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What is a Smart Key Car Key? Variously known as proximity keys also known as key fobs, keys or remote keys, smart keys are used to unlock doors and start engines without the driver having to insert an actual key. They communicate with one another through radiofrequency signals. Apart from that, it assists in keeping cars safe by stopping attempts at hotwiring. Smart keys transmit unique encrypted signals that keep them from being used by other vehicles. Convenience You can lock and unlock your vehicle without having to insert the key into the ignition slot. Simply touch the handle on the door or trunk. Modern cars often come with a feature that allows you to start your car remotely. This is particularly useful when you are bringing groceries in as well as transporting passengers or equipment. This technology is designed to help to prevent theft of vehicles. Instead of transmitting a single frequency signal, as a standard key fob, a smart key sends out an array of encrypted signals to a car's embedded antennas as you approach it. This prevents other cars from being able to receive and respond to the same signal, explains How Stuff Works Electronics. Certain manufacturers also have a computer chip inside the vehicle that can recognize the unique fingerprint of each key. This ensures that only authorized users are using it. This can be helpful should you lend your vehicle to family members or friends. Some smart keys can also store user preferences so that the mirrors, seat and steering wheel adjustments as well as stereo presets can be automatically set when the key is within the range of the vehicle. For added convenience, some smart keys can be configured to prevent the vehicle from exceeding a speed limit when it is started using that specific key. This can help keep inexperienced drivers safe, and is particularly useful if you have young children in the back. Security Traditionally keys for cars have been cut out of metal and used to unlock the ignition. With the advancement of smart keys it is no longer the case. Smart keys come with an electronic chip that transmits a signal to your car's antenna. The car recognizes this signal when the driver presses the button on the trunk release or door handle. This means that it's not possible to lock your keys into your car. The signal that the smart key transmits to your car is encrypted, meaning only the owner has the right to use it. In addition, many models will stop the engine in the event that the vehicle hasn't been started in the last few minutes. This feature is especially helpful when you're in a dangerous area or have to leave the vehicle for any reason, such as at a gas station. A lot of systems also have an alternative system for opening and starting the car if the battery of the smart keys runs out while you are on a ride. The backup method involves putting the key into a slot or holding it near a particular area in the cockpit where the energy is transferred to an electric motor. Certain manufacturers offer a mechanical key blade that can be utilized in a situation of emergency to open the trunk or start the car. Battery Life Most newer cars have keyless entry and push button starting systems, controlled by a smart key fob that utilizes proximity technology to communicate with the car. smart fortwo key programming www.g28carkeys.co.uk are powered by a small transmitter that is powered by a coin-sized lithium battery. It will eventually require to be replaced like any other battery. Even though smart key fobs are designed to last for many years but they may suddenly lose power. If the fob is dead, you won't be able to lock or start your car, even if you keep it near the front door and the key fob light is flashing. It is not uncommon to see the transmitter of a smart key drain the battery. It sends a signal to the car each time you touch one button, however most times the smart key isn't doing anything. A single lock/unlock signal takes up a miniscule amount of the fob's battery which means that there's many years of signals' worth of battery life in an average smart key battery. The fob can also drain the battery when you keep it close to other devices emitting electromagnetic fields, for example phones and computers. These gadgets emit their own magnetic fields, which can interfere and slow down the fob's transmitter. In certain cases the fob might cease to function completely when the fob is placed too close to these devices, as per RepairPal. Maintenance Smart keys differ from traditional keys made of metal because they use technology to control the locks on your vehicle in addition to performing other functions. It functions by transmitting an indication from the fob to antennas within and outside the vehicle. These antennas detect the signal and then communicate with your car's computer. The car responds to the signal and allows the user to open or start it without the 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 vehicle, remote starting and chirping sounds to aid in locating your vehicle in a parking space. Some fobs let you store specific settings for various drivers, and also open windows remotely and sunroofs. The fob is a complex electronic device with an integrated board that can be damaged if placed in a position that is too harsh or exposed to extreme heat or cold. The transmitter could break if it's knocked or dropped. The battery contacts could become bent. These issues can be difficult to diagnose and resolve. You can try using your phone to bypass the issue and see if that helps however it's best to keep a spare key in your pocket to use in case. You can purchase an ordinary smart key replacement that's up to 70 percent less than OEM keys and comes with a 3-year warranty.