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

It's a good idea to keep an extra key in your pocket no matter if you've dropped the keyfob you were using or it was unable to function. This article will explain how to add, modify or reprogramme your Mazda 3 keyfobs.

Be aware that some keys require programming from an experienced locksmith, whereas others don't. Make sure you use only authentic Mazda replacements to replace your key fob.

How to add a spare key

If you're not lucky enough to receive a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one do not fret -- there is still an option to get another key. You'll need to use the flathead screwdriver, as well as a new CR2025 battery. Once you have these items, it's time to open up the key fob to change the battery. First find the auxiliary key release button. It's located underneath the metal component and is easy to locate. Once you press the button, the back cover should slide off immediately. Then, you can insert the screwdriver's tip into the notch at the top or into the space and remove the metal part.

Insert your spare or new key into the slot after you have removed the additional key. Switch the ignition on and wait for approximately five seconds, then turn it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The last thing you want is to have more than two functioning key fobs and not being in a position to get your vehicle started. This is a safety precaution designed to prevent unauthorised users, such as valet drivers who are not authorized to use your key and starting your car.

How do I reprogram an unrepaired key?

It's a smart idea be aware of how to reprogram a spare 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 method should work on any mazda replacement keys, though you'll need two working keys to start the reprogramming process. If you don't own two keys that function, you should take your Mazda 5 Key Fob to a dealer to have this done.

Start by stepping into the driver's seat, shutting all doors, with the exception of the one that is open. Set the ignition to ON and insert the initial working key. For five seconds, remove the key and repeat the process with the second key.

Once you've finished programming your new key, you should have three working keys that you can use to start your vehicle in the future. Check each key to make sure they're working correctly before taking them off.

You should think about buying an extra Mazda 3 remote, especially if your car is prone to problems. You can purchase one online or at your local automobile retailer, but make 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

It's very frustrating to discover that your key fob has died and you're locked out of your vehicle. It's easy to change the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will remove the key auxiliary and reveal an opening on both sides of the case. Put the flathead into one of these slots, and then gently pry the two halves apart. After the battery is fully exposed, remove the case and place it somewhere that you will not forget it.

Make sure you have a new battery ready prior to starting. You can purchase them at any store that sells batteries or at a Mazda dealer near Winter Garden. Choosing the correct battery will ensure that your key fob functions properly.

Replace the cap on the battery and then insert the new battery. Be careful not to scratch the small rubber ring that the battery sits on. Finally, press the two parts of the key fob together until you hear the sound of 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 it has the spare key fob. The key fob should be reprogrammed by a dealer to enable it to function again. It's a difficult and expensive ordeal. Therefore, it's advisable to learn how to reset the system.

To reset the system, remove the battery for 15 minutes. This will eliminate any residual electricity from the on-board computer. Next, disconnect the LF-ECU and demand switch connectors. Verify the continuity between the next terminals.

Place the key in the slot and turn on the ignition. Stop the ignition after about five seconds. The key's information has been added to the computer in your car and the new fob can start your car. You can program up to three fobs however, you should only use one at each time. This will keep unauthorised individuals from stealing your keys and getting access to your car. You can buy a new key fob on the internet, but you'll still need to visit a dealer or locksmith to have it cut and programmed.