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What is a Smart Key Car Key? Also known as keys for proximity as well as key fobs, remote keys, smart keys function to unlock doors and start engines without the driver having to insert an actual key. They communicate using radiofrequency signals. In addition, it helps keep cars secure by stopping hotwiring attempts. Smart keys emit unique encrypted signals that prevent access to other vehicles. Convenience You can lock and unlock your vehicle without the need to insert the key into the ignition slot. Simply tap the door handle or trunk. Many modern cars also include a feature that permits you to start your car wirelessly. This is especially helpful for those who are bringing groceries into the vehicle or transferring equipment and passengers. This technology is intended to prevent vehicle theft. Smart keys send out encrypted signals instead of a single frequency, like a normal keyfob. This prevents other cars from being able to receive and respond to the same signal, explaining how Stuff Works Electronics. Some manufacturers also include a computer chip inside the vehicle which recognizes the unique fingerprint of each key. This makes sure that only authorized users are using it. This is useful if you lend your car to family members or friends. Some smart keys also store user settings, ensuring that the seat, steering wheel mirror, seat and stereo presets are automatically set when the key is in the range of the vehicle. Some smart keys may also be set up to prevent the vehicle from exceeding the speed limit when it is started using that key. This can help keep unexperienced drivers safe and can be beneficial for families with young children in the back of the vehicle. Security Traditionally keys for cars have been made from metal and used to unlock the ignition. With the advent of smart key technology however, this is no longer required. Smart keys come with an electronic chip that transmits the signal to the car's antenna. The signal is then received by the vehicle whenever the driver presses on the handle on the door or trunk release. This means it's impossible to lock your keys in your car. The signal sent by the smart key to your vehicle is encrypted, ensuring that only you can use it. In addition, most models will turn off the engine if it has not been started in the last few minutes. This feature is particularly useful when you are in a risky location or need to leave your vehicle for any reason. Many systems also have the option of a backup system to open and starting the car in case the battery of the smart key runs out while you are on a ride. car smart key replacement involves putting the key into an opening, or keeping it close to a specific area in the cockpit which transfers energy to an electric motor. Some manufacturers have a motorized key blade that can be used in an emergency to open the trunk or to start the car. Battery Life Most newer cars have keyless entry as well as push-button starting systems operated by a smart key fob that uses proximity technology to connect with the car. These systems utilize a tiny transmitter, powered by a coin-sized lithium battery. It will eventually need to be replaced just like any other battery. Although smart key fobs are designed to last for several years, they can suddenly lose power. If the fob is dead, it isn't able to unlock or start your car, even when you hold it near the front door, and the key fob's light flashes. It is not uncommon for the smart key's transmitter to drain the battery. It sends a signal to your car every time you press an option, but the majority times, the smart key does nothing. The battery of a smart key is enough to power several years of lock/unlock signals. The fob may also drain the battery if it is placed near other devices that emit electromagnetic field like computers and phones. These devices emit magnetic fields of their own, which can interfere and slow down the fob transmitter. RepairPal reports that the fob might not function if it's placed too close to the gadgets. Maintenance Contrary to the traditional metal car key, a smart key makes use of technology to control the locks on your vehicle as well as perform other functions. It works by transmitting a signal through antennas placed inside and outside your vehicle that detect the fob's signals and communicate with the car's computer. The car interprets the signal, permitting you to start or open it without the physical key. New vehicles are loaded with the latest electronic technology and the fob has become the hub for many of these functions. The most obvious uses include locking and unlocking your vehicle, remote starting and chirping to help you locate your vehicle in a parking space. Some fobs let you save specific settings for different drivers, as well as remotely open windows and sunroofs. The fob is a complicated electronic device that includes an integrated board that could be damaged if it is placed in a position that is too harsh or exposed to extreme cold or heat. The transmitter can be damaged if dropped or banged. The battery contacts can become bent. These issues can be difficult to identify and solve. It is possible to use your phone to get around this issue to see if it works. However it is recommended to keep a spare key in your pocket in case. You can buy an equivalent replacement for the majority of OEM smart keys that cost up to 70 percent less and is backed by a three-year better-than-OEM guarantee.