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What is a Smart Key Car Key? Variously known as keys for proximity, key fobs or remote keys, smart keys function to unlock doors and start engines without the driver needing to insert the key. They communicate with radiofrequency signals. Apart from smart car key repair g28carkeys.co.uk , it helps to protect cars by stopping attempts at hotwiring. Smart keys transmit unique encrypted signals that block them from being accessed by other vehicles. Convenience Rather than having to insert keys into an ignition slot, you can lock and unlock your vehicle by simply touching the door handle or trunk. Many modern vehicles have a feature that allows you to remotely start your engine. This is particularly useful if you're bringing in groceries or transporting equipment and passengers. This technology is designed to prevent vehicle theft. Instead of sending one frequency signal like a traditional key fob does it sends out various encrypted signals to the car's antennas embedded in it when you come close to it. This blocks other cars from being able to receive and respond to the same signal, which explains how Stuff Works Electronics. In addition, some manufacturers employ a computer chip inside the car to detect the unique fingerprint of each key, which can ensure that only authorized drivers are using it. This is helpful when you loan your car to family members and friends. Certain smart keys can also store user settings, ensuring that seat, steering wheel, mirror and stereo presets can be automatically set when the key is within range of the car. Some smart keys can also be set up to prevent the vehicle from crossing the speed limit once the key is used to start it. This will help keep new drivers safe and beneficial if you have young children in the back. Security Traditionally, car keys have been cut from metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys come with an electronic chip that transmits an alert to the car's antenna. The signal is then acknowledged by the vehicle when the driver presses on the handle on the door or trunk release. It is now impossible to lock the keys inside your vehicle. The signal that the smart key transmits to your car is encrypted, meaning only the owner has the right to use it. A majority of models also shut down the engine if the car isn't started for several minutes. This feature is especially helpful in case you're in a hazardous area or you have to leave the vehicle for any reason, such as at a gas pump. Furthermore, if the smart key battery gets depleted during a trip, many systems have a backup method of opening and starting the vehicle. The backup system usually involves placing the key into a slot or holding it in a particular area of the cockpit that transfers energy to an electric motor. Certain manufacturers also include an emergency mechanical key blade hidden in the key which can be used to open the trunk and start the car in case of need. Battery Life Many newer cars have keyless entry and push button starting systems, controlled by a smart key fob that utilizes proximity technology to connect with the car. These systems use a tiny transmitter, powered by a lithium coin-sized battery. It will eventually require to be replaced as with any other battery. Most smart key fob batteries last several years However, it doesn't mean they won't go out of power and stop working at any time. A dead fob means you won't be able to lock or start the car, even if you keep it near the door to the front and the key fob's light blinks. It's not unusual for the transmitter inside the smart key to drain the battery. It transmits a signal to the car every time you push the button, but most times, the smart key isn't doing anything. A single signal to lock or unlock takes up a miniscule amount of the battery power in the fob, so there is easily several years worth of signals' worth of battery life in an average smart key battery. The fob also tends to drain the battery if you keep it close to other devices emitting electromagnetic fields, for example phones and computers. These gadgets emit magnetic fields of their own which can interfere with and slow down the fob's transmitter. In certain cases the fob could cease to function entirely if the fob is left too close to these devices, according to RepairPal. Maintenance In contrast to the traditional car key, a smart key utilizes technology to control the locks on your vehicle as well as perform other functions. It operates by sending a signal to the antennas located inside and outside your vehicle. These antennas detect the fob's signal and communicate with the car's computer. The car interprets the signal allowing you to start or open it without a physical key. The fob is now a hub of many electronic features that are now available in new automobiles. The most obvious features are locking and unlocking your car, remote start and chirping sounds to assist you in finding your car in a parking lot. Some fobs also let you store specific settings for various drivers, and also open windows remotely and sunroofs. The fob is an intricate electronic device with an integrated board that could be damaged if utilized too vigorously or exposed to extreme heat or cold. The transmitter can be broken in the event of it being hit or dropped or smashed. The contacts on the battery can become bent. These issues can be difficult to determine and resolve. You can try using your phone to bypass the issue and see if it works, but it's a good idea to keep a backup key in your pocket to use in case. You can buy an ordinary smart key replacement for up to 70 percent less than OEM keys and comes with a three-year warranty.