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

It's a good idea always to keep a spare key on hand regardless of whether you lost the keyfob or it stopped working. This article will explain everything you need to know about the process of adding, changing, and changing your mazda key cutting 3 key fobs.

Note: Some keys mazda require programming from a professional locksmith, while others do not. Make sure to use genuine Mazda replacements for your key fob.

How to add a spare key

If you're unable to receive a spare key from the dealer when you purchase your Mazda 3 or accidentally break your current one but don't worry, there is still an option to make another key. To do 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 open the key fob and change the battery. Find the key release auxiliary. It's on the underside of the metal component and is easy to locate. When you press the button, the back cover should be removed immediately. Then, insert the screwdriver's head into the notch or the 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. Set the ignition ON and wait for about five seconds before turning it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

You can only program three keys into 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 vehicle started. This is a security precaution designed to prevent unauthorised users, such as valet drivers, from activating your key and thereby starting your car.

how To program mazda 3 Key with only one key to reprogram an unrepaired key

It's a smart idea to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorised people from stealing your car and starting it. This should work with any mazda ignition key. You'll require two keys that are functioning for the reprogramming to begin. If you don't have the two working keys, you'll need to take your vehicle to the dealership to complete the process.

Begin by stepping into the driver's seat and shutting all doors, with the exception of the one that is open. Insert the first working key in the slot, then set the ignition to the ON position. Wait five seconds before removing 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 car in the future. Test each key to make sure that they're working properly before putting them away.

You should consider buying a spare Mazda 3 remote, especially in cases where your car is prone to problems. You can purchase one on the internet or at a local automotive store. Make sure to review the reviews before buying to ensure that you don't purchase the wrong key fob that isn't compatible with your car.

How do I change the battery with a spare key?

It's awful to discover that the key fob you used to use has gone out and you're locked out of your car. It's a good thing that it's simple to replace the battery and save some money at the dealer.

Press the auxiliary key button at the back of the keyfob. This will remove the metal key auxiliary and reveal two slots on the sides of the case. Put the flathead into one of these slots, and then gently pry the two halves apart. Once the battery is fully exposed, remove it and set aside the case somewhere you won't forget it.

Before you begin, make sure that you have a brand new replacement mazda 3 key battery. They can be bought from any store that sells batteries or from a mazda car key dealer in Winter Garden. The right kind of battery is essential to ensure that your keyfob is working correctly.

Next, put the new battery in place and replace the cap of the battery. Be careful not to scratch the rubber ring on which the battery rests. Then, press the two halves of the key fob until you hear a click.

How can I reset the Keyless Entry System

The key fob in your Mazda 3 is not only a convenience, it's also an important security feature. If you lose your key or have it stolen the car will not start even if you've got the spare fob. This is because the fob that you have to be reprogrammed by the dealership in order to work once more. This can be a painful and costly experience. Therefore, it's advisable to learn how to reset the system.

To reset the system, remove the battery for around 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect both the LF-ECU connector and the demand switch connectors. After that, test for continuity between the following terminals:

Place the key in the slot, then turn on the ignition. Switch off the ignition after approximately five seconds. The key's information is added to the vehicle's computer and the new fob is able to start your vehicle. You can program as many fobs you would like however only one should be in use at any certain time. This will stop unauthorised people from copying your key and getting ahold of your car. You can purchase a brand new keyfob online, but it will still need to be cut and programmed by an authorized dealer.