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What is a Smart Key Car Key? Sometimes referred to as keys that are in proximity, key fobs or remote keys, smart keys work to unlock doors and start engines without needing to insert a physical key. They communicate with each other by using radiofrequency signals. This helps keep vehicles safe by not allowing hotwiring. Smart keys transmit unique encrypted signals that prevent them from being used by other vehicles. Convenience Rather than having to insert keys into an ignition slot to lock and unlock your vehicle by merely touching the handle on your door or trunk. Modern cars often include a feature that permits you to start your car from a distance. This is especially useful for those who are bringing groceries into the vehicle or transporting equipment, passengers, or passengers. This technology is designed to help protect against theft of vehicles. Instead of sending one frequency signal like a regular key fob, a smart key sends out a series of encrypted signals to a car's embedded antennas as you come close to it. This stops other vehicles from being able to receive and respond to the same signal, which explains how Stuff Works Electronics. In addition, some manufacturers incorporate a computer chip into the vehicle to recognize the unique fingerprints of each key, which helps ensure that only authorized drivers use it. This can be helpful when you loan your car to friends and family members. Some smart keys can also store user preferences, allowing mirrors, seats and steering wheel adjustments, as and stereo presets can be automatically set when the key is within the range of the vehicle. Some smart keys may also be programmed to stop the vehicle from crossing the speed limit when the key is used to start it. This can help keep unexperienced drivers safe and is beneficial if you have young children in the back of the vehicle. Security Traditionally keys were made of metal to open the ignition. With the advent of smart key technology it is no longer the case. Smart keys come with an electronic chip that transmits signals to your car's antenna. The vehicle recognizes this signal when the driver presses on the trunk release or door handle. This means that it's impossible to lock your keys inside your car anymore. The signal sent by the smart key to your vehicle is encrypted, ensuring that only you have access to it. In addition, many models will stop the engine if the car was not started within the last few minutes. This feature is particularly useful when you're in a risky location or need to get out of the vehicle for any reason, such as at a gas pump. Furthermore, if the smart key battery is depleted during a ride, many models have a backup system of opening and starting the vehicle. The backup method involves putting the key into a slot, or holding it close to a specific area in the cockpit in which energy is transferred to an electric motor. Certain manufacturers have a mechanical key blade that can be utilized in a situation of emergency to open the trunk or to start the vehicle. Battery Life Many newer cars have keyless entry systems as well as push-button starters. These are controlled by a smart key fob that communicates with your car using proximity technology. These systems use a tiny transmitter, powered by a coin-sized lithium battery. It will eventually require to be replaced just like any other battery. Most smart key fob batteries last several years however that doesn't mean they can't go out of power and stop working at any time. A dead key fob means that it isn't able to unlock or start the car even if you keep it near the front door and the key fob light flashes. It is not unusual for the transmitter of a smart key to drain the battery. The smart key emits a signal every when you press the button. However, most of the time, it doesn't do anything. One single lock/unlock button takes only a tiny amount of the fob's battery which means that there's many years of signals' worth of battery life left in the average smart key battery. The fob will also drain the battery if you keep it close to other devices that emit electromagnetic fields, such as phones and computers. These devices produce their own magnetic field, which can affect the fob's transmitter, causing it to function slower. In some cases the fob might be unable to function when the fob is placed too close to these devices, as per RepairPal. Maintenance Smart keys differ from traditional metal keys by using technology to control the locks of your vehicle and perform other functions. It works by transmitting a signal to antennas that are placed both inside and outside your vehicle. They detect the fob's presence and communicate with the car's computer. The car interprets the signal, allowing you to start or open it without a physical key. New cars are loaded with advanced electronic features, and the fob is now a hub for many of these functions. The most obvious uses are locking and unlocking your vehicle, remote starting and chirping sound to help you locate your car in a parking lot. Some fobs let you store specific settings for various drivers and remotely open windows and sunroofs. smart car key is an intricate electronic device that includes an integrated circuit board that can be damaged if placed in a position that is too harsh or exposed to extreme heat or cold. The transmitter can break in the event of it being hit or dropped or smashed. The contacts on the battery can become bent. These problems can be difficult to identify and fix. You can try using your phone to avoid the problem and see if that helps, but it's always a good idea to keep a backup key in your pocket to use in case. You can purchase an ordinary smart key replacement that's up to 70 percent less than OEM keys and comes with a 3-year warranty.