Mini Key Fob Replacement
Key fobs today do more than just unlock and start your vehicle. They can also control the sunroof and even the windows. Therefore, they are costly to replace if they are damaged or lost.
It's possible to change the fob battery yourself and save money. Here's how to do it begin by finding a notch or latch on the key fob case and then insert the tool.
Battery
Modern key fobs are packed with features and convenience, but they require a bit of care to ensure they continue working well. Over time, the battery in your key fob will run out of power and will need to be replaced. You'll know that it's time replace the battery if your car becomes more difficult to start or when your buttons stop working.
Switching the battery on your key fob is fairly easy. Place the key fob flat on a flat surface and press the metal buttons until they pop out. Use a flat-blade screwdriver, or your fingernail for gently prying out the two halves.
Then, take off the clips that hold the battery in place. If your key fob comes with a slot to hold the battery, replace it with the new one, ensuring that you insert it in the correct plus and direction.
You'll need a CR 2032 3V coin cell battery, which is available in most stores that sell batteries, or online. The battery is usually small discs that have a plus or minus symbol on it. When handling the battery, be cautious because it could leak when your hands are filthy. The leakage can damage circuit boards which will make them less likely to function properly in the future.

Programming
Today's car key fob does more than just unlock and begin the car, it's also remote control for many systems. This includes adjusting the position of your mirror and seat, setting your radio and climate control preferences in addition to many others that are tailored to the demands of the driver. Unfortunately these smart key fobs also have the potential to malfunction due to many causes. Sometimes, simply replacing the battery inside the fob's battery will be enough, but other times changing the fob's program may be necessary.
Reprogramming the key fob of your car doesn't need to be difficult and can be done from the comfort of your home or at work. First, secure your vehicle and make sure that the keys are inside. 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.
Then, take the backup ignition key made of metal from your fob and put it aside in a secure location. You can push the fob's back cover towards its center to give it a slight lift to let you remove it. Replace the fob's key by using an upgraded CR2032 battery which can be purchased at our Golden Valley parts section or at local hardware stores and supermarkets in Minnetonka and St Louis Park.
Keyless Entry
Modern key fobs come with many advantages, ranging from convenience to security. The fob can be used to unlock the doors and trunk of your car by pressing a button that transmits radio frequency signals a receiver in your vehicle. This system is not without its disadvantages.
For example, some thieves have created devices that can intercept signals from your key and replicate them to use as an "key" to open your car and start it. You can secure yourself by placing your key fob in a shielded case (also known as Faraday pouches), which limits the distance over which frequencies sent by the fob can be transmitted. The pouches are sold at most auto parts shops for less than PS10.
Certain systems also allow you to unlock the car without pressing the button. The car will automatically lock or unlock when you get close to the door handle, as that your key is within the fob and in the range of the car's sensor.
Key fobs can also help business owners and managers to have greater control. They can grant specific employees to gain access to certain areas in your building or facility during specific hours of operation. By a single click and you can deactivate access for a lost employee or dismissal. This is an especially useful tool for warehouses and other buildings that require higher levels of security.
Calling
Many of the newer key fobs have hidden functions that simplify life for car owners. For instance one CR auto editor once went to his Honda Accord and saw all the windows had automatically rolled down when it was in his purse at home. This isn't ideal especially if you're driving in a snowstorm or rainstorm.
The Model 3's keys have many other awesome features, such as the ability to summon and automatically park the vehicle via a push of the button. Another feature that is quite unique is the panic button, which a driver can push during a terrifying situation, such as when a burglar enters the home. This could scare off the burglar and alert neighbors, says an official Tesla spokesperson.
By using a key fob substitute and replace the battery with a brand new CR 2032 battery (available at local hardware stores and big-box retailers). Install the bottom cover of the key fob, and press it until you hear snap. You can test the functions of the fob by opening and closing your car.
Having a duplicate key fob is useful because you can give it to a friend or family member so they can use the car with their own Driver Profile that shows their preferred settings. keyless , you don't have to worry about a friend or sibling accidentally altering the position of the mirror, climate control settings, or seat positions that you prefer.