Mazda 3 Key Fob Replacement

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

To replace the battery, press the small button located on the back of the key fob. Press the button to remove the cover.

Lost Keys

Losing your car keys was a minor inconvenience. It was comparatively inexpensive to replace them in any hardware store, dealer, or locksmith. Today, your automobile's high-tech key fob is capable of doing more than simply lock and unlock your car, and that added convenience comes with a price higher cost for replacements.

The key fob has an electronic security chip that sends an individual code to the computer in the car that allows it to unlock and start it. The key fob is capable of controlling various other features, such as rolling down the windows if you're in a hot spot and summoning your car to make it easier to reverse into a tight spot (a feature found on some Genesis GV60 and Hyundai Sonata sedans).

Fortunately, Mazda Replacement keys's remotes aren't nearly as expensive as those from other automakers. With a little knowledge you can swap out the key fob's battery yourself. You'll require a flathead screwdriver along with the new CR2025 to accomplish this. Make sure to use the directional buttons along with the red button to unlock and lock the doors before changing the battery.

If you want to save money on the cost of a Mazda 3 key fob replacement find one on eBay that is OEM and doesn't require programming by a locksmith or dealer. You'll find plenty of options on eBay but they might not have the same logo or color as the one you have currently.

Lockouts

A driver who is locked out of their vehicle is among the worst things to occur. There are some tricks that drivers can use to gain access into their vehicle. You should first contact their local Mazda dealership or locksmith. This is a viable option as it's likely be less expensive and more efficient than calling a tow-truck. A dealer or locksmith must purchase a key code from the database to be able to create a brand new fob. The cost is around $100. It's important to keep this code safe.

Another thing that people could do if stuck outside of their car is to check the underside of the key fob to locate an additional button. The button is usually tiny and round. It can be press. This will open the vehicle's doors and allow the driver to open them manually.

Another way to get into an unlocked vehicle is using the emergency override feature. This allows the key fob to take over functions that are not controlled by the theft-deterrent system. This will activate the hazards lights and sound to verify that the doors, lids for the fuel filler, or liftgate is closed.

Transponder Chips

If your key fob has an embedded transponder chip in the head of the L-shaped key, then you'll need to visit a locksmith or dealer in order to have it replaced. The chips have an unique identification number that is used by your car to start the engine.

The antenna ring emits a burst radio frequency energy when you insert your metal key and turn it on. The energy is then absorbed by the chip transponder in the key. The chip responds by sending a code to the antenna ring. This tells the car that the key is legitimate.

Most Mazdas are equipped with a transponder chip that is rolling code that changes its code every time you turn the key. This means that your key will not function with 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 operational key, put it inside your mazda key fob and set the ignition to ON. If the key is able to start your vehicle, you can copy the information from it to the other working key. You can also try the eraser process on your key fob to erase the current code, if needed. It's important to keep in mind that this method isn't 100% guaranteed to work, since some transponder chips from recycled systems might not be able to respond properly.

Programming

Losing your car keys can be costly and time-consuming. Luckily, Mazda has made it easy to program and add a third key. This can be done in a few easy steps, and you don't need to pay a dealer for this service. You will not have to pay for towing charges or dealership fees if you have an additional car key.

In the beginning, you'll need find a replacement battery to the fob. You can buy one at a big box retailer or hardware store for around $10. To open the fob, you'll need a flathead screwscrew. The screwdriver's tip should fit into tiny slots on the side of the fob. After removing the case, replace the old battery.

Now it's time to set up the new key fob into your vehicle. Insert the first key that operates into the ignition and turn it ON. It should be on for Mazda replacement keys about five seconds then switch it off. Repeat the process using a second key that works with the new (or additional) key. After you've completed this then your Mazda should now be able to be initiated using the newly-programmed keys. If it's not, there may be another problem with the key fob or the vehicle.