Where Will Mazda 6 Key Be 1 Year From This Year? How to Add, Change, and Reprogram a Mazda 3 Spare Key

It's a good idea to keep a spare key on hand, whether you dropped your keyfob, or it was unable to function. This article will provide everything you must learn about the process of adding, changing, and reprogramming your Mazda 3 key fobs.

A word of caution Certain keys need to be programmed by a locksmith professional or dealer, while other keys do not. Make sure you only use genuine Mazda replacements for your key fob.

How do I add an extra key

You can also add an additional key if you don't have a spare key available or in the event that you break the one you already have. You'll need to use a flathead screwdriver and an CR2025 battery. Once you've got the tools then it's time to open the key fob. First look for the key release button for the auxiliary key. The button is beneath the metal part. It's easy to find. Once you hit the button, the back cover should slide off immediately. Next, place the head of the screwdriver into the notch or the space at the top of the metal part and pry it off.

Insert your spare or new key into the slot after you have removed the accessory key. Turn on the ignition and then wait for around five seconds, then turn 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 into your Mazda 3. The one thing you don't want is to have more than two working key fobs, and not be capable of getting your vehicle started. This is a safety measure designed to stop unauthorized users, such as valet drivers, from activating your key and starting your car.

How do I reprogram an unrepaired key?

It's a good idea to know how to reprogram an extra key in the event that your original key gets lost or stolen. This will stop unauthorized persons from starting your vehicle or taking it. This will work with any Mazda. You'll need two keys that are working for the reprogramming to begin. If you don't own two working keys, you'll need to take your vehicle to a dealership to have it done.

Begin by getting into your driver's seat, and shutting the door, excluding for the one that's opened. Set the ignition to ON and then insert the first working key. After five seconds, take the key out and repeat the process with a second working key.

Once you've finished programming your new key, you'll have three working keys that you can use to start your car in the future. Before placing each key in storage, make sure that it's functioning properly.


It is advisable to purchase an extra Mazda 3 remote, especially in cases where your car is prone to problems. You can buy one online or at your local automobile store, but be sure to read the reviews before purchasing so that you aren't buying an item that isn't compatible with your vehicle.

How to change the Battery on a Spare Key

It's a nightmare to discover that your key fob is dead and you're locked out of your car. It's not a problem to replace the battery and save some money at the dealership.

The first step is to press the auxiliary button on the back of the key fob. This will remove the key auxiliary and reveal a slot on both sides of the case. Insert the flathead screwdriver into one of these slots. Then, gently pry apart the two sides of the case. Once the battery is fully exposed, take it out and place the case somewhere you won't forget it.

Before you start, make sure that you have a brand new replacement battery. You can find these at any store that sells batteries or at a Mazda dealer near Winter Garden. Using the right type of battery will ensure that your key fob functions correctly.

Replace the cap on the battery and then put in the new battery. Be careful not to scratch the small rubber ring that the battery is placed on. Finally press the two halves of the key fob together until you hear the sound of a click.

How to Reset a Keyless Entry System

The Mazda 3 key fob is not just a convenience. It's also a security measure. If you lose your key or had it stolen the car won't start even if it has the spare fob. This is because the key fob has to be reprogrammed by the dealership to work once more. It's a difficult and costly experience. So, it's best to know how to reset the system.

To reset the system, disconnect the battery for approximately 15 minutes. This will eliminate any residual electric current from the onboard computer. Next, disconnect the LF-ECU and demand switch connectors. Then, verify the continuity between the following terminals:

Place the key into the slot, and turn the ignition ON. Stop the ignition after about five seconds. The key information will now be transferred to your vehicle's computer and the new fob will be able to start your vehicle in the future. mazda 5 key replacement can program as many fobs as want, but only one should be used at any certain time. This will prevent unauthorized persons from copying the key and getting ahold of your car. You can purchase a new keyfob online, but it must be programmed and cut by an authorized dealer.