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

Whether you dropped your key fob on the ground or it just stopped working, it's recommended to keep a spare key handy. This article will tell you how to add, alter, and reprogramme your Mazda 3 keyfobs.

Note: Some keys require programming by an expert locksmith, while others do not. Use only genuine Mazda replacements to replace your key fob.

How to add a spare key

You can add an additional key in case you don't have a spare key, or in the event that you break your current one. You'll need a flathead screwdriver, and an CR2025 battery. Once you have the items then it's time to open the key fob. Find the key release auxiliary. It's located on the underside the metal portion. It's easy to find. The cover that covers the back should come off the moment you press the button. Next, insert the screwdriver's head into the notch or spacing at the top of the metal part and pull it off.

Once the auxiliary key has been removed, insert your 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 register the new key's information into the system which will allow it to start your car in the future.

It is important to remember that you can only program up to three keys for your mazda cx 9 key fob 3. You don't want to utilize more than two key fobs to start your vehicle. This is a safety measure designed to prevent unauthorized users, like valet drivers, from activating your key and starting your vehicle.

How to reprogram a spare key?

If you have a spare key it's best to know how to program it if your original key is stolen or lost. This will stop unauthorised people from getting into your car and causing damage to it. This will work with any Mazda. You'll need two keys that are functioning to begin the reprogramming process. If you don't have two working keys, you'll need take your vehicle to a dealership to get it done.

Start by stepping into the driver's seat, close all the doors with the exception of the one that is open. Insert the first working key into the slot, and then turn the ignition to the ON position. Wait for five seconds, then remove the key and repeat with the second key.

After you finish programming your new key, you'll have 3 keys that will 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 if your car is prone to issues. You can find one online or at your local automotive retailer, but make sure to read reviews before buying so you can avoid getting an item that isn't compatible with your car.

How do I change the battery on a spare key

There's nothing worse than finding that the battery for your key fob has gone out and you're not able to unlock your vehicle. It's a good thing that it's simple to replace the battery and save some cash at the dealership.

The first step is to press the auxiliary key button that is located on the back of the key fob. This will take out the key made of metal and reveal a slot on each side of the case. Press the flathead screwdriver into one of these slots. Then, gently pry apart the two parts of the case. When the battery is fully exposed, take it out of the case and put it somewhere you will not forget it.

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

Replace the cap of the battery and then replace the battery. Be careful not to damage the rubber ring that holds the battery. Then press the two parts of the key fob until you hear a click.

How do I reset the Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It also serves as a security feature. If you lose your key or have it stolen, the car will not start even if you've got the spare fob. This is because the key fob needs to be reprogrammed at the dealership to work once more. This can be a painful and costly ordeal. So, it's best to learn how to reset the system.

Disconnect the battery from the system for 15 minutes. This will eliminate any residual power from the on-board computer. Next, disconnect both the LF-ECU connector and the demand switch connectors. Verify that the connections are in good order between the terminals.

To program a new key, or a spare, place it in the slot and turn the ignition to ON. Leave the key in for about five seconds and then turn off. The key's details are now transferred to the computer of your vehicle and the new fob can start your vehicle. You can program up to three fobs, but you must only use one at one time. This will prevent unauthorized people from stealing your keys and gaining access to your car. You can purchase a new keyfob on the internet, but it must be programmed and cut by an authorized dealer.