Mazda 3 Key Fob Replacement

There are occasions when a Mazda 3 owner might need to change the battery in their key fob. This is a simple job that you can accomplish yourself.

Find the small button at the back of your key fob. Press the button, then remove the cover.

Lost Keys

Losing your car keys was an issue of minor importance. It was comparatively inexpensive to replace them at any hardware store, dealer, or locksmith. Today, your car's high-tech key fob does much more than lock and start your car and that convenience comes with a price and that's more expensive replacements.

The key fob comes with a security chip embedded in it that sends a unique code to the car's computer to let you unlock and start the engine. The key fob can also be used to control other features, like the windows being rolled down in a hot parking area and requesting the car to come to you so you can reverse out of a tight spot (a feature available on some Genesis GV60 sedans and Hyundai Sonata sedans).

Luckily, Mazda's remote fobs aren't nearly as expensive as those from other automakers. You can even replace the key fob battery by yourself with a little bit of knowledge. You'll require a flathead screwdriver along with the new CR2025 to do this. Make sure to use the directional buttons and red button to unlock and lock the doors prior to changing the battery.

If you're looking for a way to save money, find an Mazda 3 keyfob online that is OEM. It doesn't require programming by a locksmith or dealer. eBay has many options, but they may not be the same color as your existing key fob.

Lockouts

One of the most devastating things that can happen to a driver is being locked out of their car. Luckily, there are few tricks that drivers can use to get back into their car. It is best to first call their local Mazda dealership or locksmith. This is a good option as it is likely to be cheaper than calling a truck, and it's faster as well. The locksmith or dealer will need to buy a key code from the database to cut you a new key fob which is usually about $100. This is why it's important to save the key code in a safe location.

The other thing that people can do when they are stuck outside of their vehicle is to look at the underneath of the key fob for an additional button. There is usually small, round button that can be hit and held. This will open the doors of the vehicle, allowing the driver to open them manually.

Another way to get into the vehicle locked is by using the emergency override feature. This will allow you to use the key fob to bypass any functions that are suspended by the theft deterrent system. This will trigger the hazards lights and sound to verify that the doors, lids for the fuel filler or liftgate are closed.

Transponder Chips

If your key fob contains an embedded transponder chip in the head of the L-shaped key, you'll need a locksmith or dealer in order to get it replaced. These chips come with a unique identification number that is used by your vehicle to start the engine.

When you insert your key and then turn it to the ON position the antenna ring releases a burst of radio frequency energy that gets to the transponder chip that's in the metal key. The chip responds by sending an encoded message to the antenna ring. This tells the car that the key is legitimate.

Most Mazdas use a transponder chip that is rolling code that alters its code each time you turn the key. This means that your key will not work with your vehicle until you have a copy with the exact code in the ignition.

It's not difficult to create your own replacement mazda key key. If you're able to find a working key, place it into your Mazda and set the ignition to ON. If the key is able to start your car, you'll then be able to copy the data from it onto the other key. If necessary, you can also use the eraser of your key fob to remove the code. It's important to note that this method isn't guarantee that it will work, as certain transponder chips that have been recycled might not work correctly.

Programming

Losing your car keys is an expensive and time-consuming experience. Mazda has made programming and adding the third car key simple. This can be accomplished in a few easy steps, and you won't need to pay a dealer for this service. You can avoid paying for towing or dealer fees if you have an additional car key.

In the beginning, you'll need purchase a replacement battery for the fob. You can buy one at a big box retailer or at a hardware store for approximately $10. You'll also need a flathead screwdriver to open the fob. The screwdriver's head must fit in a small slot or a space on the side of the fob. After removing the case replace the old battery.

Now you can program your new key fob. Insert the first key that works into the ignition and turn it ON. For about five seconds, you should wait and then turn the ignition off. Repeat the process with a second working key, and then your new (or spare) key. Once you've done this and the key that you have programmed should be in a position to start your mazda 2 key fob replacement. If it's not it could be due to a issue with the key fob or the vehicle.