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What is a Smart Key Car Key? Smart keys are also referred to as proximity keys or key fobs. They work to unlock doors and to start engines without a driver having to insert physical keys. They communicate by radiofrequency signals. This helps keep vehicles safe by preventing hotwiring. Smart keys also transmit unique encrypted signals to prevent them from being used by vehicles of other drivers. Convenience Instead of inserting keys into the ignition slot instead, you can lock and unlock your vehicle by merely touching the handle of the door or trunk. Many modern vehicles have an option that allows you to remotely start your engine. smart key for car is especially useful if you're bringing in groceries or transporting passengers and equipment. This technology is designed to protect against theft of vehicles. Smart keys send out encrypted signals instead of a single frequency as a regular keyfob does. What does this mean? Stuff Works Electronics explains that this prevents other cars receiving and responding the same signal. Some manufacturers also use a computer chip inside the vehicle that detects the unique fingerprint of every key. This ensures that only authorized users use it. This can be beneficial should you lend your vehicle to family members or friends. Certain smart keys also save user preferences so that the mirrors, seats and steering wheel adjustments as also stereo presets may be set automatically when the key is within the range of the vehicle. To make things easier, some smart keys can be configured to stop the car from exceeding a particular speed limit when it is started with that particular key. This is a great method to protect new drivers, and it's also an excellent idea to have children in the back of the vehicle. Security Traditionally keys were made of metal to open the ignition. Smart key technology eliminates this need. Smart keys come with a specific chip that sends a signal to the 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 inside your vehicle. The signal sent by the smart key to your vehicle is encrypted, ensuring that only you are able to use it. Most models also disable the engine when the car hasn't been started for several minutes. This is especially useful in case you're in a hazardous zone or need to leave the vehicle for reasons other than at a petrol station. Additionally, if a smart key battery fails during a trip, many systems offer a backup method to open and start the vehicle. The backup system involves inserting the key into an opening, or keeping it close to a certain area of the cockpit where the energy is transferred to an electric motor. Some manufacturers also have an emergency mechanical key blade hidden in the key that can be used to open the trunk and begin the car if required. Battery Life Most newer cars have keyless entry as well as push-button starting systems operated by a smart key fob that makes use of proximity technology to communicate with the car. These systems are powered by a small transmitter which is powered by a lithium coin-sized battery. As with all batteries that eventually requires replacement, this one too will need replacement. Although smart key fobs are designed to last for years, they can suddenly lose power. If the fob is dead, you won't be able unlock or start your car even when you place it near the front door. It's not unusual for the transmitter in the smart key to drain the battery. It transmits a signal to the car each time you touch the button, but most times the smart key is not doing anything. The battery of a smart key is enough to last for a long time. unlock and lock signals. The fob can also drain the battery when it is placed near other devices that emit electromagnetic field, such as phones and computers. These devices produce their own magnetic fields, which could interfere with the fob's transmitter, causing it to run slower. In some cases the fob might cease to function entirely when it is placed too close to these devices, according to RepairPal. Maintenance Smart keys differ from traditional keys made of metal in that they use technology to control the security of your vehicle and perform other functions. It operates by sending a signal to the antennas placed inside and outside your vehicle. These antennas are able to detect the fob's signal and communicate with the 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 loaded with the latest electronic technology, and the fob has become an interface for many of these functions. The most obvious features include locking and unlocking your car, remote start and chirping noises to help you locate your vehicle in a parking spot. Some fobs also let you save specific settings for different drivers, and also open windows remotely and sunroofs. The fob itself is a sophisticated device that includes an integrated circuit board, and it can be damaged when exposed to heat or cold. The transmitter can break in the event of it being damaged by a fall or a bang or smashed. The battery contacts may also be bent. These issues can be difficult to diagnose and solve. You can try using your smartphone to get around the issue and see if that helps, but it's a good idea keep a spare key in your pocket just in case. You can purchase an equivalent replacement for the majority of OEM smart keys that cost up 70 percent less and comes with a three-year better-than-OEM guarantee.