How to Fix Common Mazda 3 Key Problems
The Mazda 3 is a stylish compact car with agile handling and a luxurious interior. It's also a good bargain compared to other compacts available.
Lost keys can be a huge issue. Not only does it mean you'll be paying the dealer to tow your vehicle and reprogramme your key, but it can also cost money to replace the spare keys.
The key cannot lock or unlock the door.
The doors left unlocked can be extremely dangerous, particularly when the vehicle is moving. If the door is opened when the vehicle is moving it can cause passengers to fall or be injured. To avoid this, you should always keep your keys away from children. Children might find them fascinating and enjoy playing with them. This could cause the power window or other controls to work and even move the vehicle.
If you notice the key fob won't unlock or lock the doors, the battery could be dead. The button cell battery in the key fob has a restricted lifespan, therefore it is vital to replace it regularly. A good battery will last between two and three years. It is crucial to replace the battery by a replacement that is of the same voltage and the same dimensions as the original.
Another reason why the key fob may not be working is due to a key pairing issue. It could be that the key fob was not connected properly with the car when it was first purchased. In this case the key fob will need to be reprogrammed by the dealership. Fortunately, this can be done in just a few minutes. The dealership can also reset the on-board computer to remove any remaining electricity. However, this will not fix the key fob's ability to lock or unlock the doors.

Dead coin battery
It's possible that the battery is dead if your key fob does not turn on or unlock your car. This is a common problem, but it can be easily solved. You can replace your battery at home and avoid having to visit a dealer. The procedure is easy and requires only the use of a few tools.
Press the auxiliary key button on the back of the Mazda flip key. This will allow you to take off the auxiliary keys made of metal. After the auxiliary key made of metal is removed, there will be there is a slot on both sides of the fob case. Make use of a tape-wrapped flathead screwdriver to break open the case starting with one side first and then the other. Gently pry the two sides of the case and put them aside.
Now you'll be able see clearly of the key fob battery which means you can replace it. You don't want to damage the rubber ring on which the battery is mounted. When the battery is replaced, you can put it back into the case and take pleasure in your new key fob!
You can buy a replacement battery at most stores that sell batteries. Search for a CR2025 battery. These batteries are used primarily in watches and calculators, but they can also purchased at auto parts stores or on the internet. Making the change to the battery in your Mazda 3 is easy and fast, and will save your money on a trip to the dealership.
Key Pairing Problem
If your Mazda 3 has been working for a while, but then suddenly stops and then it's possible that it's the remote keyless receiver module. This is more likely to occur in the event that the internal chip on the key fob is damaged. This can be caused by various factors like dropping or wet keys.
The key fob's electronics are protected by rubber seals, so a splash of rain will not cause damage to them. However, submerging it in ocean or pool water is the most serious risk due to the highly electrically conductive nature of salt can cause damage to the electronic components.
If your key fob does not work, you may need an upgrade to the battery. A quick search on internet will show that there are countless third-party replacement batteries. However, it's important to keep in mind that they might not be compatible with your Mazda 3. It is recommended to purchase from a dealer to make sure that it's compatible with your Mazda 3.
After you've replaced the battery the key fob will function again. However, if the remote isn't responding when press the lock button, it is probably stuck in power-saving mode. To get it out of this mode you'll need to press the lock button five times and hold it until the red light blinks.
Reprogramming the key
The keyless entry system in a Mazda allows you to open and start the car without the regular key. It's a wonderful convenience, but the process to reprogramme the remote or key can be confusing for some. It also requires a particular machine that only the dealer or an automotive locksmith can access. This machine is connected to the computer in the vehicle and it begins the programing process for the creation of a new key or remote.
The first step is to have at least two working keys for the Mazda. You can then proceed to the reprogramming of a spare key. Initially the functions of the new FOB are turned off to protect the car from theft. After you've reprogrammed the key, it is possible to activate these functions in the future.
Then, new mazda key can use the new key to open the doors and then start the engine. Check it out first to make sure it works. If you're worried about losing keys, it's best to keep a spare key around.
Making a spare key for your Mazda is a relatively simple process. Just follow these steps and save a considerable amount of money since you do not have to pay a dealership complete the task for you. This can also save you from the expense of a tow and will also save money on a spare key.