Mazda 3 Key Fob Replacement

There are occasions when an Mazda 3 owner might need to change the battery in their key fob. It is easy to complete this task yourself.

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

Lost Keys

Prior to the 1990s, losing your car keys was an annoyance that was not a major inconvenience. It was relatively inexpensive to replace them in any hardware store, dealer or locksmith. Today, your car's advanced key fob can do more than lock and start your car and that convenience comes at a cost that is more expensive replacements.

The key fob features a security chip embedded in it that sends a specific code that is sent to the car's computers to let you unlock and start the engine. The key fob is also capable of controlling other functions, such as opening the windows when you're in a hot spot and summoning your car to you to allow you to turn around in an area that is tight (a feature offered on some Genesis GV60 and Hyundai Sonata sedans).

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

If you're looking to save money you can find a Mazda 3 keyfob online that is OEM. It doesn't need programming by a locksmith or dealer. You can find a wide selection on eBay but they might not have the same logo or color that your current key fob.

Lockouts

One of the most horrible things that can happen to a driver is becoming locked out of their vehicle. There are some tricks that drivers can employ to get into their vehicle. You should first contact their local mazda key replacement dealership or locksmith. This is a good option because it's less expensive than calling a tow truck and will be quicker too. The locksmith or dealer will need to buy a key code from the database in order to create a new key fob, which is usually about $100. This is why it's important to save the code in a safe place.

The other thing that people can do when stuck outside of their car is to look on the underneath of the key fob to find an auxiliary button. The button is usually tiny and round. It can be activated. This will open the doors to the vehicle and allow the driver to open them manually.

Another way to gain entry into a locked vehicle is by using the emergency override feature. This will allow you to use your key fob to override functions that have been suspended by the theft deterrent system. This usually triggers the warning lights for hazard and sound signalling that the doors, fuel-filler lid or liftgate are locked.

Transponder Chips

You'll need to replace it if your key fob has a transponder embedded in the head of the metal L-shaped key. These chips contain an unique identification number that is used to start your car.

The antenna ring emits radio frequency energy when you insert your metal key and turn it on. The energy is then absorbed by the chip's transponder located in the key. The chip responds by sending an encrypted message to the antenna ring. This tells the car that the key is legitimate.

Most Mazdas come with a transponder chip with a rolling code that changes each time you turn it. This means that the key won't work with your vehicle until you have a second copy with the exact code in the ignition.

It's not difficult to make your own replacement key. If you find an original key that works and fits into your Mazda. Then turn the ignition ON. If the key is able to start your car, you'll then be able to copy the information from it to the other working key. If needed, you may also utilize the eraser on your key fob to remove the code. It is important to remember that this method isn't guarantee that it will work, as some recycled transponder chips might not function correctly.

Programming

Losing your car key is costly and time-consuming. Mazda has made programming and adding an additional car key simple. It is possible to do this in just a few steps and you don't need to pay the dealer for the service. You can avoid paying for a tow or dealership fees if there is an additional car key.

You'll need to buy a new battery for the key fob. One can be purchased at a big box retailer or at a hardware store for approximately $10. To open the fob, you'll require a flathead screwscrew. The screwdriver's head must fit into small slots on the side of your fob. After removing the case replace the old battery.

It's time to add the new key fob to your vehicle. Insert the initial key that works into the ignition and turn it ON. Wait for about five seconds before turning the ignition off. Repeat the process using a second key that works with the new (or extra) key. After you've done this the Mazda should be able to be started with the newly programmed keys. If it's not, there could be a problem the key fob.