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What is a Smart Key Car Key? Smart keys are also known as proximity keys or key fobs. They can be used to unlock doors and start engines without having to insert physical key. They communicate using radiofrequency signals. In addition, it assists in keeping cars safe by preventing hotwiring attempts. Smart keys also transmit unique encrypted signals that prevent them from being used by vehicles of other drivers. Convenience Rather than having to insert keys into the ignition slot instead, you can lock and unlock your vehicle simply by touching the handle on the door or trunk. Many modern cars also include a feature that permits you to start your car remotely. This is especially useful for those who are bringing groceries into the vehicle or transporting passengers and equipment. This technology is designed to protect against theft of vehicles. Smart keys send out encrypted signals instead of a single frequency as a regular keyfob does. How Stuff Works Electronics explains that it is impossible for other cars to receive and responding to the same signal. Additionally, some manufacturers employ a computer chip inside the vehicle that can recognize the unique fingerprint of each key, which helps ensure that only authorized drivers use it. This is helpful if you loan your car to family members and friends. Some smart keys can store user settings, ensuring that seat, steering wheel, mirror and stereo presets are automatically set when the key is within the range of the car. To make life easier, certain smart keys can be set to stop the car from exceeding a speed limit once it has been initiated with that specific key. This can help keep inexperienced drivers safe and is beneficial if you have young children in the back. Security Traditionally keys for cars were cut out of metal and used to unlock the ignition. With the advent of smart keys, however, this is no longer the case. Smart keys have an electronic chip that transmits the signal to your car's antenna. The signal is then recognized by the vehicle when the driver presses on the handle of the door or trunk release. It is now impossible to lock the keys inside your vehicle. The signal sent by the smart key to your vehicle is encrypted so that only you are able to use it. A majority of models also shut down the engine if the car hasn't been running for several minutes. This feature is particularly useful when you are in a dangerous location or need to leave your vehicle for any reason. Additionally, if a smart key battery runs out during a ride, many systems offer a backup method of opening and starting the vehicle. The backup system involves inserting the key into the slot, or putting it close to an area in the cockpit which transfers energy to an electric motor. Some manufacturers have a motorized key blade that can be utilized in a situation of emergency to open the trunk or start the vehicle. G28 Car Keys of modern cars have keyless entry systems and push-button starters. They are controlled by a smart fob that communicates with the car using proximity technology. These systems are powered by a tiny transmitter that is powered by a coin-sized lithium battery. Like any other battery that will eventually require replacement. Most smart batteries for key fobs last several years, but that doesn't mean they'll never go out of power and stop working abruptly. If the fob battery is dead, it won't be able unlock or start your car holding it close to the front door. It is not uncommon for the smart key's transmitter to drain the battery. The smart key will send the signal each when you press a button. But most of the times, it doesn't do anything. The battery of the smart key is sufficient to provide several years of signalling to lock and unlock. The fob may also drain the battery if it is placed in proximity to other devices that emit electromagnetic fields, such as computers and phones. These devices generate their own magnetic field which can affect the fob's transmitter, causing it to operate more slowly. In some cases the fob might cease to function entirely if the fob is left too close to these devices, as per RepairPal. Maintenance Smart keys are different from traditional keys by using technology to control the security of your vehicle as well as perform other functions. It works by sending a signal to antennas placed inside and outside your vehicle. These antennas detect the fob's signals and communicate with the car's computer. The car is then able to interpret the signal and allows you to open or start it without using a physical key. The fob is now a center of many electronic features in new vehicles. The most obvious are locking and unlocking, remote start, and chirping to aid in finding your car in a parking space. Some fobs even let you store specific settings for different drivers and open windows remotely and sunroofs. The transmitter itself is a sophisticated device that includes an integrated circuit board and it is prone to being damaged through repeated use or exposure to heat or cold. The transmitter may be damaged if it is damaged by being dropped or smashed. The battery contacts may be bent. These problems can be hard to pinpoint and solve. You can use your phone to bypass this problem to test if it works. However it is important to keep an extra key in your pocket or case. You can purchase an ordinary smart key replacement that's up to 70% less than OEM keys and comes with a 3 year warranty.