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 simple job that you can do yourself.
To change the battery, locate the small button on the back of the key fob. Press the button to remove the cover.
Lost Keys
Prior to the 1990s losing your car keys was an annoyance that was not a major inconvenience. You could replace keys at any hardware store, locksmith shop, or dealer, and it was fairly affordable to do so. Your car's top-of-the-line key fob is able to do more than just lock and unlock the car. However, that convenience comes at the cost of replacements.
The key fob comes with an embedded security chip in it that transmits a unique code to the car's system to let you unlock and start the engine. The key fob can also control other features such as rolling down your windows when you are in hot parking areas and requesting the car to come to you so you can reverse into a tight space (a feature that is available on certain Genesis GV60 sedans 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 by yourself with a little knowledge. You'll need a flathead screwdriver and a brand new CR2025 for this. Use the red and the 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 locksmith or dealer. eBay has a variety of options however, they might not be the same color as your existing key fob.
Lockouts
One of the most horrible things that can happen to a driver is getting locked out of their vehicle. There are, however, a few techniques that drivers can employ to gain access back into their vehicle. They should first try calling their local Mazda dealership or locksmith. This is a good option because it's likely to be cheaper and faster than calling a truck. The locksmith or dealer will require 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 vital to save the key code in a safe spot.
Another thing that people can do if they are stuck outside their car is to check the underside of the key fob to locate an additional button. The button is typically a small round one that can be press. This will open the doors of the vehicle, allowing the driver to open them by hand.
The emergency override function is a different method to gain access to an automobile that is locked. This will allow the key fob to take over the functions that are suspended by the theft-deterrent system. This will trigger the hazards lights and sound to prove that the doors, lids for the fuel filler or liftgate are shut.
Transponder Chips
You'll have to replace it if the key fob is equipped with a transponder embedded in the head of the L-shaped key. The chips are unique in identification number that enables your vehicle to start the engine.
When you insert your key and turn it to ON the antenna ring releases an impulsive radio frequency energy that gets to the transponder chip that's in the key's metal. The chip responds by sending a code to the antenna ring. This informs the car that the key is in good condition.
Most Mazdas come with transponder chips with a code that is changing every time you turn it. This means that the key you're using will not work with your car until you have a duplicate that has the exact same code in the ignition cylinder.
It's possible to create your own replacement keys. If you can find a key that works then insert it into your Mazda. Then, turn the ignition on. If the key is able to start your car, you can then copy the data from it onto the other working key. If you need to, you can also utilize the eraser on the key fob to erase the code. It's important to note that this method isn't 100% guaranteed to work, since some transponder chips from recycled systems may not respond correctly.
Programming
The loss of your car keys can be an expensive and lengthy process. Mazda has made programming and adding a third car key a breeze. It's 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 best way to avoid having to pay for a tow and dealership costs.
First, you'll need find a replacement battery to the fob. You can purchase one from the hardware store or at a big box retailer for around $10. You'll also require a flathead screwdriver in order to open the fob. The screwdriver's head must fit into small slots on the back of your fob. After taking the case off, replace the old battery.
Now it's time to set up the new key fob for your vehicle. To do this, put the first working key into the ignition, and turn it to ON. It should be on for about five seconds and then switch off the ignition. Repeat mazda 3 spare key using a second working key, then your new (or spare) key. Once you've completed the procedure then your Mazda should have the ability to be launched using the newly programmed keys. If it's not then there could be a problem with your key fob or vehicle.