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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 as well as start engines without having to insert physical key. They communicate with each other via radiofrequency signals. This helps keep vehicles safe by not allowing hotwiring. Smart keys broadcast unique encrypted signals that block them from being used by other vehicles. Convenience You can lock and unlock your vehicle without the need to insert the key into the ignition slot. Simply press the handle on the door or trunk. Many modern vehicles also offer the ability to remotely start your engine. This is especially useful when you're bringing groceries in or transferring equipment and passengers. This technology is intended to deter theft of vehicles. Smart keys send out encrypted signals instead of a single frequency, similar to a traditional keyfob. This stops other vehicles from being able to receive and respond to the same signal. which explains how Stuff Works Electronics. Some manufacturers also use an electronic chip in the vehicle that detects the unique fingerprint of each key. This ensures that only authorized users are using it. This can be beneficial should you lend your vehicle to family members and friends. Certain smart keys also save user preferences, so that seat, mirrors, and steering wheel adjustments as along with stereo presets can be set automatically when the key is within range of the vehicle. Certain smart keys can be set up to prevent the vehicle from exceeding the speed limit once the key is used to start it. This is a great way to protect new drivers and it's an excellent idea when you have children in the back. Security Traditionally keys were made from metal to open the ignition. With the advent of smart key technology it is no longer necessary. Smart keys are equipped with a special chip that sends a signal to the car's antenna. The signal is subsequently detected by the vehicle when the driver presses on the handle of the door or trunk release. This means that it's not possible to lock your keys inside your car. The signal that the smart key sends to your car is encrypted, which means that only the owner is able to use it. In addition, most models will stop the engine in the event that the vehicle was not started within the last few minutes. This feature is particularly useful if you are in an unsafe location or you need to leave your vehicle for any reason. Additionally, if the smart key battery gets depleted during a trip, many systems have a backup method of opening and starting the vehicle. The backup system usually involves putting the key in the slot or placing it in a particular area of the cockpit. This transfers energy to an electric motor. Certain manufacturers offer a mechanical key blade that can be used in an emergency situation to open the trunk or to start the car. Battery Life Most newer cars have keyless entry and push-button starting systems that are controlled by a smart key fob that uses proximity technology to connect with the car. These systems rely on a small transmitter powered by a lithium coin-sized battery. It will eventually need to be replaced, just like any other battery. Although smart key fobs are made to last for several years but they may suddenly lose power. A dead key fob means that you can't unlock or start your car even if you put it near the front door and the key fob's light blinks. It is not unusual for the sensor of a smartkey to drain the battery. It sends a signal to the car every time you push the button, but most of the time, the smart key isn't doing anything. The battery of a smart key is enough to power several years of locking and unlocking signals. The fob can also drain the battery If you keep it in close proximity to other devices emitting electromagnetic fields, such as phones and computers. These gadgets emit magnetic fields of their own that can interfere with and slow down the fob's transmitter. In certain cases, the fob may even be unable to function if the fob is left too close to these devices, according to RepairPal. Maintenance Unlike the traditional metal car key, a smart one utilizes technology to control the locks on your vehicle and perform some other functions. It operates by transmitting a signal to antennas placed inside and outside your vehicle. They detect the fob's presence and communicate with the car's computer. The car interprets the signal which allows you to turn it on or open it without the physical key. The fob is now a central point for numerous electronic features on new vehicles. The most obvious are locking and unlocking, remote start, and chirping sounds that assist you in finding your vehicle in a parking lot. Some fobs allow you to save various settings for different drivers, and can even remote-operated windows and the sunroof. The fob itself is a sophisticated device with an integrated circuit board, and it can be damaged by hard use or exposure to heat or cold. The transmitter could be damaged if it is damaged by being dropped or smashed. The battery contacts can be bent. These issues can be challenging to determine and solve. You can try using your smartphone to get around the problem and see if that works, but it's always a good idea to keep a spare key inside your pocket in a case. You can purchase a generic replacement for most OEM smart keys, which costs up to 70% less and comes with a three-year higher-quality guarantee than OEM.