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What is a Smart Key Car Key? Smart keys are also known as proximity keys or key fobs. They function to unlock doors as well as start engines without a driver having to insert physical key. They communicate with one another by using radiofrequency signals. Apart from that, it helps to protect cars by preventing attempts at hotwiring. Smart keys emit unique encrypted signals that stop access to other vehicles. Convenience Instead of having to insert the key into an ignition slot instead, you can lock and unlock your vehicle by simply touching the handle of the door or trunk. Modern vehicles often have a feature that allows you to remotely start your engine. This is particularly helpful when you're bringing groceries in or transferring equipment and passengers. This technology is designed to help to prevent theft of vehicles. Instead of transmitting a single frequency signal similar to a normal key fob does, a smart key sends out a series of encrypted signals to the car's antennas embedded in it when you walk towards it. This blocks other cars from being able to receive and respond to the same signal. This explaining how Stuff Works Electronics. Some manufacturers also use an electronic chip in the vehicle which recognizes the unique fingerprint of each key. This makes sure that only authorized users use it. This can be helpful in the event that you lend your car to family and friends. Certain smart keys can also store user settings, ensuring that seat, steering wheel mirror, seat and stereo presets are automatically set when the key is in reach of the car. To make life easier, certain smart keys can be set to stop the car from exceeding a certain speed limit once it has been started with that particular key. This is a great method to keep new drivers safe, and it's also beneficial if you have children in the back. Security Traditionally keys for cars have been cut out of metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys have an exclusive chip that sends an alert to the car's antenna. The signal is subsequently detected by the vehicle when the driver presses on the door handle or trunk release. It is now impossible to lock the keys in your vehicle. The smart key's signal to your vehicle is secured so that only you can use it. Most models also disable the engine if the car hasn't been started in a few minutes. This feature is particularly helpful when you are in a hazardous area or have to leave your vehicle for any reason. There are many systems that also have a backup system for opening and re-starting the car if the battery of the smart key is drained out during a ride. The backup system typically consists of placing the key into the slot or putting it in a particular area of the cockpit that transfers energy to an electric motor. Some manufacturers have a mechanical key blade that can be used in an emergency to open the trunk or start the vehicle. Battery Life Most newer cars come with 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 are powered by a tiny transmitter that is powered by a coin-sized lithium battery. It will eventually need to be replaced as with any other battery. Even though smart key fobs are made to last for years but they may suddenly lose power. If the fob is dead you won't be able to unlock or start your car even holding it close to the front door. It is not uncommon for the transmitter of a smart key drain the battery. The smart key emits the signal each time you press the button. However, most of the time it does nothing. The battery of a smart key is large enough to last for a long time. unlock and lock signals. The fob can also drain the battery if you keep it close to other devices emitting electromagnetic fields, like phones and computers. These devices create their own magnetic fields, which could affect the fob's transmitter, causing it to run slower. RepairPal reports that the fob can not function if it's placed too close to the gadgets. Maintenance In contrast to the traditional car key, a smart one uses technology to control the locks on your vehicle, and also perform other functions. It functions by transmitting an indication from the fob to antennas in and outside the vehicle. These antennas receive the signal and communicate with the computer in your car. The car interprets the signal and allows you to open and start it without using the physical key. The fob is now a hub of numerous electronic features on new automobiles. The most obvious ones are locking and unlocking, remote starting and chirping sound to aid in finding your car in a parking lot. Some fobs allow you to store specific settings for different drivers and remotely open windows and sunroofs. The fob is an elaborate electronic device that has an integrated circuit board that can be damaged if it is utilized too vigorously or exposed to extreme cold or heat. The transmitter can be damaged if it is damaged by being dropped or smashed. smart car key case can become bent. These issues can be challenging to identify and fix. You could try using your phone to avoid the problem and see if this works however, it's best to keep a backup key in your pocket to use in case. You can buy an alternative to the majority of OEM smart keys, which costs up to 70 percent less and comes with a three-year, more than OEM guarantee.