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

If you've dropped your key fob on the floor or it has stopped working, it's an excellent idea to keep an extra key available. This article will provide everything you need to learn about adding, changing, and changing your Mazda 3 key fobs.

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

How to add a spare key

You can add another key in the event that you don't have a spare key, or in the event that you break the one you have. To do this, you'll need a small screwdriver with a flat head and an updated CR2025 battery. Once you have the items, it is time to open the key fob. Locate the auxiliary key release. It's located on the underside of the metal part. It's easy to find. When you press the button, the cover should slide off immediately. Then, you can insert the screwdriver's head into the notch or spacing on the top of the metal component and pry it off.

Once the auxiliary key is removed, insert your new or spare key into the slot. Switch the ignition on and wait for approximately five seconds before turning it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

You can only program three keys on your Mazda 3. The most important thing is to have more than two functioning key fobs but not be able to get your car started. This is a security measure that is designed to block unauthorized users, such as valet drivers who are not authorized to use your key and starting your vehicle.

How to Reprogram a Spare Key

It's a smart idea to be aware of how to reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorized persons from starting your car or stealing it. This will work with any Mazda. You will require two keys that work for the reprogramming to begin. If you don't own two working keys, it's best to take your mazda key fob replacement to a dealer to have this completed.

Begin by getting in your driver's seat, and closing the door, except for the one that's opened. Set the ignition to ON and then insert the first working key. After five seconds, take the key out and repeat the process with a second key.

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

It is advisable to purchase a spare Mazda 3 remote, especially in cases where your car is prone to problems. You can purchase one online or at a local automotive store. Be sure to go through reviews prior to purchasing to ensure you don't buy an item that isn't compatible with your car.

How to change the battery using a spare key

There's nothing worse than finding that your key fob battery 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 dealership.

The first step is to press the auxiliary key button located on the back of the key fob. This will remove the metal auxiliary key and expose slots on both sides of the case. Put the flathead into one of these slots and then gently pry the two halves apart. When the battery is completely exposed, take it out and put it away in a place where you will not forget it.

Before you begin, be sure you have a new replacement battery. They are available at any retailer that sells batteries or at a Mazda dealer near Winter Garden. Choosing the correct battery will ensure that your key fob operates correctly.

Replace the battery cap and then replace the battery. Be careful not to damage the small rubber ring the battery sits on. Finally, press the two parts of the key fob until you hear the sound of a click.

How do I reset the Keyless Entry System

The mazda replacement keys 3 key fob is not just a practical feature. It's also a security measure. If you lose your key or had it stolen, the car will not start even if you have the spare fob. This is because the key fob has to be reprogrammed at the dealership in order to work again. This can be a costly and time-consuming process It's a good idea to understand how to reset the system yourself.

To reset the system, remove the battery for 15 minutes. This will remove any residual electricity from the onboard computer. Then, disconnect both the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

To program the new key or spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds, then switch it off. The key information is now added to the vehicle's computer and the new fob will start your car. You can program up to three fobs, but 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 purchase a new keyfob on the internet, but it still needs to be programmed and cut by an authorized dealer.