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

It's a good idea to keep an extra key on hand no matter if you've dropped the keyfob or it has stopped working. This article will explain everything you should be aware of adding, changing, or programming your mazda 6 key fob 3 key fobs.

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

How to add a spare key

If you're unable to receive a spare keys from the dealer when you purchase your mazda 5 key fob 3 or accidentally break the one you have but don't worry, there's the option of adding another key. You'll need the flathead screwdriver, as well as a new CR2025 battery. Once you've got these tools then it's time to access the key fob and change the battery. Locate the key release auxiliary. It's located under the metal portion and is easy to find. The back cover should come off as soon as you press the button. Next, place the screwdriver's head into the notch, or the spacing at the top of the metal part and pull 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 about five seconds before turning it to OFF. This will add the new information on the key to the system which will allow it to start your car in the future.

You can only program three keys in your Mazda 3. You don't want to have to utilize more than two key fobs to start your car. This is a safety measure to stop unauthorised users from activating your keys and launching your car.

How to Reprogram a spare key

It's a smart idea know how to reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorised people from taking your car and then starting it. This will work with any Mazda. You'll require two keys that are functioning to begin the reprogramming. If you don't own two keys that work, you should take your car to a dealer to have this completed.

Begin by stepping into your driver's seat, and close the door, except for the one that's open. Set the ignition to ON and insert the first working key. Take five seconds before removing the key. Repeat with the second key.

After programming your new key, you'll have 3 keys that will allow you to start your car in the near future. Before saving each key, be sure it's functioning correctly.

You should consider buying an extra Mazda 3 remote, especially when your car is susceptible to issues. You can find one online or at your local auto retailer, but make sure to read reviews before purchasing so that you can avoid getting an item that isn't compatible with your vehicle.

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 vehicle. It's simple to replace the battery yourself and save money at the dealership.

Press the auxiliary key button at the back of the keyfob. This will remove the key auxiliary to reveal a slot on both sides of the case. Put the flathead into one of these slots, and then gently push the two halves of the case apart. Once the battery is fully exposed, take it out of the case and put it in a place where you won't forget it.

Before you start, make sure that you have a new replacement battery. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is crucial to make sure that your keyfob functions correctly.

Replace the battery cap and then put in the new battery. Be careful not to damage the rubber ring on which the battery rests. The two halves should be pressed together until you can hear the click.

How to Reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It also serves as an important security feature. If you lost your key or had it stolen the car will not start even if you've got the spare fob. This is because the key fob has to be reprogrammed at the dealership to function properly. It can be a stressful and costly process. Therefore, it's recommended to understand how you can reset the system.

To reset the system, unplug the battery for around 15 minutes. This will clear any residual electrical current from the computer on board. Then, disconnect the LF ECU and demand switch connectors. Then, check continuity between the following terminals:

To program an entirely new key or spare, insert it into the slot and turn the ignition to ON. Switch off the ignition after approximately five minutes. The key's information is added to the vehicle's computer and the new fob will start your car. You can program up to three fobs, however, you must only use one at a time. This prevents unauthorized people from copying your key and gaining access to your vehicle. You can purchase a replacement key fob online, however you'll still have to visit a locksmith or dealer in order to have it cut and programmed.