Mazda 3 Key Fob Replacement

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

Find the small button at the back of your key fob. Press this and remove the cover.

Lost Keys

Losing your car keys was an issue of minor importance. It was relatively inexpensive to replace them in any hardware store, dealer or locksmith. Today, your car's advanced key fob can do more than just lock and start your vehicle, and that added convenience comes with a price and that's more expensive replacements.

The key fob comes with a security chip that transmits an exclusive code to the computer in the car to unlock and begin the. The key fob is also capable of controlling some other functions, 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).

Mazda's remote controls aren't as expensive as other carmakers'. You can even replace the key fob battery yourself, with a bit of know-how. You'll require a flathead screwdriver along with a new CR2025 to accomplish this. Use the red and directional buttons to lock and unlock your doors before changing the batteries.

If you're looking 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. There are a variety of options available on eBay, though they may not have the same color or logo that your current key fob.

Lockouts

One of the most devastating things that can happen to a driver is becoming locked out of their vehicle. There are a few tricks drivers can employ to gain entry into their vehicle. It is best to first call their local Mazda dealership or locksmith. This is a great option as it's likely be less expensive and quicker than calling a tow truck. A locksmith or dealer needs to purchase a key code in the database to be able to create a brand new fob. It's about $100. This is why it's important to save the code in a safe place.

If you're stuck outside your car, the other thing people can do is look for an additional key that is located on the underside. The button is typically tiny and round. It can be activated. This will unlock the doors of the vehicle, allowing the owner to open them manually.

Another way to enter an unlocked vehicle is using the emergency override feature. This allows you to use your key fob to override functions that have been suspended by the theft deterrent system. This usually triggers the hazards warning lights and make a sounds to confirm that the doors, fuel-filler lid or liftgate are locked.

Transponder Chips

You'll need to replace it if your key fob has a transponder that is built into the metal head of the L-shaped key. These chips have a unique identification number that works with your vehicle to turn on the engine.

The antenna ring releases a burst of radio frequency energy when you insert your metal key and switch it on. This energy reaches the chip transponder inside the key. The chip responds with the code that's transmitted to the antenna ring, telling the car that it's an authentic key.

Most Mazdas utilize a rolling code transponder chip which changes its code each time you turn the key. This means that the key you're using will never be compatible with your vehicle until you have a duplicate with the exact code in the ignition cylinder.

It's possible to make your own replacement keys. If you're able find an original key, insert it inside your Mazda and turn the ignition to ON. You can copy the information from the key to the other key if it is able to start your Mazda. You could also try the eraser procedure on your key fob to erase the current code, if needed. It's important to keep in mind that this method is not guarantee that it will work, as some transponder chips from recycled systems might not function correctly.

Programming

Losing your car key is expensive and time-consuming. Mazda has made adding and programming a third car key easy. This can be accomplished in a couple of steps, and you don't need to pay an agent for this service. You can avoid paying for towing or dealer fees if you own an additional car key.

First, you'll need to find a replacement battery to the fob. One can be purchased at a big box store or hardware store for around $10. To open the fob, you'll require an screwdriver with a flat head. The screwdriver's head should fit into an opening on the back of the fob. After removing the case, replace the old battery.

It's time to add the new key fob to your vehicle. To do this, simply insert the first working key into the ignition and then turn it ON. After about five seconds, then switch it off. Repeat the process with a different working key, then your new (or spare) key. After you've completed this and your mazda key should now be able initiated using the newly-programmed keys. If not, there may be another issue with your key fob or vehicle.