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Changing the Battery in Your Mini Key Fob The key fob makes it easy to lock and unlock your vehicle from the distance. It also allows you to activate the panic button on your vehicle to deter break-ins. If your fob stops working, it can be fixed with a few easy steps. Ensure that the battery is new. Then, remove it from the ignition by pressing the lock button three times quickly. Battery The battery you use in your key fob is among the easiest solutions. The device uses a small coin-shaped 3V battery (CR2032 or CR2025) that is usually easy to find in general stores or home improvement stores and some auto parts stores. Use a brand new battery. Old batteries can harm the circuit boards and are no longer useful. Start by prying the fob open. It may be necessary to make use of a flat screwdriver to split the two halves. Install the screwdriver into the seams on both sides of the fob and lift the clips which hold it in place. They are easily broken, so be careful and work slowly. Reassemble the fob after replacing the battery, and examine it to determine if the device does what it is supposed to. If it's not working Try pressing the button several times and checking whether the contacts are clean. You could also try it with a spare fob to see if the problem is specific to your key. If not, there could be another reason for the key fob to not function. It could be a worn button, for instance. This will only cause the button to function occasionally, not every time. Interference The key fob uses tiny transmitters to transmit an audio signal that is short-range to a device in your car. Its primary function is to permit your car to recognize the key fob and open its doors when you are near it, and then turn on when you press the ignition button. Interference can occasionally interfere with communication. If you charge your second-generation Apple Pencil while holding the fob (via iGeneration), it could prevent you from unlocking the vehicle. Other electronic devices that utilize the same frequency as the fob can also interfere with its signal. This can include garage door openers as well as tire-pressure monitoring systems. It is also possible that an RF receiver inside your home might be interfering with the fob's signal, however, this is difficult to diagnose without the assistance of a qualified test. Your key fob might need to be reprogrammed. The transmitter inside your key fob must be recognized by the Mini's receiver. A unique code is used for each pairing. Fobs typically need to be changed when they're removed or replaced, or when you buy a new one or, in rare cases, when a battery is changed. Follow the directions in the owner's manual to program a key fob, or ask a dealer for help. Faulty chip Modern electronic key fobs provide convenience and performance over traditional manual keys, but they are also more susceptible to being damaged. One of the most frequent issues is a damaged chip that can stop the fob from functioning properly. This is usually a straightforward fix. If your car key fob fails to turn on, it could be a sign of a faulty chip. The problem can usually be fixed by replacing the battery which is cheap and easy to find at an hardware store or big-box retailer. To avoid any further issues make sure to purchase the right battery with your car model. The fob should not be exposed to water, or soapy residue. Water will often cause corrosion, which can interfere with the circuit board. If this is the case, you will need to clean it by using isopropyl or electronic cleaner before putting in the new battery. After the old battery has been replaced, it is a good idea to test the fob's function before driving the vehicle. Examine the voltage of new battery using an voltmeter and make sure it is secure. If mini cooper replacement keys may be required to replace the entire chip inside the remote. A certified dealer technician will assist you in determining the best solution for your vehicle. Reprogramming We offer a replacement slim key fob to replace the old key fob. It works the same as the original one, and complete fitting instructions are included with every purchase. We also provide an online customer support line. Often, the mini key fob can malfunction or cease to function completely. It can be caused by numerous reasons, and can be frustrating as the car won't start and you're forced to wait to be able to drive again. However, reprogramming the key fob might be the solution and it is easy to accomplish. First, make sure the battery inside the key fob is functional and hasn't had to be replaced. After a new battery has been installed it cannot be reprogrammed and would have to be replaced. Once the key fob has been programmed it will then be able to communicate with the car and control all of its functions like the radio, air conditioning and even the sunroof and windows. It is also able to activate the comfort access feature that means that the driver's door will unlock and close automatically when you enter the vehicle or the seats be able to move up and down to get you in and out. The key fob can adjust the mirrors, the radio and the temperature control settings according to your preference.