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What is a Smart Key Car Key? Sometimes referred to as keys that are in proximity Key fobs, proximity keys, or remote keys, smart keys work to unlock doors and start engines without having to insert a physical key. They communicate with radiofrequency signals. This helps keep vehicles secure by not allowing hotwiring. Smart keys also transmit unique encrypted signals to prevent them from being used by vehicles of other drivers. Convenience You can lock and unlock your vehicle without having to insert the key into the ignition slot. Simply press the handle on the door or trunk. A majority of modern cars also come with a feature that lets you to start your car wirelessly. This is especially helpful when you're taking groceries home or transporting equipment and passengers. This technology is designed to stop theft of vehicles. Instead of transmitting a single frequency signal, as a standard key fob, a smart key sends out an array of encrypted signals to the car's antennas embedded in it when you walk towards it. How Stuff Works Electronics explains that it is impossible for other cars to receive and responding the same signal. In addition, some manufacturers employ a computer chip inside the vehicle to identify the unique fingerprint of each key, which helps ensure that only authorized drivers are using it. This is helpful when you lend your car to family and friends. Some smart keys can also store user settings, so that the steering wheel, seat mirror, seat and stereo presets can be automatically set when the key is in range of the car. Some smart keys can also be set up to prevent the vehicle from going over a certain speed limit when the key is used to start it. This can help keep inexperienced drivers safe and helpful if you have young children in the back of the vehicle. Security Traditionally, keys were cut from metal to open the ignition. Smart key technology eliminates this requirement. Smart keys are equipped with an electronic chip that transmits the signal to the car's antenna. This signal is then recognized by the vehicle when the driver presses a button on the handle on the door or trunk release. This means that it's not possible to lock your keys in your car anymore. The signal that the smart key sends to your car is encrypted, meaning that only the owner can use it. In addition, most models will stop the engine if the vehicle hasn't been started within the last few minutes. G28CarKeys is especially useful in case you're in a hazardous zone or need to leave the vehicle for any reason, such as at a gas station. A lot of systems also have an alternative system for opening and starting the car in case the battery of the smart keys runs out during a ride. The backup system involves inserting the key into the slot, or putting it close to a certain location in the cockpit, where energy is transferred to an electric motor. Some manufacturers also have an emergency mechanical key blade hidden inside the key that can be used to open the trunk and start the car should it be needed. Battery Life The majority of modern cars have keyless entry systems as well as push-button starters. These are controlled by a smart device that communicates with the car using proximity technology. These systems utilize a tiny transmitter, powered by a coin-sized lithium battery. Like all batteries that eventually requires replacement, this one too will need replacement. The majority of smart batteries for key fobs last for several years however that doesn't mean they can't lose power and stop working abruptly. If the fob is dead, you won't be able to unlock or start your car even when you place it near the front door. It is not unusual for the smart key's transmitter to drain the battery. It sends a signal back to the car each time you touch the button, but most of the time, the smart key does nothing. The battery of a smart key is enough to power several years of locking and unlocking signals. The fob may also drain the battery if located near other devices which emit electromagnetic fields such as phones and computers. These devices create their own magnetic field which could affect the fob's transmitter, causing it to function slower. RepairPal reports that the fob can stop working if it is placed too close to the gadgets. Maintenance In contrast to the traditional car key, a smart key makes use of technology to control the locks on your vehicle and perform some other functions. It operates by sending a signal to the antennas that are placed both inside and outside your vehicle that detect the fob's presence and communicate with the car's computer. The car then interprets the signal and allows you to open or begin it without using the physical key. The fob is now a hub of many electronic features that are now available in new vehicles. The most obvious ones are locking and unlocking, remote start, and chirping sounds that aid in finding your vehicle in a parking lot. Some fobs also let you store specific settings for different drivers and remotely open windows and sunroofs. The fob is an intricate electronic device that has an integrated board. It can be damaged if it is utilized too vigorously or exposed to extreme cold or heat. The transmitter may be damaged if damaged by being dropped or smashed. The battery contacts could be bent. The issues are often difficult to determine and repair. You could try using your smartphone to get around the issue and see if that helps, but it's best to keep a backup key in your pocket, just in case. You can buy a generic smart key replacement that's up to 70 percent less than OEM keys and comes with a 3-year warranty.