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

If you've dropped your key fob on the floor or it stopped working, it's always best to have an extra key in your pocket. This article will explain everything you should be aware of the process of adding, changing, and changing the programming of your Mazda 3 key fobs.

Be aware that some keys require programming by an experienced locksmith, whereas others don't. Be sure to 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, or in the event that you break your existing one. To do this, you'll need an incredibly small screwdriver, a flathead screwdriver, and the new CR2025 batteries. Once you have the items and tools, you're ready to open the key fob. First look for the key release button for the auxiliary key. It's located underneath the metal part and is easy to locate. Once you press the button, the back cover should slide off immediately. Then, insert the screwdriver's tip into the notch on top or the space and pull the metal piece off.

Insert your new or spare key into the slot after you have removed the accessory key. Turn on the ignition and then wait for around five seconds before turning it to off. This will allow the system to recognize the new key and begin your vehicle in the future.

It is only possible to program three keys in your Mazda 3. The one thing you don't want is to have more than two working key fobs and not be in a position to get your vehicle started. This is a security measure to stop unauthorized users from activating your keys and launching your vehicle.

How to reprogram a spare key?

It's smart to learn how you can reprogram a spare key in the event that the original key is lost or stolen. This will prevent unauthorized people from opening your car or stealing it. This should work with any mazda replacement keys. You will need two keys that are working to start the reprogramming process. If you don't have two working keys, you'll have to bring your vehicle to the dealership to get it done.

Start by stepping into driver's seat, close all the doors with the exception of the one that is open. Set the ignition to ON and insert the first functioning key. Wait for five seconds, then take the key out and repeat with the second key.

After you've completed programming your new key, you'll have three keys that you can use to start your vehicle in the future. Test each key to be sure that they're operating correctly before placing them away.

It's a good idea buy an extra Mazda 3 key fob, especially if your car is one who is prone to losing keys or has other issues with it. It's possible to find one on the internet or at your local automobile store, but be sure to read the reviews prior to purchasing so you can avoid getting a key fob that's not compatible with your car.

How do you 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 Mazda 3 spare key you're unable to unlock your vehicle. Luckily, it's easy to replace the battery and save some money at the dealer.

Press the auxiliary key button at the back of the keyfob. This will take out the metal key that is used as an auxiliary key, and expose two slots on the sides of the case. Press the flathead into one of these slots, and gently pry the two halves apart. Once the battery is fully exposed, take it out and set aside the case somewhere safe from being lost.

Before you begin, make sure that you have a brand new replacement battery. They can be found at any retailer that sells batteries or at a Mazda dealer near Winter Garden. Using the right type of battery will ensure that your key fob functions properly.

Then, put the new battery in its place and then replace the battery cap. Be careful not to scratch the small rubber ring that the battery sits on. The two halves should be pressed together until you hear the click.

How can I reset the Keyless Entry System

The mazda 3 spare key 3 key fob is not just a convenience. It also serves as an important security feature. If you lose your key, or have it stolen the car will not start, even if you have the spare fob. This is because the key fob has to be reset at the dealership in order to work properly. It can be a stressful and expensive ordeal. Therefore, it's best to know how to reset the system.

To reset the system, remove the battery for mazda 3 spare Key around 15 minutes. This will take out any remaining electricity from the onboard computer. Next, disconnect both the LF-ECU connector and the demand switch connectors. Check for continuity between the terminals.

Place the key in the slot, then switch on the ignition. Switch off the ignition after about five minutes. The key's details will be added to the vehicle's computer and the new fob will be able to start your car in the future. You can program as many fobs as you desire but only one can be used at any particular time. This will keep unauthorised individuals from stealing your keys and getting access to your vehicle. You can buy a new keyfob on the internet, but it'll still need to be programmed and cut by an authorized dealer.