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What Can a Smart Car Key Fob Do For You? Also known as fobs, keyless entry or smart keys, they were introduced by Mercedes in 1998. Key fobs that are controlled by computers perform a variety of functions, including locking and unlocking a vehicle and even starting it. They transmit an encrypted and rolling message. This makes them more resistant to tech-savvy thieves. Safety A smart key fob continuously communicates with a vehicle, by radiofrequency waves. It transmits a low-power signal that, when pressed, tells the car to unlock doors and start the engine. The car is programmed to recognize the unique encryption code of a particular key fob. This means that even if the key fob is stolen, it can't be used to start the car. A new vulnerability allows thieves to take advantage of this method of communication. Relay attacks are based on devices that transmit at the same frequency as the key fob. A thief can place one of these gadgets in a pocket or a hiding spot to jam the lock command from a distance, says How Stuff Works Electronics. This is a risk that is likely to become more prevalent as more and more drivers adopt smart keys. A smart key fob is not just a security feature but it can simplify your life by automatically taking care of the needs of your vehicle. A key fob that connects to your smartphone, for example can detect your presence and then unlock the doors, meaning you do not have to hit the remote button. It also can detect when you're leaving and automatically lock the car, so you don't have to fret about not locking the doors. A majority of smart key fobs have a battery indicator which warns you when the battery is low. Most models allow you to replace the battery quickly and easily, without any tools or equipment required. Convenience Smart keys do not have to be inserted physically into an ignition slot to unlock or start the vehicle. Rather, the driver simply must have it on them and bring it within range of the vehicle, as described by the BMW Group. In reality, some smart keys, such as the Display Key, come with an extremely small LCD touchscreen that enables users to access features such as locking and unlocking, as well as keyless start right from their key fob, without needing to connect to the car's Bluetooth system. Another way a smart key can save drivers time is by automatizing the process of locking their car doors after they leave. Consumer Reports says that this feature is present on a variety of vehicles. It can also make it easier for drivers to maneuver into tight spots without accidentally squeezing the door or something else. Additionally, smart key systems typically do not send the same frequency signal repeatedly in order to make them more vulnerable to relay attacks, according to Open Road Auto Group. Therefore a stolen vehicle can't be wired hot if it's equipped with a smart key since the encrypted signal that the key fob transmits is unique to each vehicle. This technology makes it extremely difficult for thieves to steal cars. Security Some of the high-tech electronic features that are present in modern automobiles can be found in the key fob. These devices do more than lock and unlock doors, or make chirping sounds that assist motorists in finding their car in a parking lot, but some owners may not be aware of everything the things these smart key fobs do. For example, some smart keys can activate the auto windows of a car and sunroof once they are activated. A Auto editor of CR once walked out to her Honda Accord only to find all the windows closed and the sunroof up. smart key for cars 's just one reason she was grateful for her Smart Key, which locked the car automatically. Some smart keys use computer-encrypted signals to thwart car burglars, according to How Stuff Works. This technology prevents hotwiring, which is when thieves steal the vehicle's engine control module (ECM), that is usually located on the front of the engine block. The ECM regulates a variety of vital functions including engine power, transmission control, and more. Smart keys also include anti-theft codes, as well as an unique security code for ID assigned to each key. This could disable the ignition when the wrong key is used. The security ID is a special code that is sent from the ECM to the key once it's put into the ignition. It is then confirmed by a device inside the car. Maintenance A smart car key fob can do much more than unlock your door. It can start your engine, and also activate the suspension and brakes remotely. It also can provide details about your vehicle, like fuel level and oil temperature. A smart car key fob, just like any other electronic device requires regular maintenance to function correctly. The majority of modern key fobs have indicators for batteries that inform the driver when the battery is low. It's simple to replace the battery, and you don't need special tools. In some instances the smart key may stop working completely. If you suspect that this is the case, try to reset it by getting out of the vehicle and then returning inside. This will help the car recognize that the fob is still in place and allow it to be functional again. Contact a locksmith if you are unable to get your key fob to function. They can reprogram your fob so that it can be recognized by the car and you are able to use all of its features. This is usually cheaper than buying a new fob and could save you money over time. In some cases the locksmith may modify an existing fob to be used to make a new key. This can save you even more money in the end.