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Changing the Battery in Your Mazda 3 Key Fob There's nothing more annoying than getting to your car after a long work day and discovering that the key fob battery is dead. Fortunately, this is an easy fix with an easy battery replacement at an hardware store or a big box retailer. A spare key fob for your Mazda 3 is an inexpensive alternative to not having to take your vehicle to a dealership to have them re-program the keys. Battery Replacement Removing the battery from the Mazda 3 key fob is an easy procedure that you can perform at home. You should only replace it if the battery fails or you see a message reading “Low keyfob battery” on the multi-information display. Replace battery.” You'll need an flathead screwdriver along with tape and patience to open the case. Locate a notch or gap in the bottom portion of the metal of the Mazda 3's key fob, and insert the head of the screwdriver into it to break off the lower part. Repeat the process for the top piece of metal however, be careful not to scratch the rubber ring that is on the bottom of the case. When the fob case is opened, you'll notice a slot on either side of the case that houses the battery. Start on one side of the case and then gently push it open. Take out the old CR2025 and replace it with a new one, ensuring that you place it face-up to ensure proper orientation. Place the battery cap on again, and then attach both sides of your key fob case by pressing until they click. After replacing the battery, lock and unlock your doors to confirm whether the fob is working. If everything looks good the Mazda 3 remote features can be used again. Pairing Issues If your key fob has stopped working suddenly, this could indicate that the transmitter inside the car is damaged. mazda replacement key g28carkeys.co.uk is usually a job to a professional and you will need a new key fob. If you have tried replacing the battery and reprogramming the key fob, but isn't solving the issue, it is possible that the chip in the key fob could be faulty. This can happen when the key fob has been dropped on hard surfaces, exposed to salt water or even touched by dirty hands. You'll need to locate the small “key”, which is inserted into the seam, to remove the circuit board and diagnose the issue. Then, you will be able to look for any damage or corrosion on the chip. It is best to use a clean towel to ensure that the chip is not damaged. If you're unsure you are not sure, you can check the battery connector's terminals for cracks or breaks. If this is the case, carefully attaching them back will usually restore the function of the key fob. Also, you can check the buttons to determine whether they've been worn out or damaged. If the buttons are loose, they can easily be re-soldered in the event that the button is actually snapped off. Interference Signals There's nothing more frustrating than trying to start your car only to see the message “No Fob Detected”. It typically happens at most awkward moments, like when you are late for work or when you have to pick up children from school/daycare. The good news is that there are steps you can take to troubleshoot the issue and determine the cause. Interference signals can disrupt the remote key fob's signal to the vehicle which causes it to not work properly. This could be caused by things like weather conditions, buildings, and transmitters that operate on the same frequency. Interference could occur if your vehicle has aftermarket equipment that transmits at the same frequency as your key fob. The key fob might be damaged if exposed to salt water or water. The rubber seals on the electronic chip may be damaged by water, particularly if it is submerged for an extended period of time like in a pool or at the beach. The chip can stop working and require replacement of the keyfob. If you have a programable key cleaning the chip using isopropyl alcohol or an electronic cleaner to aid in its return to functionality. If this doesn't work then it's likely that the chip is fried and needs to be replaced. Locking/Unlocking of the Doors The buttons on the key fob transmit electronic signals to the solenoid inside the car. It transforms the signal into a mechanical action that locks and unlocks the doors. If your door lock doesn't work, it could be an issue with the solenoid. This requires experts from auto repair shops to examine. A dead battery of 12 volts can hinder the fob from functioning properly. This can occur if your battery loses its charge or if the contacts become damaged. The good news is that a new battery can resolve this issue in a matter of minutes. The receiver module may be the cause if the key fob does not function after you replace the battery or re-program the device. The device receives radio frequency signals from the key fob and interprets them to control the functions of the vehicle. If it fails it could be costly to repair. To check whether this is the case, begin by inserting your spare keys into the key slot and turning the ignition to ON. Press the key fob twice in 10 seconds, without removing it. The Mazda 3 system synchronizes the key to the vehicle and you can now use it as your primary remote for driving. You can program up to three keys in this way.