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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 can be used to unlock doors and start engines without needing to insert a physical key. They communicate by radiofrequency signals. This helps keep vehicles safe by blocking hotwiring. Smart keys also broadcast unique encrypted signals to prevent them from being used by other drivers' vehicles. Convenience Rather than having to insert the key into an ignition slot, you can lock and unlock your vehicle by merely touching the handle on the door or trunk. Many modern vehicles also offer an option that allows you to remotely start your engine. This is particularly useful when you are bringing groceries in, or transporting passengers or equipment. This technology is designed to help protect against theft of vehicles. Smart keys send out encrypted signals instead of a single frequency, as a regular keyfob does. This blocks other cars from being able to receive and respond to the same signal, explains How Stuff Works Electronics. Some manufacturers also use computers in their vehicles that can recognize the unique fingerprint of each key. This ensures that only authorized users use it. This is helpful for when you loan your car to family members and friends. Some smart keys also store user preferences, allowing mirrors, seats, and steering wheel adjustments as along with stereo presets can be set automatically when the key is within range of the vehicle. For added convenience, some smart keys can be set to stop the vehicle from exceeding a speed limit when it is activated with a specific key. This is a great way to ensure that new drivers are safe, and it's also an excellent idea for families with children in the back of the vehicle. Security Traditionally, car keys have been cut from metal and used to unlock the ignition. With the advent of smart keys however, this is no longer necessary. Smart keys come with a chip that sends an antenna signal to your car. This signal is then received by the vehicle whenever the driver presses on the door handle or trunk release. This means it's impossible to lock your keys into your car. The smart key's signal to your vehicle is encrypted, ensuring that only you can access it. A majority of models also shut down the engine if it hasn't been started in a few minutes. smart car key reprogramming G28 Car Keys is particularly useful if you are in a hazardous location or you need to leave your vehicle for any reason. There are many systems that also have backup systems for opening and starting the car in case the battery of the smart key is drained out while on a ride. The backup system typically consists of putting the key in a slot or holding it in a particular area of the cockpit. This transfers energy to an electric motor. Some manufacturers also have an key blade that is an emergency mechanical lock in the key that can be used to open the trunk and start the car in case of need. Battery Life Many newer cars have keyless entry as well as push-button starting systems operated by a smart key fob that uses proximity technology to connect with the car. These systems are powered by a tiny transmitter that is powered by a lithium coin-sized battery. It will eventually require to be replaced, just like any other battery. Most smart batteries for key fobs last several years however, this doesn't mean that they won't go out of power and stop working suddenly. A dead key fob means you won't be able to lock or start the car, even if you place it near the front door. The key fob's light blinks. It's not uncommon for the transmitter in a smart key to drain the battery. The smart key will send a signal every when you press the button. But most of the time, it doesn't do anything. The battery of a smart key can be used to last for several years of unlock and lock signals. The fob is also prone to drain the battery if you place it close to other devices that emit electromagnetic fields, like phones and computers. These gadgets produce their own magnetic field which could affect the fob's transmitter and cause it to work slower. In certain cases the fob could be unable to function in the event that the fob is too close to these devices, according to RepairPal. Maintenance In contrast to the traditional car key, a smart key makes use of technology to control the locks on your vehicle, and also perform other functions. It operates by sending a signal to antennas that are placed both inside and outside your vehicle. These antennas detect the fob's signals and communicate with the car's computer. The car interprets the signal, and allows you to begin or open the door without a physical key. New vehicles are loaded with the latest electronic technology and the fob has become a hub for many of these functions. The most obvious ones are locking and unlocking, remote starting and chirping sounds that assist you in finding your car in a parking spot. Certain fobs let you save various settings for different drivers, and even remote-operated windows and the sunroof. The fob is a complex electronic device that has an integrated circuit board that can be damaged if it is subjected to extreme cold or heat. The transmitter can be damaged if it is dropped or banged. The battery contacts can be bent. These issues can be difficult to identify and solve. You can utilize your smartphone to bypass this problem to test if it works. However it is important to keep a spare key in your pocket in case. You can buy a generic replacement for the majority of OEM smart keys for up to 70% less and comes with a 3-year, higher-quality guarantee than OEM.