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How to Fix Common Mazda 3 Key Problems The Mazda 3 is an elegant compact car with a classy interior and a responsive handling. It's also a good bargain compared to other compacts available. It can be a real trouble to lose keys. It can be expensive to replace keys that are lost, and also transporting your vehicle to the dealer for reprogramming your key. Key not locking or unlocking doors It is dangerous leaving doors unlocked especially when the vehicle is in motion. If the door is unlocked when the vehicle is in motion, passengers may fall out or sustain injuries. Keep the keys out of reach of children to avoid this problem. Children might find them fascinating and may play with them, which can cause the power windows or other controls to work or even cause the car to move. If you notice that your key fob isn't locking or unlocking doors, it is likely that the battery is dead. The button cell battery in the key fob has a restricted time span, so it's vital to replace it regularly. A good battery can last between two and four years. When replacing the battery, it is essential to use a battery with the same size and voltage as the one that was originally. A problem with key pairing could be the cause for your key fob not working. It is possible that the keyfob was not properly associated with the vehicle when it was purchased. In this case the key fob will need to be reprogrammed by the dealership. This can be done in under an hour. The dealer can also reset any residual electricity remaining in the computer on board. This will not solve the issue with your key fob's inability lock or unlock doors. Dead coin battery If your key fob is not turning on or unlocking your car, it could be due to the battery being dead. This is a common problem however, it is easily solved. You can replace your battery on your own and avoid a trip to a dealership. mazda demio key g28carkeys.co.uk is simple and requires only two tools. First, press the auxiliary key button on the back of your Mazda flip key. This will let you remove the metal auxiliary keys. After the auxiliary key made of metal is removed, you'll see a slot on either side of the fob case. Begin with one side of the case and move around with a tape-wrapped screwdriver. Gently pull the two parts of the case and put them aside. You can now replace the battery in the key fob. It is important not to damage the rubber ring that the battery is positioned. Once the battery has been replaced, you can reassemble the case and take pleasure in your new key fob! You can purchase a replacement battery at most stores that sell batteries. Find a CR2025 coin cell battery. These batteries are usually used in calculators and watches however they can also be found at auto parts stores as well as online. It's simple and fast to replace the battery in your Mazda 3. This will save you money and avoid the hassle of a visit to a dealer. Key Pairing Problem If your Mazda 3 has been working for a few days and then suddenly stops it could be because of the remote keyless receiver module. This is more likely to occur in the event that the internal chip on the key fob is damaged. This could be due to several factors, like a dropped or wet key. The key fob's electronic components are protected by rubber seals, therefore a raindrop should not damage them. However, submerging it into swimming pool or ocean water can be an issue that is much more severe because the highly conductive nature of salt can cause damage to the electronics. If your key fob will not work, you may require a new battery. There's a range of third-party battery options on the internet. It is important to keep in mind that these batteries might not be compatible with your Mazda 3. It's best to buy one from the dealership and ensure that it's guaranteed to work for your vehicle. Once you've replaced the battery the key fob should be functioning again. However, if your remote isn't responding when you press the lock button, the key is likely in power-saving mode. To get it out of this mode, you'll need to press the button five times and then hold it down until the red light flashes. Reprogramming an encryption key The keyless entry system that comes with the Mazda allows you to unlock and start the car without using the regular key. It's an excellent convenience, however the process of programming the remote or the key can be confusing for a few people. This requires a machine that is only available to the locksmith for your car or dealer. The machine is connected the computer in the vehicle and begins the programming process for the new key or remote. The first step is to ensure that you have at least two functioning keys for the Mazda. Then you can move on to the reprogramming process of a spare key. Initially, the functions of the new FOB are suspended to protect the vehicle from theft. Once you have reprogrammed your new key, these functions can be activated once more. After that, you will be able to use the new key to open the doors and then start the engine. You should test it first to verify that it functions. If you're worried about losing your keys, it is recommended to keep a spare one in your possession. It is simple to add an extra Mazda key. Just follow these steps and save a lot of money by not having to pay the dealership to do it for you. This will save you money on towing costs and a spare key.