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How to Fix Common Mazda 3 Key Problems The Mazda 3 is a stylish compact car that is agile in its handling and a luxurious interior. It's also a good value compared to other compact cars available. Lost keys can cause a lot of issue. It can be expensive to replace keys that are lost, and also towing your car to a dealer to reprogram your key. The key does not lock or unlock the door It's dangerous leaving doors unlocked particularly when the vehicle is in motion. If the door is opened while the vehicle is moving it could cause passengers to fall or suffer injuries. Keep keys out of the reach of children to avoid this issue. 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 isn't locking or unlocking the doors, it could mean that the battery is dead. The button-cell battery inside the keyfob has a limited life span, so you should replace it regularly. A quality battery should last between two and four years. It is important to replace the battery with one with the same voltage and the same size as the original. Another reason that the key fob may not be working is a key pairing issue. It is possible that the keyfob was not properly connected to the vehicle at the time it was purchased. In this case it must be reprogrammed by the dealer. Fortunately this can be accomplished within a matter of minutes. The dealer can also reset the onboard computer to remove any remaining electric current. This will not solve your key fob's inability to lock or unlock doors. Dead coin battery If your key fob is not activating or unlocking your car, it could be because the battery is dead. This is a common issue however, it is easily solved. You can replace the battery yourself, avoiding having to visit a dealership. mazda 2 car key G28CarKeys is easy and requires only a few tools. Press the auxiliary key button located on the back of the Mazda flip key. This will open the metal auxiliary key and allow you to take it off. You'll see slots on both sides of the case once the auxiliary's metal is removed. Use a tape-wrapped flathead screwdriver to open the case, starting with one side and then the opposite. Gently pull apart the two halves, then set them aside. Now you'll have a clear view of the battery on the key fob and you can replace it. Be careful not to scratch the small rubber ring that the battery is placed on. Once the battery is replaced, you can reassemble the case and take pleasure in your new key fob! Most stores that sell batteries carry a replacement battery. Look for a CR2025 coin cell battery. These batteries are commonly used in watches and calculators however they can also be found at auto parts stores or online. It's simple and fast to change the battery in your Mazda 3. This will save you money by avoiding an appointment with a dealer. Key Pairing Issue If your Mazda 3 has been working for a few days and then suddenly stops and then it's possible that it's the remote keyless receiver module. This is particularly true in the event that the key fob's chip is damaged. This can be caused by a variety of factors such as an unintentionally dropped or wet key. The key fob's electronic components are protected by rubber seals so a splash of rain shouldn't cause any damage. Submerging the key fob into pool or ocean water can pose a serious problem due to the fact that salty liquid is extremely conductive and could damage the electronic components. If your key fob will not work, you may require an upgrade to the battery. You can locate a variety of third-party batteries available on the internet. It's essential to be aware that they may not be compatible with your Mazda 3. It is recommended to purchase from a dealer to ensure that it is compatible with your Mazda 3. After replacing the battery, you'll be able to use the key fob again. However, if the remote doesn't respond when you press the lock button, the key is likely to be in power-saving mode. To remove it from this mode you'll have to press the button five times and hold it until the red light blinks. Reprogramming the key Mazda's keyless entry system enables you to unlock your car and start it up without the requirement for a traditional key. This is a great convenience however, the process of reprogramming the remote or the key could be difficult for some. It also requires a machine that only the dealer or an automotive locksmith can access. This machine is connected to the car's computer and it begins the programing process for the new key or remote. The first step is having at least two keys that function for the Mazda. You can then proceed with changing the program of a spare one. The functions of the new FOB will be temporarily removed to protect the vehicle from theft. After you've reprogrammed the key, you'll be able to activate these functions once more. Then, you can use the new key to open the doors and start the engine. Try it out to make sure it works. Keep a spare set keys around if you are concerned about losing your keys. Adding a spare key to your Mazda is a straightforward procedure. Follow these steps and you'll be able to save a significant amount of money, as you don't have to pay the dealership to complete the task for you. This can also save you from an expensive towing bill and also save money on a spare key.