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What is a Smart Key Car Key? Smart keys are also referred to as proximity keys or key fobs. They can be used to unlock doors as well as start engines without a driver having to insert a physical key. They communicate with one another via radiofrequency signals. This helps to keep cars secure by stopping hotwiring. Smart keys broadcast unique encrypted signals that block them from being used by other vehicles. Convenience Instead of putting a key into an ignition slot it is possible to lock and unlock your vehicle by merely touching the handle on the door or trunk. Many modern vehicles have an option that allows you to start your engine remotely. This is especially helpful for those who are bringing groceries into the vehicle or transporting equipment, passengers, or passengers. This technology is intended to stop theft of vehicles. Instead of sending only one frequency signal similar to a normal key fob, a smart key sends out a series of encrypted signals to a car's antennas that are embedded when you are near it. This prevents other cars from being able to receive and respond to the same signal. This explaining how Stuff Works Electronics. Certain manufacturers also have an electronic chip in the vehicle that recognizes the unique fingerprint of every key. This makes sure that only authorized users are using it. This is beneficial if you loan your car to family members and friends. Some smart keys also store user preferences so that the mirrors, seats, and steering wheel adjustments, as also stereo presets may be set automatically when the key is within reach of the vehicle. Certain smart keys can be set up to prevent the vehicle from going over the speed limit when you start the car with that key. This will help keep new drivers safe and is useful if you have young children in the back of the vehicle. Security Traditionally, car keys have been cut from metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys come with a chip which sends signals from the antenna to your car. The vehicle recognizes this signal when the driver presses the button on the trunk release or door handle. It is now impossible to lock your keys into your vehicle. The smart key's signal to your vehicle is encrypted to ensure that only you can access it. In addition, most models will turn off the engine if it is not started in the last couple of minutes. This feature is particularly helpful if you are in a hazardous area or you have to get out of your vehicle for any reason. Additionally, if a smart key battery is depleted during a trip, many models have a backup system to open and start the vehicle. The backup system typically involves placing the key into the slot or putting it near a specific part of the cockpit to transfer energy to an electric motor. Some manufacturers also have an emergency mechanical key blade hidden inside the key that can be used to open the trunk and start the car should it be needed. Battery Life The majority of newer cars have keyless entry systems as well as push-button starters. They are controlled by a smart fob which communicates with the car using proximity technology. These systems use a small transmitter, powered by a lithium coin-sized battery. It will eventually require to be replaced as with any other battery. Even though smart key fobs are made to last for several years but they may suddenly lose power. If smart car keys is dead you won't be able unlock or start your car even holding it close to the front door. It is not unusual for the transmitter of a smart key drain the battery. The smart key sends the signal each time you press the button. However, most of the times, it doesn't do anything. A single lock/unlock signal takes only a tiny amount of the battery power in the fob and, therefore, there's many years of signals worth of battery life left in the average smart key battery. The fob may also drain the battery when it is placed near other devices that emit electromagnetic field, such as phones and computers. These gadgets produce their own magnetic field which can interfere with the fob's own transmitter, causing it to function slower. In certain cases the fob could cease to function completely when it is placed too close to these devices, according to RepairPal. Maintenance As opposed to the traditional car key, a smart key makes use of technology to control the locks on your vehicle, and also perform other functions. It works by transmitting a signal to antennas situated inside and outside of your vehicle. These antennas are able to detect the fob's presence and communicate with the car's computer. The car interprets the signal and allows you to open or begin it without using a physical key. The fob is now the hub of numerous electronic features on new automobiles. The most obvious ones are locking and unlocking, remote starting and chirping to assist you in finding your car in a parking space. Certain fobs let you save various settings for various drivers, and remotely open windows as well as the sunroof. The fob is an intricate electronic device that includes an integrated board. It can be damaged if placed in a position that is too harsh or exposed to extreme cold or heat. The transmitter can break when it is damaged by a fall or a bang and the contacts on the battery can become bent. These issues can be challenging to pinpoint and resolve. You can use your phone to get around this issue to test if it works. However it is important to keep an extra key in your wallet in a case. You can purchase a generic smart key replacement that is up to 70% less than OEM keys and comes with a 3 year warranty.