Mazda 3 Key Fob Replacement
There are instances when an Mazda 3 owner might need to change the battery in their key fob. This is a straightforward task that you can do yourself.
To change the battery, find the small button located on the back of the key fob. Press it and then remove the cover.
Lost Keys
Before the 1990s the 1990s, losing your car keys was a minor inconvenience. You could replace them at any hardware store, locksmith, or dealer and it was inexpensive to do it. Today, your automobile's high-tech key fob does more than simply lock and unlock your car and that convenience comes with a cost: more expensive replacements.
mazda 2 battery key comes with a security chip built into it that sends a unique code to the car's computer in order to let you unlock and start the engine. The key fob can also be used to control other features, like opening your windows in the hottest parking space and requesting that the car come to you, allowing you to reverse in tight spaces (a feature that is available on certain Genesis GV60 sedans and Hyundai Sonata sedans).
Fortunately, Mazda's remotes aren't nearly as expensive as those from other automakers. You can even replace the battery of your key fob yourself with a little bit of know-how. To do this, you'll need a small screwdriver with a flat head, a new CR2025 battery and your key fob. Use the red and directional buttons to lock and unlock your doors prior to changing the batteries.
If you want to save money on the cost of a Mazda 3 key fob replacement you can find one online that is OEM and does not require programming by a dealer or locksmith. You'll find many options on eBay however they may not be the same color or logo as your current key fob.
Lockouts
One of the worst things that can happen to a driver is becoming locked out of their vehicle. There are a few tricks drivers can use to gain access inside their vehicle. It is best to first call their local Mazda dealership or locksmith. This is a good option because it will probably be less expensive than calling for a tow truck and will be quicker as well. The dealer or locksmith will need to buy a key code from the database in order to cut you the new key fob which will usually cost around $100. This is why it's important to save this code in a safe place.
If you're stuck in the vehicle, another thing people can do is look for an auxiliary button on the bottom. The button is typically smaller and round, but can be pressed. This will open the doors of the vehicle and permit the owner to open them by hand.
The emergency override feature is a second method to gain access an automobile that is locked. This will allow you to use your key fob override any functions that have been disabled by the theft deterrent system. This usually triggers the hazard warning lights and beep sounds to confirm that the doors, fuel-filler lid or liftgate have been shut.
Transponder Chips
If your key fob has an embedded transponder chip in the head of the metal L-shaped key, then you'll need to go to an authorized locksmith or dealer to replace it. These chips are equipped with an unique identification number which is used to open your vehicle.
When you insert your key and turn it to ON, the antenna ring emits an explosion of radio frequency energy that reaches the transponder chip in the key's metal. The chip responds by sending an encryption code to the ring. This tells the car that the key is legitimate.
The majority of Mazdas have a transponder chip with an evolving code that changes every time you turn it. This means that the key you're using won't work on your vehicle until you have a second copy using the same code in the ignition cylinder.
Fortunately, it's not impossible to create your own replacement keys. If you're able to find an operational key, put it into your Mazda and turn the ignition to ON. If the key starts your vehicle, you can copy the data from it onto the working key. If needed, you may also use the eraser of your key fob in order to erase the code. This method isn't guaranteed to be effective because some transponder chips can fail to function properly.
Programming
The loss of your car keys can be an expensive and time-consuming ordeal. Mazda has made adding and programming a third car key a breeze. This can be done in a couple of steps and you won't need to pay an agent for this service. If you have a spare car key, this is the most efficient way to avoid paying for towing charges and dealer charges.
First, you'll need to purchase a new battery for the key fob. You can purchase one at the hardware store or at a big box retailers for around $10. To open the fob, you'll require an screwdriver with a flat head. The screwdriver's head must fit into an opening on the back of your fob. After you've removed your case you'll have to replace the battery that was in the case with the new one.
Now it's time to set up the new key fob in your vehicle. To do this, put the first working key into the ignition and then turn it ON. For about five seconds, you should wait before turning the ignition off. Repeat the process with a second working key, then your new (or spare) key. After this is done your newly programmed key should be in a position to start your Mazda. If not, it could be a problem with the key fob.