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What is a Smart Key Car Key? Sometimes referred to as keys that are in proximity Key fobs, proximity keys, or remote keys, smart keys can be used to unlock doors and start engines without the driver having to insert a physical key. They communicate via radiofrequency signals. Among other things, this helps protect vehicles by preventing attempts to hotwire. Smart keys transmit unique encrypted signals that prevent them from being used by other vehicles. Convenience Rather than having to insert a key into an ignition slot instead, you can lock and unlock your vehicle simply by touching the handle on the door or trunk. A majority of modern cars also include a feature that permits you to start your car via the internet. This is particularly useful when you're bringing groceries into the vehicle as well as transporting passengers or equipment. This technology is intended to protect against theft of vehicles. Instead of transmitting a single frequency signal, like a regular key fob, a smart key sends out a series of encrypted signals to the car's embedded antennas when you approach it. What does this mean? Stuff Works Electronics explains that this is a way to prevent other cars from receiving and responding the same signal. Additionally, some companies employ a computer chip inside the vehicle to recognize the unique fingerprint of each key, which makes sure that only authorized drivers use it. This is beneficial for when you loan your car to family members and friends. Some smart keys can also store user settings, so that the steering wheel, seat, mirror, and stereo presets are automatically set when the key is in range of the car. Certain smart keys can be programmed to stop the vehicle from exceeding a certain speed limit when it is started using that key. This is a great method to keep new drivers safe and also an excellent idea to have children in the back. Security Traditionally keys for cars have been made from metal and used to unlock the ignition. With the advent of smart keys, it is no longer a requirement. Smart keys are equipped with a special chip that sends a signal to your car's antenna. The 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 in your vehicle. The signal that the smart key transmits to your car is encrypted, meaning that only the owner is able to use it. smart forfour key replacement g28carkeys.co.uk of models also shut off the engine when the car hasn't been started for a few minutes. This is especially helpful if you are in a dangerous location or need to leave your vehicle for any reason. A lot of systems also have a backup system for opening and starting the car if the battery of the smart key goes out while on a ride. The backup system typically consists of placing the key into the slot or placing it near a specific part of the cockpit to transfer energy to an electric motor. Some manufacturers also have an key blade that is an emergency mechanical lock in the key which can be used to open the trunk and start the car if needed. Battery Life Most newer cars have keyless entry and push-button starting systems which are controlled by a key fob, which uses proximity technology to connect with the car. These systems rely on a small transmitter that is powered by a lithium coin-sized battery. It will eventually require to be replaced like any other battery. Even though smart key fobs are made to last for several years but they may suddenly lose power. If the fob is dead you won't have the ability to unlock or start your car even when you place it near the front door. It's not uncommon for the transmitter of a smart key to drain the battery. The smart key will send signals each time you press the button. But most of the time, it does nothing. One single lock/unlock button takes only a fraction of the battery power in the fob which means that there's several years ' worth of signals' worth of battery life in an average smart key battery. The fob can also drain the battery if placed near other devices that emit electromagnetic fields such as phones and computers. These devices generate their own magnetic field, which can affect the fob's transmitter, causing it to operate more slowly. RepairPal states that the fob might not function if it's placed too close to the gadgets. Maintenance Smart keys are different from traditional metal keys in that they utilize technology to control the security of your vehicle as well as perform other functions. It works by sending a signal to antennas situated inside and outside of your vehicle. These antennas are able to 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 it without the physical key. New cars are loaded with high-tech electronic features and the fob has become a hub for many of these functions. The most obvious features are locking and unlocking your car, remote start and chirping sound to help you locate your vehicle in a parking area. Some fobs allow you to save various settings for different drivers, and can even remotely open windows as well as the sunroof. The transmitter is a complicated device that has an integrated circuit board, and it is prone to being damaged through repeated use or exposure to cold or heat. The transmitter can break when it's knocked or dropped, and the contacts on the battery can become bent. The issues are often difficult to identify and fix. Try using your smartphone to get around the problem and see if that works, but it's best to keep a backup key in your pocket just in case. You can buy a generic smart key replacement for up to 70% less than OEM keys and comes with a three-year warranty.