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What is a Smart Key Car Key? Variously known as keys that are in proximity also known as key fobs, keys or remote keys, smart keys work to unlock doors and start engines without the driver needing to insert an actual key. They communicate via radiofrequency signals. In addition, it helps to protect cars by preventing hotwiring attempts. Smart keys broadcast unique encrypted signals that prevent them from being used by other vehicles. Convenience Instead of inserting keys into an ignition slot, you can lock and unlock your vehicle by merely touching the handle of the door or trunk. Modern cars often include a feature that permits you to start your car from a distance. This is especially useful when you're bringing groceries in or transporting passengers and equipment. This technology is designed to stop theft of vehicles. Instead of sending a single frequency signal, as a standard key fob does smart keys send out several encrypted signals to the car's antennas embedded in it when you come close to it. This blocks other cars from receiving and responding to the same signal. This explaining how Stuff Works Electronics. Certain manufacturers also incorporate a computer chip inside the vehicle which recognizes the unique fingerprint of every key. This can help ensure that only authorized users are using it. This can be beneficial when you loan your car to family members and friends. Some smart keys can store user settings, ensuring that the seat, steering wheel, mirror, and stereo presets are automatically set when the key is in the range of the car. Some smart keys can also be programmed to stop the vehicle from crossing a certain speed limit when started with that key. This is a great method to ensure that new drivers are safe and also a good idea to have children in the back. Security Traditionally keys for cars were made from metal and used to unlock the ignition. Smart keys eliminate this requirement. Smart keys are equipped with a chip that sends an antenna signal to your car. This signal is then recognized by the vehicle when the driver presses on the door handle or trunk release. It is now impossible to lock the keys inside your vehicle. The signal that the smart key sends to your car is encrypted, meaning that only the owner can use it. Additionally, the majority of models will disable the engine if it has not been started within the last few minutes. This feature is particularly helpful when you are in an unsafe location or you need to leave your vehicle for any reason. Furthermore, if the smart key battery runs out during a ride, a lot of systems come with a backup plan to open and start the vehicle. The backup system involves placing the key into a slot or holding it near a particular space in the cockpit where energy is transferred to an electric motor. Some manufacturers also have an emergency mechanical key blade in the key which 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 and push-button starters. These are controlled by a smart device that communicates with the car via proximity technology. These systems use a small transmitter, powered by a coin-sized lithium battery. It will eventually have to be replaced like any other battery. Even though smart key fobs are designed to last for several years, they can suddenly lose power. A dead key fob means that you can't unlock or start the car even when you hold it near the front door. The key fob's light blinks. It is not unusual for the sensor of a smartkey to drain the battery. g28carkeys.co.uk sends a signal back to the car every time you press a button, but most of the time, the smart key is not doing anything. A single lock/unlock signal uses only a tiny amount of the fob's battery power which means that there's several years ' worth of signals' worth of battery life in the average smart key battery. The fob also tends to drain the battery if you keep it close to other devices that emit electromagnetic fields, such as phones and computers. These gadgets emit magnetic fields of their own, which can interfere and slow down the fob transmitter. In some cases, the fob may even stop working altogether if the fob is left too close to these devices, according to RepairPal. Maintenance As opposed to the traditional car key, a smart one uses technology to control the locks on your vehicle as well as perform other functions. It operates by transmitting a signal to antennas that are placed both inside and outside your vehicle. They detect the fob's presence and communicate with the car's computer. The car interprets the signal which allows you to turn it on or open the door without a physical key. The fob is now the hub of many electronic features that are now available in new vehicles. The most obvious features are locking and unlocking your vehicle, remote starting and chirping noises to help you locate your car in a parking spot. Certain fobs let you save various settings for different drivers, and can even remotely open windows as well as the sunroof. The fob is a complex electronic device that has an integrated circuit board that can be damaged if subjected to extreme heat or cold. The transmitter can be damaged if dropped or banged. The battery contacts may be bent. The issues are often difficult to diagnose and repair. You could try using your phone to avoid the issue and see if it works however, it's a good idea keep a spare key in your pocket just in case. You can buy an equivalent replacement for the majority of OEM smart keys, which costs up 70% less and comes with a 3-year, better-than-OEM guarantee.