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What is a Smart Key Car Key? Smart keys are also known as proximity keys or key fobs. They can be used to unlock doors and start engines without a driver needing to insert physical key. They communicate with each other by using radiofrequency signals. This helps to keep vehicles safe by blocking hotwiring. Smart keys also broadcast unique encrypted signals to stop them from being used by other vehicles owned by drivers. Convenience Instead of inserting the key into an ignition slot to lock and unlock your vehicle by simply pressing the handle of the door or trunk. Modern cars often come with a feature that allows you to start your car from a distance. This is particularly helpful if you're bringing groceries into the vehicle or transporting passengers or equipment. This technology is designed to stop theft of vehicles. Instead of sending a single frequency signal like a regular key fob does, a smart key sends out various encrypted signals to a car's embedded antennas as you are near it. How Stuff Works Electronics explains that this is a way to prevent other cars from receiving and responding to the same signal. Some manufacturers also use a computer-chip in the vehicle which recognizes the unique fingerprint of every key. This helps to ensure that only authorized users use it. This can be helpful if you lend your car to family and friends. Some smart keys also store user preferences, allowing mirrors, seat and steering wheel adjustments, as well as stereo presets can be automatically set when the key is within the range of the vehicle. Certain smart keys can be set up to prevent the vehicle from crossing a certain speed limit when you start the car with that key. This is a great way to ensure the safety of new drivers and also beneficial when you have children in the back. Security Traditionally keys for cars have been made of metal and used to unlock the ignition. Smart key technology eliminates this requirement. Smart keys are equipped with a chip which sends an antenna signal to your car. The vehicle 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 sent by the smart key to your vehicle is encrypted, ensuring that only you can use it. A majority of models also shut down the engine if it isn't started for just a few minutes. This feature is particularly useful when you are in a hazardous area or you have to get out of your vehicle for any reason. Additionally, if a smart key battery runs out during a journey, many systems come with a backup plan to open and start the vehicle. The backup system involves placing the key into a slot or holding it close to a certain area in the cockpit in which energy is transferred to an electric motor. Certain manufacturers have a mechanical key blade that can be utilized in a situation of emergency to open the trunk or start the car. Battery Life The majority of modern cars have keyless entry and push-button start systems which are controlled by a key fob, which uses proximity technology to connect with the car. These systems rely on a small transmitter, powered by a lithium coin-sized battery. As with all batteries it will eventually need replacement. The majority of smart batteries for key fobs last several years However, that doesn't mean they can't go out of power and stop working at any time. If the fob's battery is dead you won't have the ability to unlock or start your car even when you place it near the front door. It is not uncommon to see the transmitter of a smart key to drain the battery. smart roadster key programming sends a signal back to the car every time you press an option, but the majority of the time, the smart key does nothing. The battery of the smart key is sufficient to last for several years of signalling to lock and unlock. The fob will also drain the battery when it is located near other devices which emit electromagnetic fields such as computers and phones. These devices emit their own magnetic fields which can cause interference and slow down the fob transmitter. RepairPal states that the fob may cease to function if placed too close to the gadgets. Maintenance Smart keys differ from traditional metal keys because they use technology to control the locks on your vehicle and perform other functions. It works by sending a signal to antennas placed inside and outside your vehicle. These antennas are able to detect the fob's presence and communicate with the car's computer. The car responds to the signal and allows you to open and start it without the physical key. New vehicles are loaded with the latest electronic technology, and the fob is now an instrument for many of these functions. The most obvious ones are locking and unlocking, remote starting and chirping sounds to help you find your car in a parking space. Some fobs allow you to store specific settings for various drivers, and also open windows remotely and sunroofs. The fob is an intricate electronic device with an integrated board that can be damaged if placed in a position that is too harsh or exposed to extreme heat or cold. The transmitter may break in the event of it being knocked or dropped or smashed. The contacts on the battery can become bent. The issues are often difficult to diagnose and solve. It is possible to use your phone to get around this issue to see if it works. However you should always keep a spare key in your pocket in a case. You can buy an alternative to the majority of OEM smart keys that cost up 70 percent less and comes with a three-year, better-than-OEM warranty.