How to Add, Change, and Reprogram a Mazda 3 Spare Key
It's a good idea to have an extra key at hand in case you lose your keyfob, or it was unable to function. This article will go over everything you need to be aware of changing, adding, and reprogramming your Mazda 3 key fobs.
A word of caution Certain keys require programming by a locksmith professional or dealer, while others don't. Make sure you only make use of official Mazda replacements for your key fob.
How to add a spare key
You can add a second key if you don't have a spare key available or if you accidentally damage your current one. You'll need to use a flathead screwdriver, and a new CR2025 battery. Once you've got all the equipment, it is time to open the key fob. Find the auxiliary key release. It's located underneath the metal piece and is easy to find. Once you press the button, the back cover should slide off immediately. Then, you can insert the screwdriver's head into the notch on top or in the space, and pry the metal part off.
After the auxiliary key has been removed, insert your new or spare key into the slot. Set the ignition to ON and wait for five seconds before turning it to off. This will add the new key's information to the system which will allow it to start your vehicle in the future.
It's important to note that you can only program up to three keys for your Mazda 3. The final thing you want is to have more than two functioning key fobs, and not be in a position to get your car started. This is a safety measure that is designed to block unauthorized users, such as valet drivers who are not authorized to use your key and thereby starting your car.
How to reprogram an unrepaired key?
If you have a spare key, it's best to know how to program it if your original key gets stolen or lost. This will stop unauthorised people from starting your vehicle or taking it. This procedure should work with any Mazda however you'll need two keys that work to begin the process of reprogramming. If you don't own two working keys, you'll need take your vehicle to the dealership to get it done.
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 insert the first working key. Then wait five seconds before taking out the key. Repeat the process with the second key.
After you've programmed your new key, you should have three working keys that you can use to start your car in the future. Check each key to make sure that they're functioning properly before throwing them away.
You should think about purchasing a spare Mazda 3 remote, especially in the event that your vehicle is prone to issues. You can purchase one online or at your local automobile store, but make sure to read the reviews prior to purchasing so you can avoid getting a key fob that's not compatible with your vehicle.
How to Change the Battery on a Spare Key
It's a nightmare to discover that your key fob has died, and you are unable to unlock your car. It's easy to replace the battery yourself and save money at the dealer.
Press the auxiliary button on the back of the keyfob. This will release the metal key that is used as an auxiliary key, and expose 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. After the battery is fully exposed, remove the case and place it somewhere that you will not forget it.
Be sure to have an additional battery prior to beginning. These batteries can be purchased at any store that sells batteries or from a Mazda dealer in Winter Garden. Choosing the right battery will ensure that your key fob functions properly.
Next, put the new battery in place and replace the cap of the battery. Be careful not to scratch the small rubber ring the battery is placed on. Then press the two parts of the key fob together until you hear the sound of clicking.
How do I reset the Keyless Entry System
The key fob on your Mazda 3 is not only an added convenience, but it's also an important security feature. If you lose your key, or have it stolen, the car will not start even if it has the spare key fob. The key fob should be reset by the dealer to allow it to work again. This can be an expensive and stressful experience It's a good idea to learn how to reset the system yourself.
Disconnect the battery from the system for 15 minutes. This will eliminate any remaining electrical power in the on-board computer. Then, disconnect the LF-ECU connector and the demand switch connectors. Then, check continuity between the following terminals:
Put the key in the slot, and switch on the ignition. Keep the key in place for about five seconds, then turn it off. The key's information has been 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. mazda key fob battery will prevent unauthorized persons from copying your key and gaining access to your vehicle. You can purchase a replacement key fob on the internet, but you'll need to visit an expert locksmith or dealer to cut it and get it programmed.