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How to Fix Common Mazda 3 Key Problems The Mazda 3 is a stylish compact car that has a smooth handling and luxurious interiors. It's also a great deal cheaper than many other compacts on the market. Lost keys can cause a lot of issue. It is costly to replace keys that are lost, as well as taking your vehicle to a dealer to reprogram your key. Keys not locking or unlocking doors It's risky to lock the doors without locking them especially when 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 risk it is recommended to keep your keys away from children. Children might find them fascinating and enjoy playing with them. This could cause the power window or other controls to work and even cause the vehicle to move. If you notice that your key fob isn't locking or unlocking the doors, it could mean that the battery is dead. The button cell battery that is in the key fob has a restricted lifespan, therefore it is important to replace it regularly. A good battery should last between two to three years. It is important to replace the battery with a new one that is the same voltage and the same size as the original. Another reason that the key fob may not be working is due to a key pairing issue. It's possible that the keyfob was not properly paired with the vehicle when it was purchased. In this case the dealer has to reprogram it. This can be accomplished in under a minute. The dealer can also reset the on-board computer to erase any remaining electricity. This won't fix the issue with your key fob's inability to lock or unlock doors. Dead coin battery It's possible that your battery is dying if your key fob isn't turning on or unlock your car. This is a frequent issue however it can be easily fixed. You can replace the battery on your own, avoiding going to the dealer. The procedure is simple and requires just two 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. After the auxiliary key made of metal is removed, there will be a slot on either side of the fob case. Start with one side of the case and move around using a tape-wrapped screwdriver. Gently pull the two halves of the case and set them aside. You can now replace the battery in the key fob. You don't want to damage the rubber ring that the battery is positioned. After the battery has been replaced, you can reassemble your case and take pleasure in the new key fob. The majority of stores that sell batteries carry a replacement battery. Look for a CR2025 coin cell battery. These batteries are used primarily in calculators and watches however, they can also be bought at auto parts stores or on the internet. mazda keys replacement is simple and quick to change the battery in your Mazda 3. This will save you money and avoid an appointment with a dealer. Key pairing issue If you've been driving your Mazda 3 for a long period of time, and then it suddenly stopped working, it may be a problem in the remote keyless system receiver module. This can happen if the internal chip of the key fob is damaged. This could be the result of a number of reasons, including dropping the key or exposure to water. The key fob's electronic components are protected by rubber seals, so a splash of rain will not cause damage to them. The key fob's submersion in pool or ocean water could be a major issue due to the fact that salty water is extremely conductive and may harm the electronic components. If your key fob is not working, it's likely that you're in need of a new battery. There are a wide range of third-party batteries on the internet. It's essential to remember that they may not be compatible with your Mazda 3. It's a good idea to purchase one from a dealership and make sure that it's certain to work with your vehicle. After you've replaced your battery the key fob should function again. If the remote doesn't respond when you press on the lock button, it is likely that the key is stuck in power saving mode. To get it out of this mode you'll have to press the lock button five times and hold it until the red light flashes. Reprogramming an encryption key The keyless entry system of the Mazda allows you to open and start the car without the regular key. It's a great feature, but the process of reprogramming the remote or key could be confusing for some. It also requires a machine that only the dealer or an automotive locksmith has access to. This machine is connected the car's computer and initiates the process of programming for the new key or remote. The first step is having at least two keys that work for the Mazda. You can then proceed with reprogramming a spare key. Initially the functions of the new FOB are halted to protect the vehicle from theft. After you've reprogrammed the new key, these functions will be activated once more. After that, you are able to use the new key to unlock the doors and start the engine. You should first test it to ensure it works. If you're worried about losing keys, it's best to keep a spare one in your possession. Making a spare key for your Mazda is a fairly simple process. Just follow these steps and you'll be able to save a lot of money, as you don't have to pay the dealership to complete the task for you. This will save you money on towing costs and an extra key.