How to Add, Change, and Reprogram a Mazda 3 Spare Key
It’s a good idea always to have a spare key on hand regardless of whether you lost your keyfob, or it stopped working. This article will tell you how to add, modify or reprogramme your Mazda 3 keyfobs.
A word of caution Certain keys need to be programmed by a locksmith professional or dealer, whereas others don’t. Only use official Mazda replacements to replace your key fob.
How do I add an additional key
If you’re not lucky enough to find a spare key from the dealership when you buy your Mazda 3 or accidentally break your current key but don’t worry, there’s still a way to add another key. You’ll need to use an flat-head screwdriver and a CR2025 new battery. Once you have these items you can remove the key fob and change the battery. First find the button that allows you to release the key. It’s located under the metal part and is easy to find. The back cover should come off the moment you press the button. Next, insert the head of the screwdriver into the notch, or the spacing at the top of the metal piece and then pull it off.
Insert the spare or new key into the slot after taking out the secondary key. Switch the ignition on and then wait for around 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.
You can only program three keys to your Mazda 3. The one thing you don’t want is to have more than two working key fobs and not being able to get your car started. This is a security precaution designed to prevent unauthorized users, like valet drivers, from activating your key and starting your vehicle.
How to Reprogram a Spare Key
It’s a smart idea to learn how you can reprogram a spare key in the event that the original key is lost or stolen. This will stop unauthorized persons from getting into your car and causing damage to it. This will work with any mazda extra key. You will require two keys that are functioning to begin the reprogramming process. If you don’t own two keys that function, it’s best to take your Mazda to a dealer to have this done.
Start by getting into the driver’s position, and shutting all 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. Then wait five seconds before taking out the key. Repeat the process with the second key.
Once you’ve programmed your new key, you should have three working keys that you can use to start your car in the future. Test each key to be sure that they’re operating correctly before putting them away.
It’s a good idea to buy a spare Mazda 3 key fob, particularly if you’re a driver who has a tendency to lose their keys or has other issues with it. You can purchase one online or at a local automotive store, but be sure to read reviews before purchasing so that you aren’t buying an item that isn’t compatible with your car.
How do you change the battery on a spare key?
There’s nothing more frustrating than finding that the battery for your key fob has failed and you are unable to unlock your vehicle. It’s easy to replace the battery yourself and save money at the dealership.
The first step is to press the auxiliary key button on the back of the key fob. This will release the key from the metal and reveal two slots on the opposite side of the case. Insert the flathead screwdriver into one of these slots and then gently pry apart the two sides of the case. Once the battery is fully exposed, remove the case and place it in a place where you won’t forget it.
Before you begin, be sure that you have a new replacement battery. They can be found at any store that stocks batteries or at a Mazda dealer close to Winter Garden. Choosing the correct battery will ensure that your key fob functions properly.
Then, put the new battery in the correct place and replace the cap on the battery. Be careful not to damage the small rubber ring the battery is placed on. Then, press the two parts of the key fob until you hear a click.
How to Reset a Keyless Entry System
The Mazda 3 key fob is not just a convenience. It’s also a security feature. If you lose your key or have it stolen, the car will not start even if you have the spare key fob. The key fob needs to be reprogrammed by the dealer to allow it to work again. This can be a costly and time-consuming process and it’s a good idea to learn how to reset the system yourself.
To reset the system, unplug the battery for 15 minutes. This will take out any remaining electricity from the onboard computer. Then, disconnect the LF ECU and demand switch connectors. Verify that the connections are in good order between the terminals.
To program a new key, or a spare, insert it into the slot and set the ignition to ON. Keep the key in place for around five seconds and then switch off. The key’s details will be saved to your car’s computer, and the new fob will be able start your car in the future. You can program as many fobs as need but only one can be used at any particular time. This will prevent unauthorized persons from copying the key and getting ahold of your car. You can purchase a brand new key fob online, but you’ll need to visit an authorized locksmith or dealer to cut it and programmed.