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What is a Smart Key Car Key? Also known as keys for proximity, key fobs or remote keys, smart keys work to unlock doors and start engines without the driver needing to insert the key. They communicate by radiofrequency signals. Apart from that, it assists in keeping cars safe by preventing hotwiring attempts. Smart keys emit unique encrypted signals that block them from being accessed by other vehicles. Convenience Instead of inserting keys into an ignition slot it is possible to lock and unlock your vehicle by simply pressing the handle on your door or trunk. Modern cars often have a feature which allows you to start your car wirelessly. This is particularly useful when you're taking groceries home or transporting passengers and equipment. This technology is designed to prevent vehicle theft. Instead of transmitting a single frequency signal like a traditional key fob it sends out an array of encrypted signals to the car's antennas that are embedded when you are near it. This stops other vehicles from receiving and responding to the same signal. This explains How Stuff Works Electronics. Certain manufacturers also incorporate an electronic chip in the vehicle that recognizes the unique fingerprint of every key. This helps to ensure that only authorized users are using it. This is useful if you loan your vehicle to family members or friends. Certain smart keys also store user settings so that seat, mirrors, and steering wheel adjustments, as also stereo presets may be automatically set when the key is within reach of the vehicle. For additional convenience, certain smart keys can be programmed to stop the vehicle from exceeding a certain speed limit when activated with a specific key. This can help keep novice drivers safe and can be useful if you have young children in the back of the vehicle. Security Traditionally keys for cars have been made from metal and used to unlock the ignition. Smart key technology eliminates this requirement. Smart keys come with an electronic chip that transmits the signal to your car's antenna. The car recognizes this signal when the driver presses the button on the trunk release or door handle. It is now impossible to lock the keys in your vehicle. The signal that the smart key sends to your car is encrypted, which means that only the owner is able to use it. The majority of models will also turn off the engine if the car hasn't been started for several minutes. This feature is especially useful when you're in a dangerous zone or need to leave the vehicle for any reason, such as at a petrol station. In addition, if the smart key battery is depleted during a journey, many systems have a backup method of opening and starting the vehicle. 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. Certain manufacturers have a mechanical key blade that can be used in an emergency to open the trunk or start the car. Battery Life Many newer cars have keyless entry and push-button start systems that are controlled by a smart key fob, which uses proximity technology to communicate with the car. These systems utilize a tiny transmitter, powered by a lithium coin-sized battery. It will eventually have to be replaced just like any other battery. Although smart key fobs are designed to last for a long time, they can suddenly lose power. If the fob is dead, you can't unlock or start your car even if you keep it near the front door. The key fob's light blinks. It is not unusual for the smart key's transmitter to drain the battery. The smart key will send signals each when you press a button. But most of the time it does nothing. A single lock/unlock signal uses just a tiny portion of the fob's battery and that's several years worth of signals' worth of battery life in an average smart key battery. The fob can also drain the battery when it is located near other devices which emit electromagnetic fields like computers and phones. These devices generate their own magnetic field, which can affect the fob's transmitter, causing it to run slower. RepairPal reports that the fob can cease to function if placed too close to the gadgets. Maintenance Unlike the traditional metal car key, a smart one uses technology to control the locks on your vehicle and perform other functions. It works by sending signals from the fob to antennas inside and outside the vehicle. These antennas detect the signal and then communicate with the computer in your car. The car responds to the signal and allows you to open and start it without having to use the physical key. The fob is now a central point for many electronic features that are now available in new vehicles. The most obvious uses are locking and unlocking your vehicle, remote starting and chirping sound to help you locate your car in a parking space. Some fobs allow you to store different settings for different drivers, and even remotely open windows and the sunroof. The transmitter itself is a sophisticated device that includes an integrated circuit board and it can be damaged by hard use or exposure to cold or hot. replacement smart car key can be broken when it's dropped or banged and the contacts on the battery can become bent. These issues can be difficult to diagnose and solve. You can try using your smartphone to get around the problem and see if that works however it's a good idea keep a spare key inside your pocket in a case. You can buy an ordinary smart key replacement that costs up to 70% less than OEM keys and comes with a 3-year warranty.