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How to Fix Common Mazda 3 Key Problems The Mazda 3 is an elegant compact car with a classy interior and a fluid handling. It's also a fantastic value compared to many other small cars available. It's a major trouble to lose keys. Not only do you have to pay the dealership to tow your car and reprogram your key, but it can also cost you money to replace your spare keys. The key will not lock or unlock the door. It's risky to lock the doors without locking them especially when the vehicle is in motion. If the door is opened when the vehicle is moving it could cause passengers to fall or suffer injuries. Keep the keys out of reach of children to avoid this issue. Children may fi nd them appealing and may want to play with them, which could cause the power windows or other controls to be activated and even make the vehicle move. If you notice that the key fob is not locking or unlocking doors, it probably means that the battery is dead. The button-cell battery on the key fob has a short life span, so it's important to replace it regularly. A quality battery should last between two to three years. When replacing the battery, it is essential to choose a battery with the same size and voltage as the original one. Another reason that the key fob might not be working is a key pairing issue. It's possible that the keyfob wasn't properly associated with the vehicle when it was purchased. In this instance, it will need to be reset by the dealer. This can be done in less than 30 seconds. The dealer can also reset any remaining electric current in the onboard computer. This will not fix your key fob's inability to lock or unlock doors. Dead coin battery It's possible that your battery is not functioning properly if your key fob does not turn on or unlock your vehicle. This is a common issue but one that is able to be repaired. You can replace your battery at home and avoid the hassle of going to a dealer. The process is easy and requires only some basic 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. There's an opening on each side of the case once the metal auxiliary is removed. Make use of a tape-wrapped flathead screwdriver open the case, starting with one side first and then the other. Gently break the two halves, then set them aside. You can now replace the key fob's battery. Be careful not to damage the small rubber ring that the battery sits on. When 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. Find a CR2025 coin cell battery. mazda smart key replacement are commonly used in watches and calculators, however, they can also be bought at auto parts stores or online. Switching the battery in your Mazda 3 is easy and quick, and will save you money on a trip to the dealer. Key pairing issue If you've been driving your Mazda 3 for a long time and suddenly it stopped working, it might be a problem with the remote keyless system receiver module. It is more likely to happen when the chip inside the key fob is damaged. It can be caused by many factors such as a 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. However, submerging it in the ocean or in pool water is an issue that is much more severe due to the highly electrically conductivity of salt may harm the electronics. If your key fob isn't working, you're probably in need of new batteries. A quick search on the web will reveal that there are numerous third-party replacement batteries. It's essential to be aware that they may not be compatible with your Mazda 3. It is recommended to purchase from a dealer in order to be sure that it will work with your Mazda 3. After replacing the battery, you should be able use your key fob for the first time. However, if your remote isn't responding when you press the lock button, the key is likely stuck in power-saving mode. Press the lock button 5 times and hold it for a while until the red light appears. Reprogramming the key The keyless entry system that comes with a Mazda allows you to open and start the car without using the standard key. It's a great convenience but the process to reprogramme the remote or the key can be confusing for a few people. It also requires a special machine that only the dealer or an automotive locksmith can access. This machine is connected the computer in the vehicle, and it begins the programming process for the new key or remote. The first thing to do is have at minimum two keys that work for the Mazda. Then you can begin the reprogramming of a spare key. The functions of the new FOB will be temporarily disabled to safeguard the vehicle from theft. After you've reprogrammed the new key, these functions will be activated once more. You can now utilize the new key to operate the ignition as well as for opening the doors. Check it out first to make sure it is working. If you're worried about losing your keys, it is recommended to keep a spare key on hand. Adding a spare key to your Mazda is a fairly simple process. Just follow these steps and save a considerable amount of money by not having to pay for the dealership to do it for you. This can also save you from the expense of a tow and will also save money on a new spare key.