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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 luxurious interiors. It's also a great value when compared to other small cars available. It can be a huge problem to lose keys. It's expensive to replace spare keys, as well as driving your car to a dealer to reprogram your key. Keys not locking or unlocking the doors It is dangerous to leave doors unlocked particularly when the vehicle is in motion. If the door is opened while the vehicle is moving it can cause passengers to fall out or even be injured. To avoid this risk be sure to keep your keys away from children. Children may fi nd them interesting and play with them, which could cause the power windows or other controls to be activated and even make the vehicle move. If you notice the key fob isn't able to lock or unlock the doors, the battery might be dead. The button-cell battery on the key fob has a short time of life, which is why it is essential to replace it regularly. A quality battery should last between two and four years. It is crucial to replace the battery by a replacement that is the same voltage and same dimensions as the initial. A key pairing issue may also be the reason behind your key fob not working. It could be that the key fob was not connected correctly with the vehicle when it was first purchased. In this situation it must be reprogrammed by the dealer. This can be accomplished in less than 30 seconds. The dealership can also reset the onboard computer to eliminate any remaining electric current. This won't fix your key fob's failure to lock or unlock doors. Dead coin battery It's possible that your battery is dead if your key fob won't turn on or unlock your vehicle. This is a common issue but it is one that can be solved. You can replace your battery at home and avoid a trip to a dealership. The procedure is simple and requires only the use of a few basic tools. Press the auxiliary key button on the back of the Mazda flip key. This will allow you to remove the metal auxiliary keys. Once the metal auxiliary key is removed, there will be the slot on either side of the fob case. Begin with one side of the case and move around with a tape-wrapped screwdriver. Gently tear apart the two halves before putting them aside. Now you'll have a clear picture of the battery on the key fob and can therefore replace it. Be careful not to damage the ring of rubber that the battery is placed on. Once the battery has been replaced, you can put it back into the case and enjoy your new key fob! You can locate replacement batteries at many stores that sell batteries. Find a CR2025 coin cell battery. These batteries are often used in calculators and watches, but can also be found in auto parts stores and online. mazda cx-5 replacement key uk G28CarKeys 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 suddenly stops and then it's possible that it's the remote keyless receiver module. It is more likely to occur when the internal chip of the key fob has been damaged. This may be due to various factors, such as a dropped key or exposure to water. Fortunately the key fob's digital chips are protected by rubber seals and will be fine with splashes of water. However, submerging it in ocean or pool water is a much more serious problem because the highly conductive nature of salt can harm the electronics. If your key fob will not function, you might need an upgrade to the battery. There's a range of third-party batteries on internet. However, it's important to be aware that they may not work with your Mazda 3. It is best to purchase from a dealer to ensure that it works with your Mazda 3. After you've replaced the battery the key fob should be functioning again. If the remote doesn't respond when you press the lock button, it's likely that the key has been stuck in power saving mode. To remove it from this mode it's necessary to press the lock button five times and hold it until the red light appears. Reprogramming the key Mazda's keyless entry system enables you to open the door and start it up without the requirement for an ordinary key. It's an excellent convenience, however the process of reprogramming your remote or key can be confusing for a few people. It also requires a machine that only the dealer or automotive locksmith has access to. 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 ensure that you have at least two working keys for the Mazda. The next step is the reprogramming of a spare key. Initially, the functions of the new FOB are suspended to protect the vehicle from theft. After you've reprogrammed your new key, you'll be able to activate these functions again. After that, you are able to use the new key to unlock the doors and then start the engine. Try it out to make sure it is working. Keep a spare set keys around if you are worried about losing your keys. It is easy to add a spare Mazda key. You can save money by following these easy steps. This will also help you avoid an expensive towing bill and will also save money on a spare key.