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How to Fix Common Mazda 3 Key Problems The Mazda 3 is an elegant compact car that features a luxurious interior and agile handling. It's also an excellent value when compared to other compact cars available. It's a major problem to lose keys. Not only will you'll have to pay the dealer to tow your car and reprogramme your key as well, but it could also cost you money to replace the spare keys. The key is not able to lock or unlock the door It's dangerous to leave doors unlocked, especially when the vehicle is in motion. If the door is unlocked while the vehicle is in motion, passengers may fall out or suffer injuries. Keep keys out of the reach of children to avoid this. Children might find them fascinating and play around with them. This could cause the power window or other controls to malfunction and even move the vehicle. If you notice that the key fob is not locking or unlocking the doors, it's likely that the battery is dead. The button-cell battery inside the key fob has a finite life span, so you should replace it regularly. A quality battery should last between two and four years. When replacing the battery, it is crucial to choose a battery with the same voltage and size as the one that was originally. Another reason for why the key fob may not be working is a key pairing problem. It is possible that the key fob was not connected properly with the vehicle when it was first purchased. In this scenario the key fob will need to be reset by the dealer. Fortunately this can be accomplished in less than a minute. The dealer can also reset the on-board computer to eliminate any remaining electrical charge. 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 your key fob isn't turning on or unlock your vehicle. It's a frequent issue, however, it can be fixed. You can replace the battery on your own, avoiding a trip to the dealership. The procedure is simple and requires just the use of a few 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. You'll see an opening on both sides of the case after the metal auxiliary is removed. Begin with one side of the case and work your way around using a tape-wrapped screwdriver. Gently pry the two parts of the case and place them aside. You can now change the battery on your key fob. Be careful not to damage the small rubber ring the battery sits on. When the battery is replaced, you can reassemble the case and enjoy your new key fob! You can find an alternative battery in most stores that sell batteries. Look for a CR2025 battery. These batteries are used primarily in calculators and watches, but they can also purchased at auto parts stores or on the internet. It's easy and quick to change the battery in your Mazda 3. This will save you money and avoid having to visit a dealership. Key Pairing Issue If you've been driving your Mazda 3 for a long time and suddenly it stopped working, there could be a problem with the remote keyless system receiver module. This could happen in the event that the internal chip on the key fob is damaged. This may be due to a number of factors, such as an accidental drop of the key or exposure to water. Fortunately the key fob's electronics chips are protected by rubber seals and should be fine even with a splash of water. However, submerging it into ocean or pool water is an issue that is much more severe due to the highly conductivity of salt may cause damage to the electronic components. If your key fob does not work, you may need an upgrade to the battery. A quick search on internet will reveal that there are many third-party replacement batteries. But, it's important to keep in mind that they might not work with your Mazda 3. It is best to purchase it from the dealer to ensure that it will work with your Mazda 3. After replacing the battery your key fob should be functioning 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. Press the lock button 5 times and hold it for a while until the red light blinks. Reprogramming an encryption key Mazda's keyless entry system allows you to unlock your car and start it without the requirement for an ordinary key. This is a wonderful convenience however, the process of programming the key or remote may seem difficult for some. This also requires a machine that is only available to the locksmith for your car or dealer. This machine is connected to the car's computer and then begins the process of programming for an entirely new remote or key. The first thing to do is have at least two keys that work for the Mazda. Then you can move on to the reprogramming of a spare key. Initially the functions of the new FOB are turned off to safeguard the vehicle from theft. Once you've resettled the new key, you'll be able to activate these functions and again. 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 around if you are worried about losing your keys. mazda replacement key cost G28 to add an extra Mazda key. You can save money by following these simple steps. This will also help you avoid a costly tow bill and save money on a spare key.