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How to Fix Common Mazda 3 Key Problems The Mazda 3 is a stylish compact car that is agile in its handling and a luxurious interior. It is also a great bargain compared to other compacts on the market. Lost keys can be a real troublesome. It's not just that you have to pay the dealership to tow your car and reprogramme your keys and it could cost you money to replace the spare keys. The key will not lock or unlock the door. It is dangerous to leave the doors unlocked particularly when the vehicle is moving. If the door is opened when the vehicle is moving it could cause passengers to fall out or get injured. To avoid this risk be sure to keep your keys out of the reach of children. Children might find them intriguing and enjoy playing with them. This could cause the power window or other controls to work and even move the vehicle. If you notice that the key fob does not unlock or lock the doors, the battery could be dead. The button-cell battery in the keyfob has a limited life span, so you should replace it regularly. A quality battery should last between two and four years. When replacing the battery, it is important to use a battery with the same voltage and size as the original. A problem with key pairing could also be the reason behind your key fob not working. It is possible that the keyfob wasn't properly linked to the vehicle when it was purchased. In this instance the dealer needs to reprogram the key fob. Fortunately, this can be done in less than a minute. The dealership can also reset the onboard computer to remove any remaining electrical charge. However, this does not make the key fob more able to lock or unlock the doors. Dead coin battery If your key fob won't be activating or unlocking your car, it could be due to the battery being dead. It's a frequent issue, but it is one that can be fixed. You can replace the battery yourself, saving you having to visit a dealership. The process is simple and requires just a few tools. Press the auxiliary key button on the back of the Mazda flip key. This will open the metal auxiliary key and let you remove it. There is a slot on each side of the case after the auxiliary metal is removed. Start with one side of the case and work your way around with a tape-wrapped screwdriver. Gently pry apart the two halves and set them aside. You can now change the battery on your key fob. You don't want to harm the rubber ring on which the battery is mounted. After the battery has been replaced, you can put it back in your case and take pleasure in the new key fob. Most stores that sell batteries carry a replacement battery. Look for a CR2025 coin cell battery. www.g28carkeys.co.uk are commonly used in calculators and watches and can be found in auto parts stores and on the internet. The process of replacing the battery in your Mazda 3 is easy and quick, and can save you money when you travel to the dealer. Key pairing issue 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 particularly likely if the key fob's internal chip is damaged. This could be due to several reasons, like dropping the key or exposure to water. The electronic components of the key fob are protected by rubber seals therefore a raindrop should not damage them. The key fob's submersion in the ocean or in pool water could be a major issue because salty water is extremely conductive and could harm the electronic components. If your key fob will not function, you might need an upgrade to the battery. There's a range of third-party batteries on internet. However, it's important to keep in mind that they might not work with your Mazda 3. It's best to buy one from a dealer and ensure it is certain to work with your vehicle. After you've replaced your battery your key fob should function again. However, if your remote doesn't respond when you press the lock button, the key is likely in power-saving mode. Press the lock button five times, and hold it until the red light blinks. Reprogramming the key The keyless entry system on the Mazda allows you to unlock and start the car without the traditional key. It's a great benefit, but the process of reprogramming the key or remote may seem difficult for some. It also requires a machine that only the dealer or automotive locksmith has access to. This machine is connected the car's computer and initiates the programming procedure for the new key or remote. The first step is to ensure that you have at least two working keys for the Mazda. Then you can begin the reprogramming process of a spare key. Initially the functions of the new FOB are halted to protect the car from theft. After you've reprogrammed your new key, you can enable these functions and again. You can now utilize the new key to operate the ignition and also to open the doors. Make sure it is working. If you're worried about losing your keys, it's an excellent idea to keep a spare one in your possession. It's easy to add the spare Mazda key. Follow these steps and you'll be able to save a considerable amount of money, as you don't have to pay the dealership to do it for you. This will save you money on towing costs and a spare key.