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

It's a good idea to have an extra key in your pocket in case you lose your keyfob or it has stopped working. This article will teach you how to add, alter and re-programme your Mazda 3 keyfobs.

Warning: Some keys require programming by a professional locksmith, while others do not. Make sure to use genuine Mazda replacements for your key fob.

How to add a spare key

If you're not fortunate enough to receive a spare key from the dealership when you buy your Mazda 3 or accidentally break your current one but don't worry, there's still an option to make another key. To do this, you'll need an inexpensive flathead screwdriver as well as an CR2025 battery that's new. Once you've got all the equipment, it is time to open the key fob. Find the key release auxiliary. It's located underneath the metal part and is easy to locate. Once you press the button, the cover will fall off instantly. Then, you can insert the screwdriver's head in the notch at the top or into the space and pry the metal part off.

Insert your spare or new key into the slot after taking out the additional key. Set the ignition ON and wait for approximately five seconds, then turn it to OFF. This will allow the system to recognize the new key and begin your vehicle in the future.

It's important to keep in mind that you can only program up to three keys for your mazda 2 key fob replacement 3. You don't want to use more than two key fobs in order to start your vehicle. This is a safety precaution designed to stop unauthorized users, like valet drivers who are not authorized to use your key and thereby starting your car.

How do you reprogram a spare key

If you have a spare key it's best to know how to reprogram it in case your original key gets lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This will work with any Mazda. You will need two keys that are functioning for the reprogramming to begin. If you don't have two keys that work it's recommended to take your vehicle to a dealer to get this completed.

Begin by putting yourself in the driver's seat, and shutting the door, excluding for the one that's been opened. Turn the ignition on and insert the first working key. Wait for five seconds, then remove the key and repeat the procedure with the second key.

After you've completed programming your new key, you should have three working keys you can use to start your vehicle in the future. Test each key to be sure that they're functioning properly before taking them off.

It is advisable to purchase a spare Mazda 3 remote, especially if your car is prone to problems. You can buy one online or at your local auto store, but make sure to read reviews prior to purchasing so you can avoid getting an item that isn't compatible with your car.

How do you change the battery on a spare key?

There's nothing worse than discovering that the battery in your key fob has died and you can't unlock your car. It's simple to replace the battery yourself and save money 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 remove the key auxiliary to reveal a slot on both sides of the case. Put the flathead into one of these slots, and then gently push the two halves of the case apart. Once the battery is fully exposed, remove it and place the case somewhere that you won't forget about it.

Be sure to bring an extra battery in place before you begin. You can find these at any store that sells batteries or at a Mazda dealer near Winter Garden. The right kind of battery is vital to ensure that your key fob functions properly.

Then, place the new battery into place and replace the cap of the battery. Be careful not to damage the small rubber ring that the battery sits on. The two halves should be pressed together until you hear the click.

How do you reset the Keyless Entry System

The key fob inside your Mazda 3 is not only a convenience, it's also an important security feature. The car won't start if the key is stolen or lost even if you have a spare key fob. This is because the fob that you have to be reset at the dealership to work once more. It's a difficult and costly ordeal. So, it's best to know how to reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Next, disconnect both the LF-ECU and demand switch connectors. Check for continuity between the following terminals:

To program an entirely new key or spare, insert it into the slot and set the ignition to ON. Leave the key in for around five seconds and then turn 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 up to three fobs however, you must only use one at a time. This prevents unauthorized people from copying the key and getting ahold of your car. You can purchase a replacement key fob online, but you'll still need to visit an authorized locksmith or dealer to cut it and get it programmed.