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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 deal cheaper than many other compacts available. Lost keys can cause a lot of issue. It is costly to replace keys that are lost, and transporting your vehicle to a dealer to reprogram your key. The key cannot lock or unlock the door. It is dangerous to leave doors unlocked especially when the vehicle is in motion. If the door is not locked while the vehicle is moving, passengers may fall out or sustain injuries. Keep keys out of reach of children to avoid this problem. Children might find them interesting and may play with them. This could cause the power window or other controls to work and even cause the vehicle to move. If you notice that the key fob doesn't lock or unlock the doors, the battery might be dead. The button cell battery inside the key fob has a restricted time span, so it's important to replace it regularly. A good battery will last between two and four years. It is important to replace the battery with a battery that has the same voltage and the same dimensions as the first. A key pairing issue could be the cause for your key fob not working. It is possible that the keyfob wasn't properly paired with the vehicle when it was purchased. In this scenario, the dealer will need to reprogram the key fob. This can be accomplished in under 30 seconds. The dealer can also reset any residual electricity remaining in the computer on board. This won't fix your key fob's failure to lock or unlock doors. Dead coin battery If your key fob isn't activating or unlocking your car, it could be due to the battery being dead. This is a common issue but one that can easily be repaired. You can replace the battery yourself, saving you going to the dealer. The procedure is simple and requires just a few tools. Press the auxiliary key button on the back of the Mazda flip key. This will allow you to remove the metal auxiliary keys. After the auxiliary key made of metal is removed, there will be a slot on either side of the fob case. Use a tape-wrapped flathead screwdriver pry open the case, starting with one side first and then the other. Gently pry the two sides of the case and place them aside. You can now replace the battery in the key fob. Be careful not to damage the small rubber ring the battery sits on. After the battery is replaced, you can put it back in your case and use the new key fob. Most stores that sell batteries will have a spare battery. Find a CR2025 coin cell battery. These batteries are used primarily in calculators and watches, but they can also be purchased from auto parts stores or online. Switching Going At this website in your Mazda 3 is easy and quick, and will save you money when you travel to the dealership. Key Pairing Problem If you've been driving your Mazda 3 for a long time and suddenly it stopped working, it may be a problem with the remote keyless system receiver module. This can happen in the event that the internal chip on the key fob is damaged. It can be caused by various factors like an unintentionally dropped or wet key. Fortunately the key fob's electronics chips are protected by rubber seals, and should be fine with a splash of water. The key fob's submersion in pool or ocean water can be a serious problem due to the fact that salty liquid is extremely conductive and could cause damage to the electronic components. If your key fob will not work, you may require a new battery. A quick search on internet will show that there are many third-party replacement batteries. However, it's crucial to remember that they may not work with your Mazda 3. It's a good idea purchase one from a dealership and ensure it is 100% guaranteed to work with your vehicle. Once you've replaced the battery, your key fob should be working again. However, if the remote isn't responding when you press the lock button, it is likely in power-saving mode. Press the lock button 5 times and hold it until the red light blinks. Reprogramming a key Mazda's keyless entry feature allows you to open the door and begin it without the need for a regular key. It's a great benefit however the process of reprogramming the remote or key may be difficult for some. It also requires a device that is available only to the auto locksmith or dealer. This machine is connected with the vehicle's computer, and it starts the programming process for the new key or remote. The first step is having at minimum two keys that are compatible for the Mazda. You can then proceed with reprogramming a spare key. The functions of the new FOB will be temporarily disabled to safeguard the vehicle from theft. After you've reprogrammed your new key, you can enable these functions once more. Then, you can use the new key to open the doors and start the engine. Try it out to make sure it works. If you're worried about losing the keys, it's recommended to keep a spare one in your possession. It is simple to add an extra Mazda key. You can save money by following these simple steps. This will save you money on a tow bill and an extra key.