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

It's a good idea to have a spare key on hand no matter if you've dropped the keyfob or it was unable to function. This article will explain how to add, modify or reprogramme your Mazda 3 keyfobs.

A word of warning: some keys require programming by a locksmith professional or dealer, whereas others don't. Only use official Mazda replacements to replace your key fob.

How to add a spare key

You can add a second key if you don't have a spare key or if you accidentally break your current one. To do this, you'll need a small screwdriver with a flat head and an updated CR2025 battery. Once you've got all the equipment and tools, you're ready to open the key fob. First, locate the key release button for the auxiliary key. It's located on the underside of the metal piece and is easy to find. When you hit the button, the cover will fall off instantly. Then, insert the screwdriver's head into the notch or spacing on the top of the metal component and pull it away.

Once the auxiliary key is removed, insert the new or spare key into the slot. Set the ignition to ON and wait for five seconds before turning it to off. This will register the new key's information to the system which will allow it to start your car in the future.

It is only possible to program three keys on your mazda 6 key fob 3. You don't want to have to utilize more than two keys to start your car. This is a precautionary measure to prevent unauthorized users from activating your keys and starting your vehicle.

How to Reprogram a Spare Key

It's a smart idea to learn how you can reprogram a spare key in the event that your original key gets lost or stolen. This will stop unauthorised people from starting your car, or taking it. This should work with any mazda key replacement. You will require two keys that are working to begin the reprogramming process. If you don't own two working keys, you'll have to take your vehicle to a dealership to complete the process.

Begin by stepping into your driver's seat and shutting the door, excluding for the one that's open. Set the ignition to ON and insert the initial working key. After five seconds, remove the key. Repeat with the second key.

After you've completed programming your new key, you should have three keys that you can use to start your vehicle in the future. Before saving each key, be sure it's working properly.

You should think about purchasing a spare Mazda 3 remote, especially in the event that your vehicle is prone to issues. You can find one online or at your local automobile retailer, but make sure to read reviews before purchasing so that you can avoid purchasing the wrong key fob compatible with your car.

How do you change the battery on a spare key

There's nothing worse than discovering that your key fob battery has failed and you are unable to unlock your vehicle. Luckily, it's easy to replace the battery and save some money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will take out the key's metal cover and reveal the slots on both sides of the case. Press the flathead screwdriver into one of these slots. Then, gently break the two parts of the case. When the battery is completely exposed, take it out and put it away somewhere safe from being lost.

Be sure to bring an additional battery prior to beginning. You can purchase them at any retailer that sells batteries or at a Mazda dealer close to Winter Garden. The correct type of battery is essential to ensure that your key fob functions properly.

Next, put the replacement battery in the correct place and replace the battery cap. Be careful not to scratch the small rubber ring the battery is placed on. The two halves should be pressed together until you hear a click.

How do you 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 lost your key or had it stolen the car won't start even if you have the spare fob. This is because the key fob has to be reprogrammed by the dealership to work once more. This can be an expensive and time-consuming process, so it's a good idea to know how to reset the system yourself.

Disconnect the battery from the system for 15 minutes. This will eliminate any residual electrical current from the computer on board. The next step is to disconnect the LF-ECU and demand switch connectors. Verify that the connections are in good order between the terminals.

Place the key into the slot and turn on the ignition. Leave the key in for about five seconds and then switch off. The key's information is stored in the car's computer and the new fob is able to start your vehicle. You can program any number of fobs you desire however only one should be used at a given time. This prevents unauthorized people from copying the key and gaining access to your car. You can buy a new keyfob online, but it still needs to be programmed and cut by a dealer.