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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 on the market. It can be a real pain to lose keys. Not only do you'll be paying the dealership to tow your vehicle and reprogramme your keys and it could cost you money to replace your spare keys. The key is not able to lock or unlock the door. If doors are not locked, it can be dangerous, especially if the vehicle is moving. If the door is opened while the vehicle is moving, it could cause passengers to fall out or suffer injuries. To avoid this problem ensure that you keep the keys away from children. Children might find them fascinating and want to play with them. This could cause the power window or other controls to operate and even move the vehicle. If you notice that the key fob isn't locking or unlocking doors, it probably means that the battery is dead. The button cell battery in the key fob has a short time of life, which is why it is essential to replace it regularly. A good battery will last between two and four years. When replacing the battery, it's important to use a battery with the same size and voltage as the one that was originally. A problem with key pairing could also be the reason behind your key fob not working. It is possible that the key fob was not linked properly with the car when it was first purchased. In this situation the dealer needs to reprogramme it. This can be accomplished in less than one minute. The dealer can also reset the onboard computer to erase any remaining electric current. This will not fix the issue with your key fob's inability lock or unlock doors. Dead coin battery It's possible that the battery is not functioning properly if your key fob isn't turning on or unlock your vehicle. It's a common problem, however, it can be repaired. You can replace your battery at home and avoid a trip to a dealership. The procedure is easy and requires just some tools. Press the auxiliary key button located on the back of the Mazda flip key. This will open the auxiliary metal key, allowing you to take it off. After the auxiliary key made of metal is removed, you'll find an opening on either side of the fob case. Use a tape-wrapped flathead screwdriver to pry open the case, starting with one side first and then the other. Gently pry the two parts of the case and place them aside. You can now replace the key fob's battery. You don't want damage to the rubber ring that the battery is mounted. Once the battery has been replaced, you can put it back into the case and enjoy your new key fob! Most stores that sell batteries also carry a replacement battery. Find a CR2025 battery. These batteries are often used in watches and calculators, but they can also be found at auto parts stores, or online. It is simple and quick to change the battery in your Mazda 3. This will save you money and avoid the hassle of a visit to a dealer. Key pairing issue If your Mazda 3 has been working for a while, but then suddenly stops it could be because of the remote keyless receiver module. It is more likely to happen if the internal chip of the key fob has been damaged. This could be due to a number of reasons, including dropping the key or being exposed to water. Fortunately, the key fob's electronic chips are protected by rubber seals, and should be fine with splashes of water. However, submerging it in swimming pool or ocean water can be the most serious risk, as the highly conductivity of salt could harm the electronics. If your key fob does not function, you might require a new battery. A quick search of the internet will show that there are many third-party replacement batteries. But, it's important to keep in mind that they might not be compatible with your Mazda 3. It's best to buy from a dealer to ensure that it's compatible with your Mazda 3. Once you've replaced the battery the key fob will work again. If the remote does not respond when you press the lock button, it is likely that the key is stuck in power saving mode. Press the lock button five times, and hold it until the red light flashes. Reprogramming G28 allows you to open the door and start it without the requirement for a traditional key. This is a fantastic convenience, but the process of programming the remote or key might be complicated for some people. It also requires a machine that only the dealer or automotive locksmith has access to. This machine is connected to the vehicle's computer, and it starts the programming process for a new key or remote. The first step is to ensure that you have at least two working keys for the Mazda. The next step is changing the programming of a spare key. The functions of the new FOB will be temporarily disabled to protect the vehicle from theft. After you've reprogrammed the key, it is possible to activate these functions in the future. You can now utilize the new key to operate the ignition and to open the doors. Try it out to make sure it is working. Keep a spare set of keys if you're worried about losing your keys. Adding a spare key to your Mazda is a fairly simple procedure. You can save money by following these easy steps. This will also help you avoid a costly tow bill and also save money on a spare key.