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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 is also a great bargain compared to other compacts available. It can be a huge pain to lose keys. It can be costly to replace keys that are lost, as well as taking your vehicle to the dealer to reprogram your key. Keys not locking or unlocking the doors If doors are not locked, it can be extremely dangerous, particularly if the vehicle is moving. If the door is unlocked when the vehicle is in motion passengers could fall out or sustain injuries. Keep the keys out of reach of children to avoid this. Children may fi nd them appealing and may want to play with them, which can cause the power windows or other controls to be activated or even cause the car to move. If you notice that the key fob isn't locking or unlocking the doors, it probably means that the battery is dead. The button-cell battery inside the keyfob has a limited life span, therefore you should replace it regularly. A good battery is expected to last between two and three years. When replacing the battery, it is essential to use a battery with the same voltage and size as the one that was originally. A problem with key pairing could be the cause for your key fob not working. It's possible that the keyfob wasn't properly linked to the vehicle when it was purchased. In this instance the dealer needs to reprogram it. Fortunately this can be accomplished in just a few minutes. The dealership can also reset the onboard computer to eliminate any remaining electric current. However, this will not alter the key fob's capability to lock or unlock the doors. Dead coin battery It's possible that the battery is dead if the key fob doesn't turn on or unlock your car. This is a frequent issue however, it is easily fixed. You can replace your battery on your own and avoid a trip to a dealership. The procedure is simple and requires only a few simple tools. Then first, press the auxiliary button on the back of your Mazda flip key. This will open the auxiliary metal key, allowing you to remove it. There is an opening on both sides of the case after the auxiliary's metal is removed. Begin with one side of the case and work your way around using a tape-wrapped screwdriver. Gently pry the two halves of the case apart and put them aside. Now you'll have a clear picture of the battery in the key fob which means you can replace it. You don't want damage to the rubber ring on which the battery is fixed. Once the battery is replaced, you can put it back into the case and take pleasure in your new key fob! You can buy an alternative battery in most stores that sell batteries. Look up a CR2025 battery. These batteries are used primarily in calculators and watches, however, they can also be found at auto parts stores, or online. Changing the battery in your Mazda 3 is easy and fast, and will save you money when you go to the dealer. Key Pairing Problem If your Mazda 3 has been working for a while but suddenly stops it could be because of the remote keyless receiver module. This can happen when the chip inside the key fob has been damaged. It could be caused by several reasons, like dropping the key or being exposed to water. The key fob's electronics are protected by rubber seals, so a splash of rain should not damage them. However, submerging it into ocean or pool water is the most serious risk because the highly conductive nature of salt can cause damage to the electronics. If your key fob does not work, you may require a new battery. You can locate a variety of third-party batteries available on the internet. However, it's crucial to be aware that they may not be compatible with your Mazda 3. It's best to purchase one from a dealer and make sure it's 100% guaranteed to work with your vehicle. After replacing the battery the key fob will function again. If the remote isn't responding when press the lock button, it is likely to be in power-saving mode. Press mazda 3 car keys , and hold it until the red light appears. Reprogramming the key The keyless entry system of the Mazda allows you to unlock and start the car without the standard key. It's a great convenience but the process to reprogramme the remote or the key can be a bit confusing for some. It also requires a special machine that only the dealer or an automotive locksmith has access to. This machine is connected to the computer in the vehicle, and it begins the programming procedure for the new key or remote. The first step is to ensure that you have at minimum two keys that are compatible 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 turned off to protect the vehicle from theft. After you've reprogrammed the key, you can activate these functions in the future. After that, you can use the new key to open the doors and start the engine. You should first test it to verify that it functions. Keep a spare set of keys in case you are worried about losing your keys. Making a spare key for your Mazda is a relatively simple procedure. You can save money by following these simple steps. This can also save you from an expensive towing bill, as well as saving money on a spare key.