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What is a Smart Key Car Key? Smart keys are also referred to as proximity keys or key fobs. They work to unlock doors and to start engines without a driver having to insert a physical keys. They communicate with each other through radiofrequency signals. Apart from that, it helps to protect cars by preventing attempts to hotwire. Smart keys also transmit unique encrypted signals to block them from being used by other vehicles owned by drivers. Convenience You can lock and unlock your vehicle without needing to insert the key into the ignition slot. Simply press the handle on the trunk or door. Modern vehicles often have a feature that allows you to remotely start your engine. This is particularly helpful if you're bringing in groceries or transporting passengers, or equipment. This technology is designed to protect against theft of vehicles. Instead of sending only one frequency signal similar to a normal key fob smart keys send out various encrypted signals to the car's antennas that are embedded when you approach it. How Stuff Works Electronics explains that it is impossible for other cars to receive and responding the same signal. In addition, some manufacturers employ a computer chip inside the car to detect the unique fingerprints of each key, which ensures that only authorized drivers use it. This is helpful in the event that you lend your car to friends and family members. Certain smart keys also save user preferences so that the mirrors, seats and steering wheel adjustments as and stereo presets can be set automatically when the key is within the range of the vehicle. To make things easier, some smart keys can be programmed to stop the car from exceeding a speed limit once it has been started using that specific key. This is a great method to protect new drivers, and it's also beneficial when you have children in the back of the vehicle. Security Traditionally keys for cars have been made of metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys have an electronic chip that transmits the signal to the car's antenna. This signal is then detected by the vehicle when the driver presses on the handle on the door or trunk release. It is now impossible to lock the keys in your vehicle. The signal that the smart key sends to your car is encrypted, meaning that only the owner is able to use it. smart car key recoding of models will also turn off the engine when the car hasn't been started for just a few minutes. This feature is especially useful when you're in a risky area or you have to leave the vehicle for any reason, such as at a gas pump. There are many systems that also have backup systems for opening and starting the car when the battery of the smart key is drained out while riding. The backup system involves inserting the key in the slot, or putting it close to a certain area of the cockpit where energy is transferred to an electric motor. Certain manufacturers also include an emergency mechanical key blade in the key that could be used to open the trunk and start the car should it be needed. Battery Life The majority of modern cars have keyless entry systems as well as push-button starters. These are controlled by a smart fob that communicates with the car via proximity technology. These systems rely on a small transmitter powered by a lithium coin-sized battery. It will eventually have to be replaced, just like any other battery. Although smart key fobs are made to last for years, they can suddenly lose power. A dead key fob means you won't be able to lock or start your car, even when you hold it near the front door. The key fob light is flashing. It's not uncommon for the transmitter of a smart key to drain the battery. It sends a signal back to the car each time you press a button, but most of the time the smart key isn't doing anything. A single signal to lock or unlock takes only a fraction of the fob's battery power and that's several years ' worth of signals' worth of battery life in an average smart key battery. The fob also drains the battery when it is placed in proximity to other devices that emit electromagnetic field like phones and computers. These devices create their own magnetic field which could interfere with the fob's own transmitter and cause it to operate more slowly. In certain cases, the fob may even stop working altogether when it is placed too close to these devices, according to RepairPal. Maintenance Smart keys differ from traditional keys made of metal by using technology to control the security of your vehicle in addition to performing other functions. It works by transmitting an indication from the fob to antennas in and outside the vehicle. These antennas sense the signal and communicate with the computer in your car. The car then interprets the signal and allows you to open or begin it without having to use the physical key. New vehicles are loaded with the latest electronic technology and the fob has become an interface for many of these functions. The most obvious ones are locking and unlocking, remote start, and chirping sounds that help you find your car in a parking spot. Certain fobs let you save different settings for different drivers, as well as remotely open windows and the sunroof. The fob is an elaborate electronic device that includes an integrated board that can be damaged if it is used too hard or exposed to extreme cold or heat. The transmitter can be damaged if it is damaged by being dropped or smashed. The battery contacts may be bent. These problems can be hard to diagnose and repair. You can try using your smartphone to get around the problem and see if that helps however, it's a good idea to keep a backup key in your pocket, just in case. You can purchase an ordinary smart key replacement that is up to 70% less than OEM keys and comes with a 3 year warranty.