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

Whether you dropped your key fob on the floor or it simply stopped working, it's always recommended to keep a spare key on hand. This article will provide everything you must learn about changing, adding, and changing the programming of your Mazda 3 key fobs.

Be aware that some keys require programming by a professional locksmith, while others don't. Make sure you use only genuine Mazda replacements to replace your key fob.

How do I add an additional key

If you're not fortunate enough to find a spare key from the dealer when you buy your Mazda 3 or accidentally break the one you have, don't worry -- there's still an option to get another key. To accomplish this, you'll require a small screwdriver with a flat head and the new CR2025 batteries. Once you've got these tools you can remove the key fob to change the battery. First look for the key release button for the auxiliary key. It's located under the metal portion and is easy to locate. When you hit the button, the back cover should slide off immediately. Next, insert the head of the screwdriver into the notch or the space at the top of the metal part and then pull it off.

After the auxiliary key has been removed, insert your new or spare key into the slot. Switch the ignition on and wait for about five seconds, then turn it to off. This will register the new key's details to the system which will allow it to start your vehicle in the future.

It is only possible to program three keys into your Mazda 3. The one thing you don't want is to have more than two functioning key fobs but not be able to get your car started. This is a safety measure to stop anyone who is not authorized from activating your keys and launching your vehicle.

How to reprogram an unrepaired key?

If you have a spare key, it's a good idea to be aware of how to reprogram it in the event that your original key gets stolen or lost. This will stop unauthorised people from abusing your vehicle and re-starting it. This will work with any Mazda. You'll require two keys that work to begin the reprogramming process. If you don't have the two working keys, you'll have to bring your vehicle to the dealership to have it done.

Start by getting into the driver's position and close all the doors with the exception of the one that is open. Place the first working key into the slot, and then turn the ignition to the ON position. Wait five seconds, then remove the key and repeat the process with the second working 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 make sure that they're working properly before taking them off.

It's a good idea to buy a spare Mazda 3 key fob, particularly if you're a driver who frequently loses their key or has other issues with it. You can purchase one online or at your local automobile retailer, but make sure to read reviews prior to purchasing so you can avoid purchasing an item that isn't compatible with your vehicle.

How to Change the Battery on a Spare Key

There's nothing more frustrating than discovering that the battery for your key fob has been damaged and you're unable to unlock your vehicle. It's not a problem to replace the battery and save yourself some money at the dealership.

Press the auxiliary key button located at the back of the keyfob. This will take out the key's metal cover and reveal two slots on the opposite side of the case. Put the flathead screwdriver in one of these slots and gently pry apart the two sides of the case. Once the battery is fully exposed, take it out and set aside the case in a place where you will not forget it.

Be sure to have an extra battery in place prior to starting. They can be found at any store that sells batteries or at an mazda 6 key dealer near Winter Garden. The right type of battery is crucial to ensure that your keyfob works properly.

Replace the cap on the battery, and then insert the new battery. Be careful not damage the rubber ring that holds the battery. The two halves should be pressed together until you hear a click.

How do I reset a Keyless Entry System

The Mazda 3 key fob is not just a convenient feature. It's also a security measure. The car won't start if your key is lost or stolen, even if you've got an extra key fob. The key fob needs to be reprogrammed by the dealer to enable it to function again. It's a difficult and costly process. Therefore, it's best to understand how you can reset the system.

Remove the battery from the system for 15 minutes. This will eliminate any remaining electricity from the onboard computer. Then, disconnect both the LF-ECU connector and the demand switch connectors. Check continuity between the following terminals.

Place the key into the slot and switch on the ignition. The key should remain in the ignition for around five seconds, and then turn it off. The key's information has been transferred to the computer of your vehicle and the new fob is able to start your car. You can program any number of fobs you desire however only one must be used at a certain time. This stops unauthorized individuals from copying the key and gaining access to your vehicle. You can purchase a replacement key fob online, however you'll still need to go to an authorized locksmith or dealer to cut it and get it programmed.