20 Insightful Quotes About 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 in case you lose your keyfob, or it stopped working. This article will provide everything you need to learn about adding, changing, and changing your Mazda 3 key fobs.

A word of caution Some keys require programming by a professional locksmith or dealer, whereas other keys do not. Be sure to only use genuine Mazda replacements for your key fob.

How do you add a spare key

If you're not fortunate enough to get a spare key from the dealer when you purchase your Mazda 3 or accidentally break the one you have but don't worry, there's an option to get another key. You'll need a flathead screwdriver and a CR2025 new battery. Once you've got the tools you need, it's time to open the key fob. Locate the key release auxiliary. The button is on the underside of the metal part. It's easy to locate. The cover on the back should fall off when you press the button. Then, put the screwdriver's head in the notch on top or into the space and pry the metal part off.

Insert your spare or new key into the slot following the removal of the secondary key. Set the ignition to ON and wait for around five seconds before turning it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

You can only program three keys to your Mazda 3. You don't want to use more than two keys to start your car. This is a safety precaution designed to prevent unauthorized users, like valet drivers who are not authorized to use your key and starting your car.

How to Reprogram a Spare Key

It's a smart idea learn how you can reprogram a spare key in the event that the original key is lost or stolen. This will stop unauthorised people from starting your vehicle or taking it. This process is compatible with any Mazda however you'll need two keys working to begin the reprogramming. If you don't have two working keys, you'll have to bring your vehicle to the dealership to get it done.

Begin by getting in your driver's seat and closing the door, except for the one that's opened. Turn the ignition on and insert the initial working key. For five seconds, take the key out and repeat the process with the second working key.

Once you've programmed your new key, you'll have three working keys that you can use to start your car in the future. Before saving each key, be sure it's working properly.

It is advisable to purchase an extra Mazda 3 remote, especially in cases where your car is prone to issues. You can purchase one online or at a local automotive store, but be sure to read reviews prior to purchasing so you can avoid purchasing one that's not compatible with your car.

How do I change the battery on a spare Key

There's nothing worse than discovering that the battery in your key fob has failed and you are unable to unlock your car. It's not a problem to replace the battery and save yourself some money at the dealership.

Press mazda 5 key fob replacement G28 Car Keys on the back of the keyfob. This will remove the key's metal cover and reveal two slots on the opposite side of the case. Use the screwdriver's flathead to push it into one of these slots, and gently remove the two halves of the case. Once the battery is fully exposed, take it out and set aside the case in a place where you will not forget it.

Be sure to bring an additional battery before you start. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is vital to ensure that your key fob functions correctly.


Replace the cap on the battery, and then replace the battery. Be careful not to damage the rubber ring on which the battery rests. Then press the two parts of the key fob until you hear an audible click.

How to Reset the Keyless Entry System

The key fob in your Mazda 3 is not only an option for convenience, it's an important security feature. If you lose your key, or have it stolen the car will not start even if you have the spare key fob. The key fob should be reprogrammed by the dealer to enable it to function again. This can be a costly and stressful experience, so it's a good idea to understand how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electric current from the onboard computer. The next step is to disconnect the LF-ECU and demand switch connectors. After that, test for continuity between the following terminals:

Place the key in the slot, then switch on the ignition. Switch off the ignition after approximately five minutes. The key information is now added to the computer in your car and the new fob can start your vehicle. You can program as many fobs as want but only one can be used at any certain time. This will stop unauthorized individuals from stealing your key and getting access to your car. You can purchase a new key fob online, but you'll still need to go to an authorized locksmith or dealer to have it cut and programmed.