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

It's a good idea always to have a spare key on hand in case you lose your keyfob, or it was unable to function. This article will explain how to add, modify or reprogramme the Mazda 3 keyfobs.

A word of caution: some keys require programming by a locksmith professional or dealer, while others don't. Only use official Mazda replacements to replace your key fob.

How do I add an extra key

If you're not fortunate enough to get a spare key from the dealer when you buy your mazda 3 remote key 3 or accidentally break your current one, don't worry -- there's the option of adding another key. You'll need the flathead screwdriver, as well as an CR2025 battery. Once you have the items and tools, you're ready to open the key fob. First look for the auxiliary key release button. It's located under the metal portion and is easy to find. The back cover should come off when you press the button. Next, place the screwdriver's head into the notch or space on the top of the metal part and pull it off.

After the auxiliary keys are removed, insert your new or spare key into the slot. Turn on the ignition and wait for five seconds, then set it to OFF. This will allow the system to recognize the new key and start your vehicle in the future.

It is only possible to program three keys to your Mazda 3. The final thing you want is to have more than two working key fobs, and not be capable of getting your vehicle started. This is a safety precaution designed to prevent unauthorised users, like valet drivers, from activating your key and starting your vehicle.

How do I reprogram a spare key

If you have a spare key it's best to know how to reprogram it in case your original key gets lost or stolen. This will keep unauthorised persons from starting your vehicle or stealing it. This procedure should work with any Mazda however, you'll require two keys that work to begin the reprogramming process. If you don't have the two working keys, you'll need to take your vehicle to a dealership to complete the process.

Begin by stepping into your driver's seat and close the door, with the exception for the one that's already opened. Place the first working key in the slot, then set the ignition to the ON position. Wait five seconds before removing the key. Repeat the process with the second key.

Once you've programmed your new key, you'll have three keys that you can use to start your vehicle in the future. Before storing each key, make sure that it's functioning properly.

You should think about purchasing a spare Mazda 3 remote key 3 remote, especially in the event that your vehicle is prone to problems. You can buy one online or in your local automotive store. Make sure to go through reviews prior to purchasing to ensure that you don't get one that's not compatible with your vehicle.

How do you change the battery on a spare key?

It's depressing to find out that your key fob is dead and you're in a position to not unlock your vehicle. It's not a problem to replace the battery and save some money at the dealer.

The first step is to press the auxiliary key button that is located on the back of the key fob. This will remove the key auxiliary and reveal two slots on the sides of the case. Press the flathead into one of these slots, and gently pry the two halves apart. When the battery is completely exposed, remove it and put it away somewhere that you won't forget about it.

Before you begin, make sure you have a brand new replacement battery. They can be bought at any retailer that sells batteries or from a Mazda dealer in Winter Garden. The correct type of battery is crucial to ensure that your keyfob works properly.

Next, put the new battery in its place and then replace the battery cap. Be careful not to damage the rubber ring that holds the battery. The two halves should be pressed together until you hear a click.

How to reset a Keyless Entry System

The Mazda 3 key fob is not just a practical feature. It's also an important security feature. If you lost your key or had it stolen the car won't start, even if you have the spare fob. This is because the key fob has to be reset at the dealership in order to function properly. This can be a costly and stressful experience and it's a good idea to understand how to reset the system yourself.

Remove the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. The next step is to disconnect the LF-ECU and demand switch connectors. Then, verify the continuity between the following terminals:

Insert the key into the slot and turn the ignition ON. Keep the key in place for about five seconds, then switch off. The key's information is added to the vehicle's computer and the new fob will start your car. You can program up to three fobs, but you must only use one at each time. This will prevent unauthorized people from stealing your key and gaining access to your car. You can purchase a new keyfob online, however it will still need to be cut and programmed by an authorized dealer.