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What is a Smart Key Car Key? Differently referred to as keys that are in proximity as well as key fobs, remote keys, smart keys can be used to unlock doors and start engines without the driver needing to insert the key. They communicate via radiofrequency signals. Among other things, this assists in keeping cars safe by stopping hotwiring attempts. Smart keys also broadcast unique encrypted signals to prevent them from being used by vehicles of other drivers. Convenience Rather than having to insert keys into an ignition slot instead, you can lock and unlock your car by simply pressing the handle of the door or trunk. A lot of modern cars come with a feature that allows you to start your car from a distance. This is particularly useful if you are bringing groceries in as well as transporting passengers or equipment. This technology is designed to protect against theft of vehicles. Instead of transmitting one frequency signal like a regular key fob does it sends out an array of encrypted signals to the car's antennas that are embedded when you approach it. How Stuff Works Electronics explains that this stops other vehicles from receiving and responding the same signal. Additionally, some manufacturers use a computer chip in the vehicle that can recognize the unique fingerprint of each key, which ensures that only authorized drivers use it. This is particularly useful in the event that you lend your car to family and friends. Some smart keys can store user settings, ensuring that the seat, steering wheel mirror, seat and stereo presets can be automatically set when the key is in the range of the vehicle. To make things easier, some smart keys can be programmed to stop the car from exceeding a specific speed limit when started with that particular key. This will help keep new drivers safe and beneficial if you have young children in the back of the vehicle. Security Traditionally keys for cars were cut from metal and used to unlock the ignition. With the advent of smart key technology however, this is no longer necessary. Smart keys have an electronic chip that transmits a signal to the car's antenna. The car recognizes this signal when the driver presses on the trunk release or door handle. This means it's not possible to lock your keys into your car any longer. The smart key's signal to your vehicle is secured so that only you have access to it. In addition, many models will stop the engine if it is not started within the last few minutes. This feature is particularly useful when you are in a hazardous area or you have to get out of your vehicle for any reason. Many systems also have backup systems for opening and starting the car in case the battery of the smart key is drained out during a ride. The backup system involves placing the key into the slot, or putting it close to a certain location in the cockpit, which transfers energy to an electric motor. smart car key repair have a mechanical key blade that can be used in an emergency to open the trunk or start the car. Battery Life Many newer cars have keyless entry systems as well as push-button starters. They are controlled by a smart fob that communicates with your car using proximity technology. These systems rely on a small transmitter powered by a coin-sized lithium battery. Like all batteries, it eventually needs replacement. Although smart key fobs are made to last for years but they may suddenly lose power. A dead key fob means you won't be able to lock or start the car, even if you keep it near the front door and the key fob's light blinks. It's not unusual for the transmitter in the smart key to drain the battery. It sends a signal back to the car every time you push the button, but most of the time the smart key isn't doing anything. A single lock/unlock signal uses only a fraction of the battery power of the fob, so there is easily several years ' worth of signals' worth of battery life for the average smart key battery. The fob also drains the battery if it is kept near other devices that emit electromagnetic field like phones and computers. These devices emit magnetic fields of their own that can interfere with and slow down the fob transmitter. In some instances, the fob may even stop working altogether when it is placed too close to these devices, as per RepairPal. Maintenance Smart keys are different from traditional metal keys because they use technology to control the locks of your vehicle and 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 your car's computer. The car interprets the signal which allows you to turn it on or close it without having to use the physical key. New cars are loaded with advanced electronic features and the fob has become an instrument for many of these functions. The most obvious are locking and unlocking, remote starting and chirping to help you find your car in a parking lot. Some fobs allow you to store specific settings for various drivers, and also open windows remotely and sunroofs. The fob itself is a complex device that includes an integrated circuit board, and it is prone to being damaged by hard use or exposure to cold or heat. The transmitter can break in the event of it being dropped or banged, and the battery contacts may also be bent. The issues are often difficult to determine and solve. You could try using your phone to solve the issue and see if that works however, it's always a good idea to keep a spare key inside your pocket in a case. You can buy an ordinary smart key replacement that's up to 70% less than OEM keys and comes with a 3-year warranty.