Mazda 3 Key Fob Replacement

Mazda 3 owners may need to replace the battery in their key fob from time to time. This is an easy task that you can do yourself.

To change the battery, find the small button on the back of the key fob. Press the button, then remove the cover.

Lost Keys

The loss of your car keys used to be an inconvenience that was minor. It was relatively inexpensive to replace them at any hardware store, dealer or locksmith. Today, your vehicle's high-tech key fob does more than lock and start your car with ease, and that added convenience comes with a price and that's more expensive replacements.

The key fob is equipped with an embedded security chip in it that sends a unique code to the car's computer to allow you to unlock and begin the engine. The key fob is capable of controlling various other features, including opening the windows when you're in a hot parking area and calling your car to you for easier reversing into an area that is tight (a feature available on some Genesis GV60 and Hyundai Sonata sedans).

Fortunately, Mazda's remotes aren't as costly as those from other automakers. You can even replace the key fob battery yourself, with a knowledge. To do this, you'll need the smallest flathead screwdriver an updated CR2025 battery, and your key fob. Use the red and the directional buttons to lock and unlock your doors prior to changing the batteries.

If you're looking 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. You'll find many options on eBay, though they may not have the exact logo or color as your current key fob.

Lockouts

A driver being locked out of their vehicle is among the most unpleasant things that can occur. There are some tricks that drivers can use to gain access into their car. First, they should call their local Mazda dealership or locksmith. This is a good idea as it's likely be less expensive and faster than calling a tow truck. The dealer or locksmith will need to buy a key code from the database to cut you a new key fob, which is usually about $100. This is the reason it's essential to keep the key code in a safe location.

The other thing that people can do when stuck outside of their vehicle is to examine the underside of the key fob to locate an auxiliary button. The button is typically smaller and round, but can be press. This will unlock the doors to the vehicle and allow the driver to open them manually.

Another method to gain entry into an unlocked vehicle is using the emergency override feature. This allows you to use your key fob to bypass any functions that have been 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 is closed.

Transponder Chips

If your key fob has an embedded transponder chip in the head of the metal L-shaped key, you'll need a locksmith or dealer to have it replaced. These chips contain an identification code that allows you to start your car.

The antenna ring emits a blast of radio frequency energy when you insert your metal key and turn it on. The energy is then absorbed by the chip transponder within the key. The chip then responds with the code that's transmitted to the antenna ring, telling the car that it's a valid key.

Most Mazdas come with transponder chips with a code that is changing every time you turn it. This means that your key will not work with your vehicle until you have a second copy that has the exact same code in the ignition.

It's not hard to make your own replacement key. If you can locate an original key that works in your Mazda. Then, turn the ignition on. You can copy the information from the key to the second key if it starts your Mazda. If you're in need, you can also make use of the eraser on your key fob to remove the code. It's important to keep in mind that this method is not certain to work as some transponder chips from recycled systems might not be able to respond properly.

Programming

Losing your car key can be a costly and time-consuming experience. Luckily, Mazda has made it easy to add and program an additional key. This can be accomplished in just a few steps, and you don't need to pay an agent for this service. You can avoid paying for a tow or dealership fees if there is an additional car key.

It is necessary to purchase a new battery for the key fob. You can purchase one at the big box retailer or at a hardware store for approximately $10. You'll also require a flathead screwdriver to open the fob. The screwdriver head should fit into small slots on the back of the fob. After removing the case replace mazda key the old battery.

Now it's time to set up the new key fob to your vehicle. Insert the first key that works into the ignition and turn it ON. Wait about five seconds, and then turn it off. Repeat the process with a different working key, and then your new (or spare) key. Once you've done this, the newly programmed key should be able to start your Mazda. If it's not, there may be another issue with the key fob, or the vehicle.