10 Things Everybody Hates About Mazda 3 Key Fob Mazda Key Fob Replacement

A key fob that does not work means you may not be able to access your car. A locksmith can easily and inexpensively fix this problem.

The battery inside your Mazda key fob is usually fairly inexpensive to replace. The owner's manual will provide instructions, or you can find online videos on how you can do it yourself.

How do you open the door of a Mazda Key Fob

If your Mazda key fob has stopped working as well or the operation indicator light has stopped flashing, it might be time to replace the battery. Fortunately it's one of the easiest tasks to do at home with just a few tools.

The Mazda key fob runs on the CR2025 battery which can be found in most stores and websites that sell batteries. They are priced at about $4 for a set of four and are offered in a variety of sizes.

You can use a tape-wrapped flathead screwdriver to open the Mazda key fob case. Press the button for the auxiliary on the back of the fob to remove the keys that are made of metal and then use the screwdriver on both sides to remove the case. Be sure to work in a slow manner in order to avoid damaging the case, and to keep the screwdriver tip from getting scratched.

Remove the battery after you have opened the key fob. Be sure to carefully inspect the rubber ring on which the battery sits to ensure it is in good working order. Then, insert your new CR2025 battery and ensure that the positive side is facing up towards you. Replace the case and re-cover the screwdriver, then put everything back together as instructed in the manual of your owner for your Mazda CX-5 or other model.

Battery Replacement

Mazda key fobs are simple to replace. However it is best to do it before the battery has completely shut down. It could also result in the car's ability to start and unlock the doors to be affected. This could be extremely dangerous, especially if you have children who are small in the vehicle.

The battery is at the bottom of the key fob. It's usually slightly bigger than a coin and comes with two terminals. There will be two coins: one marked with red (+) and a black one that is marked (-).

Use a screwdriver that is taped first to pry the case open on one side, and then the other. Do not press the case to open or you risk damaging the internal components. Once the case is removed, you can see a small rubber ring that the battery sits on. The ring has the code number printed on it. The code number should be kept in a safe place away from the vehicle, for future reference if needed.

After you've replaced the battery and put it back together, you can put it back together. Reattach the case and be sure to insert both sides of the case into the key fob until you hear it click.

Ignition Replacement

For the most part, it is fairly easy to replace the battery of a car key fob and you can do it at home without the need of a professional. Many experts recommend having an extra battery at home. You can find them in most hardware stores. This will reduce the cost of a replacement fob which can be as high as $500 for luxury models and $250 for the cheapest cars.

However, if the ignition key is stuck in the ignition, it will be much more difficult to take it out. Modern ignitions are complicated systems that require a sequence of movements to work correctly. If something disrupts this process, for instance broken keys or an ignition lock pin, then the ignition can become jammed and the key could get stuck inside.

If the ignition is damaged, then you'll have to get it repaired or replaced. This is a challenging task that is dependent on the make and the make of your vehicle. Some dealerships provide this service, however it's typically more expensive than hiring an independent mechanic.

You'll have to pay a locksmith the programming of the new key, in addition to the cost of replacing or repair the ignition. If new mazda key does not have a basic ignition system this will be impossible to do at home.

Key Blanks

The key fob does more than just lock the car and start it. It also comes with features like opening the windows and summoning the car when it's in a difficult spot and auto-parking. This is why they're so useful, but they can also be a bit frustrating if you have to replace or break one.

The positive side is that many modern key fobs are fairly simple to replace. You can generally do it yourself using a screwdriver, and a new cell. Some key fobs sound warnings when their lifespan is nearing its expiration date. Experts recommend keeping an additional battery and a small screwdriver in the glove box or on the center console in case you have to replace your old one.

A locksmith can also give you a new key. These professionals may need a working key from the vehicle to program the new device, so it is important to find a locksmith who will require proof of ownership or registration prior to when they begin. Finally, you can also try purchasing a new fob online from a reliable seller.


The insurance of your car may cover a key fob in case it's not working. However, going this route means you'll have to pay for a new fob and also your car's deductible, which can be costly when the fob cost hundreds of dollars.