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How to Fix Common Mazda 3 Key Problems The Mazda 3 is an elegant compact car with a premium interior and a nimble handling. It's also a great deal cheaper than many other compacts on the market. Lost keys can be a major troublesome. It can be costly to replace spare keys and also transporting your vehicle to the dealer to re-program your key. The key cannot lock or unlock the door It's dangerous to leave the doors unlocked, especially when the vehicle is moving. If the door is opened when the vehicle is moving it could cause passengers to fall out or be injured. Keep keys out of the reach of children to avoid this problem. Children may fi nd them interesting and play with them, which can cause the power windows or other controls to function or even cause the car to move. If you notice that your key fob is not locking or unlocking the doors, it could mean that the battery is dead. The button-cell battery on the key fob has a short lifespan, which is why it is essential to replace it regularly. A quality battery is expected to last between two and three years. When replacing mazda smart key replacement , it is important to use a battery with the same voltage and size as the original one. Another reason that the key fob might not be working is a key pairing issue. It's possible that the keyfob wasn't properly connected to the vehicle at the time it was purchased. In this scenario the dealer needs to reprogramme it. Fortunately it can be done in under a minute. The dealership can also reset the on-board computer to remove any remaining electricity. This won't fix the problem with your key fob's ability to lock or unlock doors. Dead coin battery If your key fob is not activating or unlocking your car, it could be because the battery is dead. It's a frequent issue, but one that is able to be solved. You can replace your battery at home and avoid having to visit a dealer. The procedure is simple and requires only two tools. First first, press the auxiliary button on the back of your 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 see the slot on either side of the fob case. Make use of a tape-wrapped flathead screwdriver to open the case, beginning with one side, and then the opposite. Gently tear apart the two halves before putting them aside. You can now replace the battery of your key fob. Be careful not to damage the small rubber ring the battery is placed on. When the battery is replaced, you can put it back into the case and take pleasure in your new key fob! The majority of stores selling batteries will have a spare battery. Look for a CR2025 coin cell battery. These batteries are usually used in calculators and watches however they can also be found in auto parts stores or online. It's easy and quick to change the battery in your Mazda 3. This will save you money and avoid a dealership visit. Key pairing issue If your Mazda 3 has been working for a while but suddenly stops, it could be the remote keyless receiver module. This is especially true when the key fob's internal chip is damaged. This could be the result of many reasons, including dropping the key or exposure to water. The key fob's electronic components are protected by rubber seals therefore a raindrop is unlikely to cause harm. However, submerging it in swimming pool or ocean water can be an even more serious issue because the highly conductive nature of salt can cause damage to the electronics. If your key fob doesn't working, you're likely in need of a new battery. You can locate a variety of third-party batteries available on the internet. However, it's crucial to remember that they may not be compatible with your Mazda 3. It's a good idea to purchase one from a dealership and ensure that it's 100% guaranteed to work with your vehicle. After you've replaced your battery the key fob should function again. However, if the remote isn't responding when press the lock button, it is likely stuck in power-saving mode. Press the lock button five times and hold it for a while until the red light appears. Reprogramming a key Mazda's keyless entry system allows you to unlock the car and start it up without the requirement of a traditional key. This is a wonderful convenience however, the process of reprogramming your remote or key might be difficult for some. It also requires a machine that only the dealer or an automotive locksmith can access. 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 minimum two keys that work for the Mazda. The next step is the reprogramming of a spare key. The functions of the new FOB will be temporarily disabled to safeguard the vehicle from theft. Once you've resettled the 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 works. Keep a spare set keys if you're worried about losing your keys. It is simple to add the spare Mazda key. Follow these steps and you'll save a considerable amount of money by not having to pay the dealership to do it for you. This can also save you from a costly tow bill and will also save money on a new spare key.