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

It's a good idea always to have an extra key in your pocket in case you lose your keyfob or it was unable to function. This article will show you how to add, modify or reprogramme your Mazda 3 keyfobs.

Certain keys require programming from an expert locksmith, while others do not. Make sure to use official Mazda replacements for your key fob.

How to Add a Spare Key

You can add another key in the event that you don't have a spare key available or if you accidentally break your current one. You'll need to use a flathead screwdriver and a new CR2025 battery. Once you've got these tools you can open up the key fob and swap the battery. First look for the button that allows you to release the key. It's located underneath the metal part and is easy to find. Once you press the button, the cover will fall off instantly. Then, place the screwdriver head into the notch at the top or in the space, and remove the metal part.

Insert your spare key or a new one into the slot after taking out the auxiliary key. Turn on the ignition and wait for about five seconds before turning it to OFF. This will register the new key's information to the system that will allow it to start your vehicle in the future.

It is only possible to program three keys on your Mazda 3. You don't want to have to utilize more than two keys to start your vehicle. This is a security measure designed to prevent unauthorised users, like valet drivers from activating your key and starting your car.

How do you reprogram an unrepaired key?

If you have a spare key it's important to know how to reprogram it in the event that your original key is stolen or lost. This will stop unauthorised people from starting your vehicle or taking it. This should work with any mazda 5 key fob. You'll need two keys that are functioning to begin the reprogramming. If you don't own two keys that function then it's best to bring 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. Place the working key into the slot, and then turn the ignition to the ON position. After five seconds, remove the key. Repeat with the second key.

Once you've programmed your new key, you should have three keys that you can use to start your vehicle in the future. Test each key to make sure that they're working properly before placing them away.

It is advisable to purchase a spare mazda key fobs 3 remote, especially in the event that your vehicle is prone to issues. You can purchase one on the internet or at your local auto store. Make sure to read reviews before purchasing to ensure that you don't get one that's not compatible with your vehicle.

How to change the battery with a spare key?

It's awful to discover that your key fob has failed and you're not able to unlock your car. It's easy to change the battery yourself and save money at the dealership.

Press the auxiliary key button on the back of the keyfob. This will release the key from the metal and reveal two slots on the opposite side of the case. The flathead should be inserted into one of these slots and then gently push the two halves of the case apart. After the battery is fully exposed, take it out of the case and place it somewhere you will not forget about it.

Before you start, make sure you have a new replacement battery. These batteries can be purchased at any retailer that sells batteries or from a Mazda 2 key fob replacement dealer in Winter Garden. Using the correct type of battery will ensure that your key fob is working correctly.

Next, put the new battery into place and replace the battery cap. Be careful not to scratch the rubber ring that holds the battery. Then press the two halves of the key fob together until you hear a click.

How do I reset the system's Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It also serves as a security measure. The car won't start if the key is lost or stolen even if you have a spare fob. This is because the key fob has to be reprogrammed at the dealership to function properly. It's a difficult and costly ordeal. Therefore, it's recommended to know how to reset the system.

To reset the system, disconnect the battery for approximately 15 minutes. This will eliminate any remaining electrical current from the computer on board. Then, disconnect the LF ECU and demand switch connectors. Verify that the connections are in good order between the terminals.

Place the key into the slot, and switch the ignition on. The key should remain in the ignition for around five seconds, and then turn it off. The key information is now transferred to the computer of your vehicle and the new fob can start your car. You can program as many fobs as you desire however only one must be in use at any certain time. This will stop unauthorised people from copying your key and gaining access to your vehicle. You can purchase a new key fob online, however you'll still need to visit a dealer or locksmith to cut it and programmed.