

It's a good idea always to have an extra key at hand no matter if you've dropped your keyfob or it has stopped working. This article will teach you how to add, change or reprogramme your Mazda 3 keyfobs.

A word of warning Certain keys need to be programmed by a professional locksmith or dealer, whereas other keys do not. Be sure to only use official Mazda replacements for your key fob.

How to add an additional key

If you're unable to find a spare key from the dealership when you buy your Mazda 3 or accidentally break the one you have but don't worry, there is still a way to add another key. You'll need to use a flathead screwdriver, and a CR2025 new battery. Once you have these items and are ready to open up the key fob to change the battery. First look for the key release button for the auxiliary key. It's on the underside of the metal piece and is easy to locate. When you press the button, the back cover will fall off instantly. Then, insert the head of the screwdriver into the notch or spacing on the top of the metal part and pull it away.

Insert mazda 3 car keys or new key into the slot after taking out the accessory key. Turn on the ignition and wait for approximately five seconds, then turn it to OFF. This will add the new key's information to the system that will allow it to start your car in the future.

It is only possible to program three keys on your Mazda 3. The one thing you don't want is to have more than two functioning key fobs, and not be capable of getting your vehicle started. This is a security measure designed to prevent unauthorised users, like valet drivers, from activating your key and starting your vehicle.

How do you reprogram a spare key?

It's smart to learn how you can reprogram an extra key in the event that your original key gets lost or stolen. This will keep unauthorized people from stealing your car and starting it. This procedure should work with any Mazda however, you'll require two keys working to begin the reprogramming process. If you don't have two working keys it's recommended to take your Mazda to the dealer to have this done.

Begin by getting in your driver's seat, and shutting the door, excluding for the one that's open. Turn the ignition on and insert the first working key. Then wait five seconds before taking out the key. Repeat the process with the second key.

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

It's a good idea to purchase a spare Mazda 3 key fob, especially if your car is one who frequently loses their key or has other issues with it. You can purchase one online or in your local auto store. Make sure you review the reviews before buying to ensure you don't buy a key fob which isn't compatible with your car.

How do I change the battery on a spare Key

There's nothing worse than finding 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 on the back of the keyfob. This will release the key's metal cover and reveal the slots on both sides of the case. Use the screwdriver's flathead to push it into one of these slots. Then, gently pry apart the two sides of the case. After the battery is fully exposed, take it out of the case and put it somewhere you will not forget about it.

Be sure to bring an extra battery in place prior to starting. They can be bought at any store selling batteries or from a Mazda dealer in Winter Garden. The right kind of battery is essential to ensure that your keyfob is working properly.

Then, place the new battery in its place and then replace the cap on the 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 inside your Mazda 3 is not only an option for convenience, it's an important security feature. The car won't start if your key is lost or stolen, even if you've got an extra fob. The key fob has to be reset by the dealer to enable it to function again. It can be a stressful and costly process. Therefore, it's advisable to understand how you can reset the system.

To reset the system, unplug the battery for about 15 minutes. This will eliminate any remaining electricity in the on-board computer. Next, disconnect both the LF-ECU connector as well as the demand switch connectors. Check for continuity between the following terminals:


Place the key in the slot and switch on the ignition. Keep the key in place for around five seconds and then switch off. The key's information is added to the vehicle's computer and the new fob can start your vehicle. You can program up to three fobs however, you must only use one at one time. This will keep unauthorised individuals from stealing your key and getting access to your vehicle. You can buy a new key fob on the internet, but you'll still need to visit an expert locksmith or dealer to get it cut and programmed.