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How to Fix Common Mazda 3 Key Problems The Mazda 3 is a stylish compact car with a responsive handling and luxurious interiors. It's also a fantastic value when compared with other compact cars available. Lost keys can be a huge issue. Not only do you'll need to pay for the dealer to tow your car and reprogramme your keys as well, but it could also cost you money to replace your spare keys. The key does not lock or unlock the door The doors left unlocked can be extremely dangerous, particularly if the vehicle is moving. If the door remains unlocked while the vehicle is in motion passengers could fall out or suffer injuries. To avoid this, you should always keep your keys away from children. Children may find them interesting and enjoy playing with them. This could cause the power window or other controls to be activated and even move the vehicle. If you notice that the key fob is not locking or unlocking doors, it could mean that the battery is dead. The button cell battery on the key fob has a restricted time span, so it's vital to replace it regularly. A good battery is expected to last between two and three years. When replacing the battery, it is important to choose a replacement battery with the same size and voltage as the one that was originally. Another reason for why the key fob might not be working is due to a key pairing issue. It is possible that the keyfob wasn't properly linked to the vehicle when it was purchased. In this instance, it will need to be reprogrammed by the dealer. This can be done in less than an hour. The dealer can also reset the on-board computer to clear any residual electric current. However, this won't alter the key fob's capability to lock or unlock doors. Dead coin battery If your key fob won't be working or unlocking your car, it could be because the battery is dead. This is a common problem however it can be easily fixed. You can replace your battery yourself and avoid a trip to a dealership. The process is easy and requires only a few tools. Then, press the auxiliary key button on the back of your Mazda flip key. This will allow you to take off the auxiliary keys made of metal. Once the metal auxiliary key is removed, you'll find the slot on either side of the fob case. Start with one side of the case and move around with a tape-wrapped screwdriver. Gently pull the two halves of the case apart and put them aside. You can now replace the key fob's battery. Be careful not to damage the ring of rubber that the battery sits on. Once the battery is replaced, you can reassemble the case and take pleasure in your new key fob! You can locate batteries to replace at all stores that sell batteries. Look for a CR2025 coin cell battery. These batteries are typically used in watches and calculators, but they can also be purchased at auto parts stores or online. It's easy and quick to change the battery in your Mazda 3. This will save you money and avoid an appointment with a dealer. Key pairing issue If you've been driving your Mazda 3 for a long time and suddenly it stopped working, it may be a problem in the remote keyless system receiver module. This can happen if the internal chip of the key fob has been damaged. This may be due to many reasons, including an accidental drop of the key or exposure to water. Fortunately the key fob's digital chips are protected by rubber seals, and should be fine with a splash of water. However, submerging it into the pool or ocean water is the most serious risk due to the highly conductive nature of salt can damage the electronics. If your key fob has stopped working, it's likely that you're in need of an upgrade to the battery. A quick search on the internet will reveal that there are numerous third-party replacement batteries. It's important to keep in mind that these batteries may not be compatible for your Mazda 3. It's recommended to buy one from the dealership and make sure that it's sure to work with your vehicle. After replacing the battery, your key fob should be functioning again. If the remote doesn't respond when you press the lock button, it's likely that the key is stuck in power saving mode. To remove it from this mode it's necessary to press the lock button five times and hold it until the red light blinks. Reprogramming a key Mazda's keyless entry system lets you to unlock your car and then start it without the requirement of an ordinary key. This is a great convenience however, the process of reprogramming the remote or the key could be difficult for some. This also requires a computer that is available only to the locksmith in the car or dealer. This machine is connected to the computer in the vehicle, and it begins the programing process for a new key or remote. The first step is to ensure that you have at least two functioning keys for the Mazda. Then mazda key fob can proceed with the reprogramming of a spare key. Initially the functions of the new FOB are suspended to protect the car from theft. After you've reprogrammed the new key, these functions can be activated again. After that, you will be able to use the new key to unlock the doors and then start the engine. Test it first to make sure it works. If you're worried about losing your keys, it's a good idea to keep a spare key on hand. It is simple to add a spare Mazda key. Follow these steps and you'll save a considerable amount of cash by not having to pay a dealership complete the task for you. This will save you money on a tow bill and a spare key.