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mini car keys fobs today have more to offer than unlock and start the vehicle. They also control the sunroof and even the windows. They are also costly to replace in the event that you lose them or damage them. It is possible to replace the fob battery on your own and save money. Here's how Start by locating a notch or latch on the fob's key case and then inserting your tool. Battery Modern key fobs offer amazing functionality and convenience, but they require a bit of care to ensure they continue working well. Over time the battery inside the fob's battery will wear out and you'll need to replace it. When your car is harder to start or the buttons stop working, you'll know that it's time to replace the battery. The process of replacing the battery in your key fob is easy. First put the key fob on a flat surface and press the metal button until it pops open. Find the seam that connects the lid and base of the fob. You can then employ a small screwdriver with a flat blade (or sometimes, even your fingernail) to push the two halves in a gentle manner. Then lift the clips that secure the battery and remove it. If your key fob has a slot for the battery, simply replace it with a new one, making sure you insert it in the correct plus and direction. You'll need a CR 2032 3V coin cell battery that is readily available in all stores that sell batteries or online. The battery is usually designed like a disc that has the symbol of a plus and minus printed on it. When handling the battery, you must be careful since it could leak if your hands are dirty. Leaks can harm the circuit board, making it less likely to function properly in the future. Programming The car key fob of today is more than a remote for the vehicle. It's also an instrument that can be used to control different systems. This includes adjusting the position of your mirror and seat, setting your radio's preferences and climate control in addition to many others adapted to the driver's needs. Unfortunately, these smart key fobs are also prone to get messed up from a number of causes. Sometimes, simply replacing the battery inside the key fob will do the trick Sometimes, changing the fob's program may be required. Reprogramming a key fob doesn't need to be difficult, and it can be done at the convenience of your home or work. First, lock your car and make sure that the keys are in the vehicle. Press and hold the “Unlock” and “Lock” buttons on your new key fob at the same time, until you hear a chime, or the locks cycle. This will reset the connection between your keyfob's and vehicle. Remove the backup metal key from your fob. Place it in a safe place. You can push the back cover of your fob toward its center to give it a slight lift and allow you to take it off. Replace the fob's key by using an upgraded CR2032 battery which you can buy from our Golden Valley parts section or at local hardware stores as well as supermarkets in Minnetonka and St Louis Park. Keyless Entry Modern key fobs can provide a range of advantages, from convenience to security. The fob can be used to open the trunk and doors of your car by pressing a button which transmits radio frequency signals the receiver inside your vehicle. The system does not come without its disadvantages. For instance, a few thieves have created devices that can take the signals from your key and replicate them to function as a “key” to open your car and start it. You can help protect yourself by putting your key fob in a case that is shielded (known as Faraday pouches) which limit the distance frequencies emitted from the fob's location. These pouches can be found at most auto parts shops for less than PS10. Additionally, certain systems permit you to enter the car without having to press the push button. The vehicle will automatically lock or unlock when you step up to the door's handle as long as your key is inside the fob and within the range of the car's sensors. Key fobs also offer greater control for managers and business owners they can authorize access to certain areas of your facility or building to specific employees during scheduled shift hours. With just a click and you can deactivate access to an employee or terminate them. This is an especially useful option for warehouses or other structures that require greater levels of security. Summoning Many newer key fobs feature hidden functions that can make the life of a car owner more convenient. For instance, a CR auto editor once walked out to his Honda Accord and saw all the windows had automatically rolled down while it was sitting in his purse at home. This isn't ideal, particularly if you are driving through a snowstorm rainstorm. The Model 3's key fob comes with numerous other interesting features, such as the ability to summon or auto-park the vehicle with a single push of the button. Another cool feature is the panic button which drivers can press during a terrifying situation, such as when a burglar is in the home. This could scare off the criminal and help to notify neighbors, according to a Tesla spokesperson. By using a key fob substitute and replace the battery with a new CR 2032 battery (available at local hardware stores and big-box retailers). After that, you can reinstall the key fob's lower cover and press it down until you hear a snap. You can test the functions of the fob by unlocking and closing your car. A duplicate key fob may also be beneficial to gift to a family member or friend in order to let them use their own Driver profile using the settings they prefer. This means you don't have to worry about a friend or sibling accidentally changing the position of the mirror or the temperature control settings or the seat position you prefer.