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

It's a good idea always to have an extra key in your pocket, whether you dropped the keyfob you were using or it stopped working. This article will go over everything you should learn about the process of adding, changing, and reprogramming your Mazda 3 key fobs.

Note: Some keys require programming by a professional locksmith, while others don't. Make sure you only use official Mazda replacements for your key fob.

How to Add a Spare Key

You can add an additional key in case you don't have a spare key available or when you accidentally damage the one you have. You'll need to use a flathead screwdriver, and a new CR2025 battery. Once you've got these tools then it's time to open the key fob and replace the battery. Find the key release auxiliary. It's located underneath the metal piece and is easy to find. The back cover should come off the moment you press the button. Then, you can insert the screwdriver's head into the notch or space on the top of the metal part and pull it away.

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

It's important to know that you can only program up to three keys on your mazda dealership key replacement 3. The last thing you want is to have more than two functioning key fobs, and not be able to get your car started. This is a safety precaution designed to stop unauthorized users, such as valet drivers, from activating your key and thereby starting your car.

How to Reprogram a Spare Key

If you have a spare key, it's best to know how to program it in the event the original key you had is stolen or lost. This will keep unauthorised persons from starting your car or stealing it. This will work with any Mazda. You'll require two keys that are working for the reprogramming to begin. If you don't have the two working keys, you'll have to bring your car to the dealer to get it done.

Begin by stepping into your driver's seat and close the door, except for the one that's open. Turn the ignition on and insert the first functioning key. Wait for five seconds, then take the key out and repeat the process with a second key.

Once you've finished programming your new key, you'll have three keys that you can use to start your vehicle in the future. Before you store each key, make sure it's working properly.

It's a good idea buy an extra Mazda 3 key fob, particularly if you're a driver who frequently loses their key or has other issues with it. You can purchase one online or in your local automotive store. Be sure to go through reviews prior to purchasing to ensure that you don't get a key fob which isn't compatible with your car.

How to change the battery on a spare key?

It's awful to discover that your key fob has failed and you're locked out of your vehicle. It's easy to replace the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will take out the metal key auxiliary and reveal two slots on the sides of the case. Press the flathead into one of these slots and then gently push the two halves apart. Once the battery has been fully exposed, take it out of the case and put it somewhere you will not forget it.

Make sure you have a replacement battery before you start. You can purchase them at any store that stocks batteries or at a Mazda dealer near Winter Garden. The correct type of battery is vital to make sure that your keyfob functions correctly.

Next, put the new battery in its place and then replace the cap of the battery. Be careful not to damage the small rubber ring that the battery is placed on. The two halves should be pressed together until you hear a click.

How do I reset the system's Keyless Entry System

The mazda key fob 3 key fob is not just a convenient feature. It's also a security measure. If you lose your key, or have it stolen the car won't start even if you have the spare fob. The key fob must be reprogrammed by a dealer to enable it to function again. It's a difficult and costly process. Therefore, it's recommended to know how to reset the system.

Disconnect the battery from the system for 15 minutes. This will remove any remaining electric current from the onboard computer. Then, disconnect both the connectors for the LF-ECU and the demand switch connectors. Verify the continuity between the next terminals.

To program a new key, or a spare, place it in the slot and set the ignition to ON. Turn off the ignition after approximately five seconds. The key information is now added to the computer in your car and the new fob can start your car. You can program up to three fobs however, you must only use one at each time. This will stop unauthorised people from copying your key and getting ahold of your vehicle. You can buy a new keyfob online, but it still needs to be programmed and cut by an authorized dealer.