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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 great bargain compared to other compacts available. mazda 3 key replacement can cause a lot of troublesome. It's not just that you'll have to pay the dealership to tow your car and reprogramme the key, but it can also cost money to replace spare keys. The key will not lock or unlock the door Unlocking the doors could be very dangerous, particularly if the vehicle is moving. If the door is opened while the vehicle is moving it can cause passengers to fall out or suffer injuries. Keep keys out of reach of children to avoid this problem. Children may fi nd them interesting and play with them, which could cause the power windows or other controls to be activated or even cause the car to move. If you notice that your key fob is not locking or unlocking the doors, it's likely that the battery is dead. The button cell battery in the key fob has a short time of life, which is why it is vital to replace it regularly. A good battery is expected to last between two and three years. When replacing the battery, it's important to choose a battery with the same voltage and size as the original one. Another reason for why the key fob might not be working is due to a key pairing issue. It is possible that the keyfob was not properly paired with the vehicle when it was purchased. In this instance the dealer has to reprogram the key fob. Fortunately it is possible to do this in under a minute. The dealership can also reset the onboard computer to eliminate any remaining electricity. This will not solve the issue with your key fob's inability lock or unlock doors. Dead coin battery If your key fob isn't turning on or unlocking your car, it may be because the battery is dead. This is a common issue but one that can easily be solved. You can replace the battery yourself, saving you going to the dealer. The procedure is simple and requires only the use of a few basic tools. Then press the auxiliary key button on the back of your Mazda flip key. This will allow you to remove the metal auxiliary keys. Once the metal auxiliary key is removed, you'll notice the slot on either side of the fob case. Start with one side of the case and work your way around with a tape-wrapped screwdriver. Gently pull the two parts of the case and set them aside. Now you'll have a clear view of the key fob's battery and you can replace it. Be careful not to scratch the small rubber ring that the battery sits on. After the battery is replaced, you can reassemble your case and enjoy the new key fob. You can find replacement batteries at many stores that sell batteries. Search for a CR2025 battery. These batteries are often used in calculators and watches however, they can be bought at auto parts stores, or online. It's simple and fast to replace the battery in your Mazda 3. This will save you money and avoid having to visit a dealership. 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. This is more likely to occur when the chip inside the key fob is damaged. This can be caused by several factors, such as an unintentionally dropped or wet key. Fortunately the key fob's digital chips are protected by rubber seals and should be fine even with splashes of water. However, submerging it in ocean or pool water is an issue that is much more severe because the highly conductivity of salt can cause damage to the electronic components. If your key fob has stopped functioning, you're most likely in need of an entirely new battery. A quick search on internet will show that there are countless third-party replacement batteries. It is important to keep in mind that these batteries may not be compatible with your Mazda 3. It is best to purchase it from a dealer in order to be sure that it's compatible with your Mazda 3. After replacing the battery, you should be able to use your key fob again. If the remote doesn't respond when you press on the lock button, it is likely that the key has been stuck in power saving mode. To get it out of this mode you'll need to press the lock button five times and then hold it down until the red light turns on. Reprogramming a key Mazda's keyless entry system allows you to open the door and start it without the need for an ordinary key. This is a wonderful convenience however the process of reprogramming the remote or key may be difficult for some. It also requires a special machine that only the dealer or automotive locksmith can access. 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 minimum two keys that work for the Mazda. The next step is changing the program of a spare one. Initially the functions of the new FOB are turned off to protect the car from theft. After you've reprogrammed the key, you'll be able to activate these functions in the future. Then, you can use the new key to unlock the doors and start the engine. Make sure it works. Keep a spare set of keys if you're concerned about losing your keys. It's easy to add a spare Mazda key. You can save money by following these easy steps. This will also help you avoid the expense of a tow and save money on a spare key.