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What is a Smart Key Car Key? Also known as proximity keys, key fobs or remote keys, smart keys are used to unlock doors and start engines without the driver needing to insert the key. They communicate with each other via radiofrequency signals. Apart from that, it assists in keeping cars safe by stopping hotwiring attempts. Smart keys transmit unique encrypted signals that block access to other vehicles. Convenience Instead of inserting keys into an ignition slot instead, you can lock and unlock your vehicle by simply touching the door handle or trunk. Many modern vehicles have an option that allows you to start your engine from a distance. This is particularly useful when you are bringing groceries in or transporting passengers, or equipment. This technology is designed to prevent vehicle theft. Instead of sending one frequency signal like a traditional key fob does smart keys send out a series of encrypted signals to a car's embedded antennas as you come close to it. How Stuff Works Electronics explains that this is a way to prevent other cars from receiving and responding the same signal. Certain manufacturers also incorporate a computer-chip in the vehicle that recognizes the unique fingerprints of each key. This ensures that only authorized users use it. This is helpful if you loan your vehicle to family members or friends. Certain smart keys also store user preferences so that the seat, mirrors and steering wheel adjustments as well as stereo presets can be set automatically when the key is within reach of the vehicle. For additional convenience, certain smart keys can be set to stop the vehicle from exceeding a certain speed limit when initiated with that specific key. smart car replacement key can help keep inexperienced drivers safe, and is particularly beneficial if you have young children in the back of the vehicle. Security Traditionally keys for cars were cut from metal and used to unlock the ignition. Smart keys eliminate this need. Smart keys have a special chip which sends an antenna signal to your car. The signal is then detected by the vehicle when the driver presses on the handle of the door or trunk release. This means that it's impossible to lock your keys inside your car. The signal that the smart key transmits to your car is encrypted, which means only the owner has the right to use it. Additionally, the majority of models will shut off the engine if the vehicle hasn't been started within the last few minutes. This feature is especially useful when you're in a dangerous zone or need to leave the vehicle for reasons of any kind, like at a petrol station. A lot of systems also have backup systems for opening and starting the car when the battery of the smart key goes out while riding. The backup method typically involves 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 which can be used to open the trunk and start the car if needed. Battery Life The majority of newer cars come with keyless entry and push-button starting systems operated by a smart key fob that utilizes proximity technology to communicate with the car. These systems utilize a tiny transmitter, powered by a coin-sized lithium battery. It will eventually have to be replaced like any other battery. The majority of smart key fob batteries last for a long time however this doesn't mean that they won't fail to power up and stop functioning suddenly. A dead key fob means that it isn't able to unlock or start the car even when you hold it near the front door. The key fob light flashes. It is not uncommon for the smart key's transmitter to drain the battery. The smart key emits signals each time you press a button. But most of the time, it doesn't do anything. The battery of the smart key is sufficient to last for several years of signalling to lock and unlock. The fob may also drain the battery if placed in proximity to other devices that emit electromagnetic field like phones and computers. These devices produce their own magnetic field which can affect the fob's transmitter, causing it to function slower. RepairPal states that the fob might not function if it's placed too close to the gadgets. Maintenance Smart keys differ from traditional metal keys in that they utilize technology to control the locks of your car, as well as perform other functions. It functions by sending a signal from the fob to antennas inside and outside the vehicle. The antennas pick up the signal and then communicate with your car's computer. The car interprets the signal permitting you to start or open the door without a physical key. New cars are loaded with advanced electronic features and the fob is now an interface for many of these functions. The most obvious functions are locking and unlocking your car, remote start and chirping sound to assist you in finding your car in a parking lot. Some fobs allow you to store various settings for various drivers, and remotely open windows and even the sunroof. The fob is a complicated device that has an integrated circuit board and it can be damaged when exposed to cold or heat. The transmitter can break in the event of it being dropped or banged, and the battery contacts can also become bent. These problems can be hard to determine and fix. You could try using your phone to bypass the issue and see if that works however it's always a good idea to keep a spare key in your pocket just in case. You can buy an ordinary smart key replacement that costs up to 70 percent less than OEM keys and comes with a 3-year warranty.