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

If you've dropped your key fob on the floor or it just stopped working, it's best to have a spare key on hand. This article will go over everything you should know about adding, changing, or changing the programming of your Mazda 3 key fobs.

A word of caution Certain keys need to be programmed by a locksmith professional or dealer, whereas other keys do not. Be sure to only make use of official 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 dealership key replacement 3 or accidentally break your current one but don't worry, there is still the option of adding another key. To do this, you'll need a small flathead screwdriver and the new CR2025 batteries. Once you've got the tools and are ready to access the key fob and replace the battery. Find the key release auxiliary. The button is beneath the metal part. It's easy to find. The back cover should come off the moment you press the button. Then, place the screwdriver head into the notch at the top or the space, and take the metal part away.

Insert your spare or new key into the slot after you have removed the accessory key. Turn the ignition on and wait for about five seconds, and then turn it to OFF. This will add the new key's details to the system and allow it to start your vehicle in the future.

It's important to keep in mind that you can only program up to three keys for your Mazda 3. You don't want to use more than two key fobs to start your vehicle. This is a safeguard to prevent unauthorized users from activating your keys and launching your car.

How to reprogram a spare key?

It's a smart idea to know how to reprogram an extra key in the event that the original key is lost or stolen. This will stop unauthorized persons from stealing your car and starting it. This will work with any Mazda. You will require two keys that work to begin the reprogramming. If you don't own two keys that work, it's best to take your car to a dealer to get this completed.

Start by stepping into driver's position and closing all the doors except the one that is open. Turn the ignition on and insert the first working key. For five seconds, take the key out and repeat the process with the second key.

After you've programmed your new key, you'll have three working keys you can use to start your car in the future. Before you store each key, make sure that it's working correctly.

You should consider buying a spare Mazda 3 remote, especially if your car is prone to problems. It's possible to find one on the internet or at a local automotive retailer, but make sure to read the reviews before purchasing so that you can avoid purchasing an item that isn't compatible with your car.

How to Change the Battery on a Spare Key

There's nothing more frustrating than finding that the battery in your key fob has failed and you are unable to unlock your car. It's a good thing that it's simple to replace the battery and save yourself some money at the dealer.

The first step is to press the auxiliary key button on the back of the key fob. This will remove the key's metal cover and reveal two slots on the opposite side of the case. The flathead should be inserted into one of these slots and gently pry the two halves apart. Once the battery is fully exposed, take it out and place the case somewhere safe from being lost.

Before you begin, be sure you have a new replacement battery. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The right kind of battery is crucial to ensure that your keyfob works properly.

Replace the cap on the battery and then insert the new battery. Be careful not to scratch the rubber ring on which the battery rests. Then, press the two halves of the key fob together until you hear the sound of clicking.

How to Reset the Keyless Entry System

The key fob that you have 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 will not start even if it has the spare fob. This is because the fob that you have to be reprogrammed at the dealership to function properly. It's a difficult and expensive ordeal. So, it's best to understand how you can reset the system.

Disconnect the battery from the system for 15 minutes. This will take out any remaining electricity from the onboard computer. Next, disconnect both the connectors for the LF-ECU and the demand switch connectors. Check for continuity between the terminals.

To program the new key or spare, place it in the slot and set the ignition to ON. Leave the key in for around five seconds, and then turn off. The information from the key will be added to your vehicle's computer, and the new fob will be able to start your vehicle in the future. You can program as many fobs as desire however only one should be used at any certain time. This will prevent unauthorized persons from copying the key and getting ahold of your car. You can purchase a brand new keyfob from the internet, however it'll still need to be programmed and cut by a dealer.