Mazda 3 Key Fob Replacement

There are occasions when a Mazda 3 owner might need to change the battery on their key fob. You can do this task yourself.

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

Lost Keys

Prior to the 1990s the 1990s, losing your car keys was an annoyance that was not a major inconvenience. It was relatively inexpensive to replace them at any hardware store, dealer, or mazda 3 key Fob locksmith. Your car's top-of-the-line key fob does more than just lock and start your car. But that convenience comes at costs - more expensive replacements.

The key fob contains security chips that transmit an individual code to the computer in the car to unlock and start it. The key fob is also capable of controlling some other functions, such as rolling down the windows if you're in a hot spot and summoning your car to allow you to turn around in an awkward spot (a feature available on some Genesis GV60 and Hyundai Sonata sedans).

Luckily, Mazda's remote fobs aren't as costly as those from other automakers. You can even replace the key fob battery yourself with a little knowledge. To do this, you'll need a small screwdriver with a flat head, a new CR2025 battery and your key fob. Make sure to use the directional buttons as well as the red button to unlock and lock the doors prior to changing the battery.

If you want to save money on a Mazda 3 key fob replacement search for one on the internet that is OEM and does not require programming by a dealer or locksmith. eBay offers a variety of options, however, they may not be the same color as your existing key fob.

Lockouts

One of the worst things that can happen to a driver can be getting locked out of their car. There are a few tricks drivers can employ to gain entry into their car. First, they should consider calling their local locksmith or Mazda dealership. This is a great option as it's likely be cheaper and faster than calling a tow truck. The locksmith or mazda 3 Key fob dealer will need to buy a key code from the database in order to create a new key fob which usually costs about $100. This is why it's important to keep the code in a safe place.

The other thing that people can do when stuck outside of their car is to look at the underside of the key fob in search of an additional button. The button is typically smaller and round, but can be pressed. This will unlock the doors of the vehicle, allowing the driver to open them by hand.

The emergency override function is another method to gain access the car that is locked. This allows you to use the key fob to disable any functions that have been suspended by the theft deterrent system. This will trigger the hazard lights and sound to prove that the doors, lids for the fuel filler, or liftgate is closed.

Transponder Chips

If your key fob is equipped with a transponder chip embedded in the head of the metal L-shaped key, then you'll need a locksmith or dealer to get it replaced. These chips have a unique identification number that works with your vehicle to turn on the engine.

The antenna ring emits a blast of radio frequency energy when you insert your key in the metal and turn it on. The energy is then absorbed by the chip transponder in the key. The chip responds by sending an encryption code to the ring. This informs the car that the key is in good condition.

Most Mazdas utilize an electronic transponder chip that alters its code each time you turn the key. This means that the key you're using will not work with your car until you've got a duplicate with the exact code inside the ignition cylinder.

It's possible to make your own replacement keys. If you're able to find a working key, place it in your mazda replacement keys and turn the ignition to ON. You can copy the information from the key to another key, if it starts your Mazda. If necessary, you can also make use of the eraser on your key fob in order to erase the code. This method is not guaranteed to be effective, as some transponder chips that are recycled might not work properly.

Programming

Losing your car key can be expensive and time-consuming. Mazda has made programming and adding a third car key easy. You can do this with only a few steps and you will not need to pay the dealer for the service. If you have a spare car keys, this is the best way to avoid having to pay for towing charges and dealer fees.

First, you'll need get a replacement battery for the fob. You can buy one at a hardware store or big box retailer for around $10. You'll also need a flathead screwdriver in order to open the fob. The screwdriver's tip should fit inside a tiny slot or space on the side of the fob. After you've removed your case and battery, you'll need to replace the battery that was in the case with the new one.

It's time to add the new key fob into your vehicle. To do this, put the first working key into the ignition and then turn it on. Wait for about five seconds before turning the ignition off. Repeat the process with a second key that works, and then your new (or additional) key. After you've done this, your Mazda should now be able to be initiated using the newly-programmed keys. If not, it may be a problem with the key fob.