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What is a Smart Key Car Key? Smart keys are also referred to as proximity keys or key fobs. They function to unlock doors and to start engines without having to insert physical keys. They communicate with one another using radiofrequency signals. Apart from that, it helps to protect cars by preventing hotwiring attempts. Smart keys emit unique encrypted signals that keep them from being accessed by other vehicles. Convenience You can lock and unlock your vehicle without inserting the key into the ignition slot. Simply touch the handle of the door or trunk. Many modern vehicles also offer the option to start your engine remotely. replacement smart car key is especially helpful when you're bringing groceries in or transporting passengers and equipment. This technology is designed to help prevent vehicle theft. Smart keys send out encrypted signals instead of a single frequency similar to a traditional keyfob. What does this mean? Stuff Works Electronics explains that it is impossible for other cars to receive and responding to the same signal. Certain manufacturers also have a computer chip inside the vehicle that recognizes the unique fingerprints of each key. This can help ensure that only authorized users are using it. This is particularly useful in the event that you lend your car to family and friends. Some smart keys can also store user preferences, so that mirrors, seat and steering wheel adjustments, as and stereo presets can be automatically set when the key is within the range of the vehicle. Certain smart keys can be programmed to stop the vehicle from going over a certain speed limit when the key is used to start it. This is a great method to protect new drivers, and it's also beneficial for families with children in the back of the vehicle. Security Traditionally keys for cars have been made from metal and used to unlock the ignition. Smart key technology eliminates this requirement. Smart keys have an electronic chip that transmits signals to the car's antenna. The signal is subsequently received by the vehicle whenever the driver presses on the door handle or trunk release. It is now impossible to lock the keys in your vehicle. The signal that the smart key sends to your car is encrypted, which means that only the owner can use it. Most models also disable the engine when the car hasn't been running for a few minutes. This feature is particularly useful in case you're in a hazardous area or you have to leave the vehicle for reasons other than at a petrol station. A number of systems also include an alternative system for opening and starting the car in case the battery of the smart key runs out while you are on a ride. The backup method involves putting the key into a slot, or holding it close to a certain space in the cockpit where energy is transferred to an electric motor. Certain manufacturers offer a mechanical key blade that can be used in an emergency to open the trunk or start the car. Battery Life Most newer cars have keyless entry and push-button starting systems which are controlled by a key fob that uses proximity technology to connect with the car. These systems use a small transmitter, powered by a lithium coin-sized battery. It will eventually require to be replaced just like any other battery. Although smart key fobs are designed to last for many years however, they can suddenly lose power. If the fob's battery is dead you won't be able unlock or start your car even holding it near the front door. It's not uncommon to find the transmitter in the smart key to drain the battery. The smart key will send a signal every time you press the button. But the majority of time, it doesn't do anything. The battery of a smart key can be used to last for several years of locking and unlocking signals. The fob can also drain the battery if you keep it close to other devices emitting electromagnetic fields, such as phones and computers. These gadgets 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 are different from traditional metal keys because they use technology to control the locks on your vehicle and perform other functions. It works by transmitting an indication from the fob to antennas within and outside the vehicle. These antennas detect the signal and communicate with the computer in your car. The car interprets the signal allowing you to start or open it without the physical key. New cars are loaded with modern electronic features and the fob has become an instrument for many of these functions. The most obvious uses are locking and unlocking your car, remote starting and chirping to help you locate your car in a parking space. Some fobs also let you store specific settings for various drivers and open windows remotely and sunroofs. The transmitter itself is a sophisticated device that has an integrated circuit board and it is susceptible to damage by hard use or exposure to heat or cold. The transmitter could be damaged if knocked or dropped. The battery contacts may be bent. These issues can be challenging to pinpoint and solve. You can try using your phone to bypass the issue and see if it works however it's always a good idea to keep a backup key in your pocket just in case. You can purchase an equivalent replacement for the majority of OEM smart keys for up 70% less and comes with a 3-year, better-than-OEM warranty.