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What is a Smart Key Car Key? Differently referred to as keys for proximity as well as key fobs, remote keys, smart keys function to unlock doors and start engines without the driver having to insert a physical key. They communicate by radiofrequency signals. This helps keep vehicles secure by not allowing hotwiring. Smart keys also broadcast unique encrypted signals that prevent them from being used by other vehicles driven by drivers. Convenience You can lock and unlock your vehicle without having to insert the key into the ignition slot. Simply tap the handle on the trunk or door. A lot of modern cars have a feature which allows you to start your car remotely. This is especially helpful when you're bringing groceries in or transporting equipment, passengers, or passengers. This technology is designed to protect against theft of vehicles. Smart keys transmit encrypted signals instead of a single frequency, similar to a traditional keyfob. This stops other vehicles from receiving and responding to the same signal. This explain how Stuff Works Electronics. Some manufacturers also use a computer chip inside the vehicle that detects the unique fingerprint of every key. This can help ensure that only authorized users are using it. This can be beneficial if you lend your car to family members and friends. Some smart keys also store user preferences, so that the steering wheel, seat, mirror and stereo presets can be automatically set when the key is within range of the car. For added convenience, some smart keys can be configured to stop the car from exceeding a certain speed limit once it has been started with that particular key. This can help keep inexperienced drivers safe and beneficial if you have young children in the back of the vehicle. Security Traditionally keys were made of metal to open the ignition. With smart key technology, however, this is no longer necessary. Smart keys come with an electronic chip that transmits an alert to your car's antenna. The car detects this signal when the driver presses on the trunk release or door handle. This means that it's not possible to lock your keys inside your car any longer. The signal that the smart key sends to your car is encrypted, meaning that only the owner is able to use it. The majority of models also shut off the engine if it hasn't been started in some time. This feature is particularly useful when you are in a hazardous area or have to leave your vehicle for any reason. Many systems also have a backup system for opening and re-starting the car if the battery of the smart key goes out while you are on a ride. The backup method typically involves placing the key in an opening or keeping it in a particular area of the cockpit, which transfers energy to an electric motor. Certain manufacturers also include an emergency mechanical key blade inside the key that can be used to open the trunk and start the car if needed. Battery Life The majority of modern cars have keyless entry systems and push-button starters. They are controlled by a smart device that communicates with your car using proximity technology. These systems utilize a tiny transmitter, powered by a lithium coin-sized battery. Like any other battery it will eventually need replacement. Even though smart key fob s are designed to last for many years however, they can suddenly lose power. If the fob is dead you won't be able to unlock or start your car even holding it near the front door. It's not unusual for the transmitter of a smart key to drain the battery. The smart key transmits signals each time you press a button. But most of the time it does nothing. A single lock/unlock signal uses only a fraction of the battery power of the fob and that's many years of signals' worth of battery life left in the average smart key battery. The fob can also drain the battery if placed in proximity to other devices that emit electromagnetic fields like computers and phones. These gadgets produce their own magnetic field, which could interfere with the fob's transmitter, causing it to function slower. RepairPal states that the fob might stop working if it is placed too close to the gadgets. Maintenance Smart keys are different from traditional keys by using technology to control the locks of your car and perform other functions. It functions by transmitting an indication from the fob to antennas in and outside the vehicle. The antennas pick up the signal and communicate with your car's computer. The car interprets the signal and allows you to begin or close it without having to use the physical key. New cars are packed with the latest electronic technology, and the fob has become an instrument for many of these functions. The most obvious functions are locking and unlocking your vehicle, remote starting and chirping to help you locate your vehicle in a parking space. Certain fobs let you store various settings for different drivers, and can even remotely open windows as well as the sunroof. The transmitter itself is a sophisticated device that has an integrated circuit board, and it is susceptible to damage by repeated use or exposure to cold or heat. The transmitter could be damaged in the event of it being damaged by a fall or a bang and the battery contacts may also be bent. These problems can be hard to pinpoint and fix. You can try using your phone to solve the issue and see if that helps, but it's always a good idea to keep a backup key in your pocket just in case. You can buy an alternative to the majority of OEM smart keys for up to 70% less and comes with a three-year, higher-quality guarantee than OEM.