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What is a Smart Key Car Key? Smart keys are also known as proximity keys or key fobs. They function to unlock doors as well as start engines without needing to insert physical key. They communicate using radiofrequency signals. This helps to keep vehicles secure by not allowing hotwiring. Smart keys transmit unique encrypted signals that prevent 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 tap the door handle or trunk. A majority of modern cars also come with a feature that lets you to start your car remotely. This is particularly useful when you are bringing groceries in, or transporting passengers or equipment. This technology is designed to help prevent vehicle theft. Smart keys transmit encrypted signals instead of a single frequency, like a normal keyfob. This stops other vehicles from receiving and responding to the same signal. which explains how Stuff Works Electronics. Additionally, some companies employ a computer chip inside the vehicle to recognize the unique fingerprint of each key, which can ensure that only authorized drivers are using it. This is particularly useful if you loan your vehicle to family members or friends. Certain smart keys also store user settings so that mirrors, seats and steering wheel adjustments as and stereo presets can be set automatically when the key is within reach of the vehicle. Certain smart keys can be set up to prevent the vehicle from exceeding the speed limit when the key is used to start it. This is a great way to protect new drivers and it's recommended when you have children in the back of the vehicle. Security Traditionally keys were cut from metal to open the ignition. With smart key for cars G28 Car Keys of smart key technology however, this is no longer required. Smart keys are equipped with an exclusive chip that sends an alert to the car's antenna. The signal is then detected by the vehicle when the driver presses a button 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 sends to your car is encrypted, which means that only the owner can use it. The majority of models will also turn off the engine when the car hasn't been running for some time. This feature is particularly helpful when you are in a hazardous location or you need to leave your vehicle for any reason. A lot of systems also have a backup system for opening and starting the car when the battery of the smart key is drained out while you are on a ride. The backup system involves placing the key in a slot or holding it close to a specific area of the cockpit where the energy is transferred to an electric motor. Certain manufacturers also include 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 come with keyless entry as well as push-button starting systems, controlled by a smart key fob that uses proximity technology to communicate with the car. These systems are powered by a tiny transmitter which is powered by a coin-sized lithium battery. As with all batteries that will eventually require replacement. Even though smart key fobs are made to last for years, they can suddenly lose power. If the fob is dead it won't be able unlock or start your car holding it close to the front door. It's not uncommon for the transmitter in the smart key to drain the battery. The smart key will send an alert each when you press the button. But the majority of times, it doesn't do anything. A single signal to lock or unlock takes just a tiny portion of the battery power in the fob and that's several years worth of signals' worth of battery life in the average smart key battery. The fob is also prone to drain the battery if you keep it close to other devices that emit electromagnetic fields, like phones and computers. These devices 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 Contrary to the traditional metal car key, a smart one uses technology to control the locks on your vehicle and perform some other functions. It functions by transmitting an electronic signal from the fob to antennas within and outside the vehicle. These antennas receive the signal and communicate with your car's computer. The car responds to the signal and allows you to open or begin it without using a physical key. New vehicles are loaded with advanced electronic features and the fob has become the hub for many of these functions. The most obvious are locking and unlocking, remote starter, and chirping sounds to aid in finding your car in a parking space. Some fobs allow you to save various settings for different drivers, as well as remotely open windows as well as the sunroof. The fob itself is a specialized device that has an integrated circuit board and it is prone to being damaged by repeated use or exposure to heat or cold. The transmitter can break if it is knocked or dropped, and the contacts on the battery can become bent. These problems can be difficult to determine and repair. It is possible to use your phone to solve this issue and see if it works. However it is recommended to keep an extra key in your pocket or case. You can purchase an equivalent replacement for the majority of OEM smart keys, which costs up to 70% less and is backed by a three-year higher-quality guarantee than OEM.