Mazda 3 Key Fob Replacement
There are instances 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 on the back of your key fob. Press it, then take off the cover.
Lost Keys
Before the 1990s the 1990s, losing your car keys was an annoyance that was not a major inconvenience. You could replace them at any hardware store, locksmith, or dealer and it was affordable to do this. Your car's top-of-the-line key fob can do much more than lock and unlock the car. But that convenience comes at costs - more expensive replacements.
The key fob is equipped with a security chip built into it that sends a specific code that is sent to the car's computers to allow you to unlock and start the engine. The key fob is also capable of controlling other features, such as rolling down the windows if you're in a hot parking lot and summoning your car for easier reverse maneuvers into a tight spot (a feature available on some Genesis GV60 and Hyundai Sonata sedans).
Luckily, Mazda's remote fobs aren't nearly as expensive as those from other automakers. You can even replace the battery of your key fob by yourself with a little amount of knowledge. To do this, you'll need a small screwdriver with a flat head, a brand new CR2025 battery, and your key fob. Use how to open a mazda 3 key fob and directional buttons to lock and unlock your doors prior to changing the batteries.
If you want to save money on a Mazda 3 key fob replacement you can find one online that is OEM and does not require programming by a locksmith or dealer. There are a variety of options available on eBay but they might not be the same design or color as the one you have currently.
Lockouts
One of the most horrible things that can happen to a driver is being locked out of their car. There are some tricks that drivers can employ to get into their car. The first step is calling the local locksmith or Mazda dealership. This is a good idea as it is likely to be cheaper than calling a tow truck and will be quicker as well. The dealer or locksmith will require a key code from the database to create an additional key fob, which typically costs around $100. This is why it's crucial to keep the code in a secure place.
If you're stuck outside your car, the second thing people can do is look for an auxiliary key located under the car's underside. There is typically small, round button that can be press and held. This will unlock the vehicle's doors and allow the driver to open them by hand.
Another way to get into a locked vehicle is by using the emergency override feature. This will allow you to use your key fob to bypass any functions that were suspended by the theft deterrent system. This is usually the case. hazards warning lights and make a sounds to confirm that the doors, lids for fuel-filler, or liftgate are closed.
Transponder Chips
If your key fob contains the chip for transpondering built into the head of the L-shaped metal key, you'll need a locksmith or dealer in order to get it replaced. These chips are equipped with an unique identification number that is used to start your vehicle.
When you insert your key and then turn it to ON, the antenna ring sends out the radio frequency energy that reaches the transponder chip in the metal key. The chip responds with an encoded code that is transmitted to the antenna ring telling the car that it's an authentic key.
Most Mazdas use an electronic transponder chip which changes its code each time you turn the key. This means that your key won't work with your vehicle until you have a copy that has the exact same code in the ignition.
It's not too difficult to create your own replacement key. If you're able to locate a working key, place it in your Mazda and turn the ignition to ON. You can copy the information from the key to the second key in case it starts your Mazda. You could also try the eraser function on your key fob to remove the current code, if required. It is important to note that this method isn't guarantee that it will work, as some recycled transponder chips might not work correctly.
Programming
Losing your car keys is an expensive and time-consuming ordeal. Mazda has made adding and programming an additional car key simple. You can do this with just a few steps and you don't need to pay the dealer for the service. If you have a spare car key, this is the best method to avoid having to pay for towing and dealer fees.
First, you'll need to purchase an additional battery for the key fob. One can be purchased at a big box store or at a hardware store for approximately $10. You'll also need an flathead screwdriver to unlock the fob. The screwdriver's head should fit into small slots on the back of your fob. After removing the case, replace the battery that was in it.
Now you can program your new key fob. Insert the first key that is working into the ignition and turn it ON. It should be on for about five seconds and then switch off the ignition. Repeat the process with another key that works as well, and then the new (or additional) key. Once you've completed the procedure the Mazda should have the ability to be started using the newly programmed keys. If it does not, there may be another problem with your key fob or vehicle.