Mazda 3 Key Fob Replacement

There are times when an Mazda 3 owner might need to change the battery on their key fob. This is an easy task that you can accomplish yourself.

To change the battery, look for the small button on the back of the key fob. Press the button to remove the cover.

Lost Keys

Prior to the 1990s lost car keys was an annoyance that was not a major inconvenience. You could replace keys at any hardware store, locksmith, or dealer and it was affordable to do this. Your car's modern key fob is able to do more than simply lock and start your car. However, that added convenience comes with the cost of replacements.

The key fob comes with an embedded security chip in it that sends a unique code to the car's computer to allow you to unlock and start the engine. The key fob is also able to be used to control other features, like rolling down your windows in a hot parking area and summoning the car to you so you can reverse into a tight space (a feature that is available on certain Genesis GV60 sedans and Hyundai Sonata sedans).

Fortunately, Mazda's remotes aren't as expensive as those from other automakers. You can even change the battery in your key fob yourself with a amount of knowledge. You'll require a flathead screwdriver along with the new CR2025 to complete this. Be sure to utilize the directional buttons and red button to unlock and lock the doors before changing the battery.

If you're looking to save money on the cost of a Mazda 3 key fob replacement search for one on the internet that is OEM and doesn't require programming by a locksmith or dealer. You'll find plenty of options on eBay although they may not be the same design or color as your current key fob.

Lockouts

One of the most devastating things that can happen to a driver is getting locked out of their vehicle. Thankfully, there are a few strategies that drivers can utilize to get back into their vehicle. 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 tow truck and will be faster as well. The locksmith or dealer will require a key code from the database in order to create a new key fob, which typically costs about $100. This is the reason it's essential to save the key code in a safe spot.

Another thing that people could do if stuck outside of their vehicle is to check the underside of the key fob to locate an auxiliary button. There is typically small, round button that can be placed and held. This will unlock the vehicle's doors and allow the driver to open them by hand.

The emergency override function is another method of gaining access to a locked car. This allows the key fob to take over the functions that are disabled by the theft-deterrent system. This will trigger the hazard lights and sound to ensure that the doors, lids of the fuel filler or liftgate are shut.

Transponder Chips

You'll have to replace it if your key fob has a transponder that is built into the head of the metal L-shaped key. The chips have an unique identification number that allows your car's engine to start the engine.

The antenna ring emits radio frequency energy when you insert your key made of metal and turn it on. The energy reaches the chip transponder within the key. The chip responds by sending an encoded message to the antenna ring. This informs the car that the key is valid.

The majority of Mazdas are equipped with transponder chips that have a rolling code that changes every time you turn it. This means that your key will not work on your vehicle until you have a copy with the exact same code in the ignition.

It's not too difficult to create your own replacement key. If you're able to locate an actual key, you can insert it in your Mazda and set the ignition to ON. You can copy the data from the key to the other key if it starts your Mazda. You could also try the eraser procedure on your key fob in order to erase the current code, if needed. This method is not certain to be successful since some transponder chips recycled might not function correctly.

Programming

Losing your car keys is an expensive and lengthy process. Mazda has made programming and adding an additional car key simple. This can be done in a couple of steps and you won't have to pay a dealer for this service. If you have a spare car key, this is the best way to avoid paying for towing charges and dealer charges.

You'll first need to purchase new batteries for the key fob. You can purchase one from the hardware store or at a big box retailers for around $10. You'll also need a flathead screwdriver in order to open the fob. The screwdriver head should fit into small slots on the back of your fob. After taking the case off, replace the old battery.

Now it's time to set up the new key fob to your vehicle. Insert the initial key that works into the ignition and turn it on. For about five seconds, and then turn off the ignition. Repeat the process with a second working key, then your new (or spare) key. Once you've completed the procedure, your Mazda should now be able to be started using the newly programmed keys. If not it could be due to a issue with your key fob or vehicle.