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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 a driver needing to insert physical key. They communicate with one another through radiofrequency signals. This helps to keep cars secure by blocking hotwiring. Smart keys also transmit unique encrypted signals that prevent them from being used by other drivers' vehicles. Convenience Instead of inserting keys into an ignition slot to lock and unlock your vehicle by merely touching the door handle or trunk. Many modern cars also come with a feature that allows you to start your car from a distance. This is particularly useful when you are bringing in groceries or transporting passengers, or equipment. This technology is designed to to prevent theft of vehicles. Smart keys send out encrypted signals instead of a single frequency as a regular keyfob does. How Stuff Works Electronics explains that this stops other vehicles from receiving and responding the same signal. Certain manufacturers also incorporate an electronic chip in the vehicle which recognizes the unique fingerprints of each key. This makes sure that only authorized users use it. This is useful if you lend your car to family members and friends. Some smart keys can also store user preferences, so that the seat, steering wheel, mirror, and stereo presets are automatically set when the key is within the range of the vehicle. To make life easier, certain smart keys can be set to stop the vehicle from exceeding a speed limit when started using that specific key. This is a great way to ensure the safety of new drivers, and it's also an excellent idea for families with children in the back of the vehicle. Security Traditionally keys were made of metal to open the ignition. With the advent of smart key technology, this is no longer required. G28CarKeys are equipped with a specific chip that sends an alert to your car's antenna. The car recognizes this signal when the driver presses on the trunk release or door handle. It is now impossible to lock the keys in your vehicle. The signal that the smart key transmits to your car is encrypted, meaning that only the owner can use it. A majority of models also shut down the engine when the vehicle hasn't been started in several minutes. This is especially helpful if you are in an unsafe location or need to leave your vehicle for any reason. Additionally, if a smart key battery runs out during a trip, many models have a backup system of opening and starting the vehicle. The backup method typically involves putting the key in a slot or holding it near a specific part of the cockpit, which transfers energy to an electric motor. Some manufacturers have a mechanical key blade that can be used in an emergency to open the trunk or start the vehicle. Battery Life Many newer cars have keyless entry systems as well as push-button starters. These are controlled by a smart fob which communicates with the car via proximity technology. These systems use a tiny transmitter that is powered by a coin-sized lithium battery. It will eventually need to be replaced just like any other battery. Even though smart key fobs are designed to last for a long time, they can suddenly lose power. If the fob's battery is dead it won't be able unlock or start your car even when you place it near the front door. It is not uncommon to see the sensor of a smartkey to drain the battery. The smart key emits the signal each 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 power several years of locking and unlocking signals. The fob can also drain the battery if you keep it close to other devices that emit electromagnetic fields, such as phones and computers. These gadgets emit their own magnetic fields which can cause interference and slow down the fob's transmitter. RepairPal reports that the fob might not function if it's placed too close to the gadgets. Maintenance Smart keys differ from traditional keys made of metal because they use technology to control the locks on your vehicle in addition to performing other functions. It functions by sending an electronic signal from the fob to antennas located inside 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 open or begin it without using the physical key. The fob is now the hub of numerous electronic features on new automobiles. The most obvious are locking and unlocking, remote starter, and chirping sounds to aid in finding your car in a parking spot. Certain fobs let you save different settings for different drivers, and can even remotely open windows and even the sunroof. The transmitter is a complicated device that has an integrated circuit board, and it can be damaged by repeated use or exposure to cold or heat. The transmitter can break if it's damaged by being dropped or smashed. The battery contacts can be bent. These problems can be hard to pinpoint and resolve. It is possible to use your phone to bypass this problem to see if it works. However, you should always keep an extra key in your wallet in a case. You can buy a generic smart key replacement that costs up to 70 percent less than OEM keys and comes with a three-year warranty.