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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 a luxurious interior. It is also a great deal cheaper than many other compacts on the market. Lost keys can be a huge issue. Not only will you'll have to pay the dealership to tow your vehicle and reprogramme your key, but it can also cost you money to replace the spare keys. Key not locking or unlocking doors It's risky leaving doors unlocked, especially when the vehicle is in motion. If the door is locked while the vehicle is moving passengers could be thrown out or injure themselves. To avoid this issue ensure that you keep your 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 work and even move the vehicle. If you notice that your key fob is not locking or unlocking the doors, it is likely that the battery is dead. The button-cell battery inside the key fob has a finite lifespan, which is why it's important to replace it regularly. A good battery should last between two and three years. When replacing the battery, it's important to select a battery that has the same size and voltage as the original one. A problem with key pairing could also be the reason behind your key fob not working. replacement mazda key is possible that the key fob was not linked correctly with the vehicle when it was first purchased. In this case, it will need to be reset by the dealer. Fortunately, this can be done within a matter of minutes. The dealer can also reset the onboard computer to erase any remaining electrical charge. But, this will not make the key fob more able to lock or unlock doors. Dead coin battery It's possible that your battery is dying if your key fob won't turn on or unlock your vehicle. This is a typical issue but it can be easily fixed. You can replace the battery on your own, avoiding a trip to the dealership. The procedure is simple and requires only two tools. Press the auxiliary key button located on the back of the Mazda flip key. This will let you take off the auxiliary keys made of metal. There's slots on both sides of the case once the auxiliary's metal has been removed. Begin with one side of the case and work your way around using a tape-wrapped screwdriver. Gently break the two halves and put them aside. You can now change the battery on your key fob. Be careful not to damage the small rubber ring the battery sits on. After the battery is replaced, you can put it back in your case and use the new key fob. Most stores that sell batteries have a replacement battery. Find a CR2025 battery. These batteries are often used in watches and calculators however they can also be found in auto parts stores as well as online. Making the change to the battery in your Mazda 3 is easy and quick, and can save you money on a trip to the dealership. Key pairing issue If your Mazda 3 has been working for a while, but then suddenly stops, it could be the remote keyless receiver module. This is especially likely if the key fob's internal chip is damaged. This could be due to a variety of factors such as a dropped or wet key. Fortunately, the key fob's electronic chips are protected by rubber seals and should be fine with splashes of water. However, submerging it into ocean or pool water is an even more serious issue, as the highly conductivity of salt can cause damage to the electronics. If your key fob does not work, you may require new batteries. There are a wide range of third-party batteries on the internet. It's essential to note that they might not work with your Mazda 3. It's recommended to buy one from the dealership and ensure that it's 100% guaranteed to work with your vehicle. After you've replaced the battery the key fob should function again. If the remote doesn't respond when you press the lock button, it is probably stuck in power-saving mode. To remove it from this mode you'll have to press the lock button five times, and then hold it down until the red light appears. Reprogramming the key The keyless entry system in the Mazda allows you to open and start the car without the traditional key. It's a great benefit however the process of reprogramming the remote or key may be difficult for some. This requires a machine that is accessible only to the locksmith in the car or dealer. The machine is connected to the car's computer and begins the programming procedure for the new key or remote. The first step is to have at least two keys that work for the Mazda. Then you can move on to the reprogramming process of a spare key. The functions of the new FOB will be temporarily disabled to protect the vehicle from theft. After you've reprogrammed your new key, you'll be able to activate these functions and again. You can now use the new key to turn on the ignition as well as for opening the doors. It is important to test it first to ensure that it works. Keep a spare set of keys around if you are worried about losing your keys. Making a spare key for your Mazda is a relatively simple process. You can save money by following these simple steps. This will also help you avoid an expensive towing bill and save money on a new spare key.