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What is a Smart Key Car Key? Sometimes referred to as keys for proximity as well as key fobs, remote keys, smart keys are used to unlock doors and start engines without the driver having to insert the key. They communicate with radiofrequency signals. Apart from that, it assists in keeping cars safe by preventing attempts at hotwiring. Smart keys also transmit unique encrypted signals to stop them from being used by other vehicles owned by drivers. Convenience Instead of having to insert a key into an ignition slot to lock and unlock your car by simply pressing the handle on the door or trunk. Modern cars often come with a feature that allows you to start your car via the internet. This is particularly useful if you're bringing in groceries or transporting passengers and equipment. This technology is designed to help protect against theft of vehicles. 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. explains How Stuff Works Electronics. Some manufacturers also use computers in their vehicles that recognizes the unique fingerprint of every key. This helps to ensure that only authorized users use it. This is useful if you lend your car to friends and family members. 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 car. Some smart keys may also be set up to prevent the vehicle from exceeding the speed limit once started with that key. This is a great way to ensure that new drivers are safe and also an excellent idea to have children in the back. Security Traditionally keys for cars have been made from metal and used to unlock the ignition. With the advent of smart key technology it is no longer necessary. Smart keys have an electronic chip that transmits signals to your car's antenna. The car recognizes this signal when the driver presses the button on the trunk release or door handle. It is now impossible to lock the keys inside your vehicle. The signal that the smart key transmits to your car is encrypted, which means only the owner has the right to use it. Additionally, the majority of models will disable the engine in the event that the vehicle is not launched in the past few minutes. This is especially helpful if you are in a risky area or have to leave your vehicle for any reason. Additionally, if a smart key battery is depleted during a trip, many models have a backup system of opening and starting the vehicle. The backup system typically consists of placing the key in an opening or keeping it in a particular area of the cockpit to transfer energy to an electric motor. Some manufacturers also have an key blade that is an emergency mechanical lock inside the key that can be used to open the trunk and start the car should it be needed. Battery Life Most newer cars come with keyless entry systems as well as push-button starters. They are controlled by a smart key fob that communicates with the car using proximity technology. These systems rely on a small transmitter that is powered by a coin-sized lithium battery. Like any other battery that will eventually require replacement. Although smart key fobs are made to last for a long time They can be suddenly lost power. If the fob battery is dead, you won't be able to unlock or start your car even when you place it close to the front door. It is not uncommon to see the smart key's transmitter to drain the battery. It transmits a signal to the car every time you push an option, but the majority times, the smart key is doing nothing. A single signal to lock or unlock takes only a tiny amount of the fob's battery power which means that there's several years ' worth of signals' worth of battery life for the average smart key battery. The fob also drains the battery if it is placed in proximity to other devices that emit electromagnetic field, such as phones and computers. These devices create their own magnetic field, which can interfere with the fob's own transmitter, causing it to operate more slowly. RepairPal states that the fob may be inoperable if placed too close to the gadgets. Maintenance Smart keys are different from traditional keys by using technology to control the locks on your vehicle and perform other functions. It works by sending a signal to antennas located inside and outside your vehicle. These antennas are able to detect the fob's signal and connect with the car's computer. The car responds to the signal and allows you to open or begin it without using the physical key. New cars are packed with advanced electronic features and the fob is now the hub for many of these functions. The most obvious are locking and unlocking, remote starter, and chirping sounds to assist you in finding your car in a parking spot. Some fobs allow you to save specific settings for different drivers and remotely open windows and sunroofs. The fob is a complicated electronic device with an integrated board. It can be damaged if used too hard or exposed to extreme cold or heat. The transmitter can be broken when it's hit or dropped or smashed. The battery contacts can also become bent. These issues can be difficult to pinpoint and solve. You can utilize your smartphone to overcome this issue to check if it is working. However it is recommended to keep an extra key in your pocket in case. You can buy an alternative to the majority of OEM smart keys that cost up to 70 percent less and comes with a three-year more than OEM guarantee.