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What is a Smart Key Car Key? Sometimes referred to as keys for proximity Key fobs, proximity keys, or remote keys, smart keys are used to unlock doors and start engines without having to insert an actual key. They communicate with radiofrequency signals. In addition, it helps keep cars secure by blocking attempts at hotwiring. Smart keys also transmit unique encrypted signals to stop them from being used by other vehicles driven by drivers. Convenience You can lock and unlock your vehicle without inserting the key into the ignition slot. Simply touch the handle on the door or trunk. Modern cars often have a feature which allows you to start your car wirelessly. This is especially useful when you're bringing groceries in or transporting passengers and equipment. This technology is designed to help to prevent theft of vehicles. Smart keys transmit encrypted signals instead of a single frequency as a regular keyfob does. This stops other vehicles from receiving and responding to the same signal. explains How Stuff Works Electronics. In addition, some manufacturers employ a computer chip inside the vehicle to recognize the unique fingerprints of each key, which helps ensure that only authorized drivers are using it. This is beneficial for when you loan your car to family members and friends. Some smart keys also store user preferences so that the seat, mirrors, and steering wheel adjustments, as well as stereo presets can be automatically set when the key is within the range of the vehicle. Some smart keys can be programmed to stop the vehicle from crossing the speed limit once the key is used to start it. This is a great method to ensure the safety of new drivers and it's a good idea when you have children in the back. Security Traditionally keys for cars have been cut from metal and used to unlock the ignition. Smart keys eliminate this need. Smart keys have a specific chip that transmits signals from the antenna to your car. auto smart key replacement 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 can access it. A majority of models also shut down the engine if it hasn't been running for several minutes. This feature is especially useful in case you're in a hazardous location or need to get out of the vehicle for reasons of any kind, like at a petrol station. A number of systems also include the option of a backup system to open and starting the car when the battery of the smart key runs out while on a ride. The backup method involves putting the key in an opening, or keeping it close to a specific space in the cockpit in which energy is transferred to an electric motor. Certain manufacturers have a mechanical key blade that can be used in an emergency to open the trunk or to start the vehicle. Battery Life The majority of modern cars have keyless entry systems and push-button starters. They are controlled by a smart key fob that communicates with your car using proximity technology. These systems use a small transmitter, powered by a lithium coin-sized battery. It will eventually need to be replaced as with any other battery. Although smart key fobs are designed to last for years however, they can suddenly lose power. If the fob is dead you won't have the ability to unlock or start your car holding it near the front door. It is not uncommon to see the transmitter of a smart key drain the battery. The smart key will send the signal each time you press the button. But most of the times, it doesn't do anything. A single signal to lock or unlock takes only a tiny amount of the fob's battery power and that's several years worth of signals worth of battery life in the average smart key battery. The fob will also drain the battery if you keep it close to other devices emitting electromagnetic fields, like phones and computers. These devices emit their own magnetic fields, which can interfere and slow down the fob's transmitter. RepairPal states that the fob may not function if it's placed too close to the gadgets. Maintenance Smart keys are different from traditional keys because they use technology to control the locks of your vehicle and perform other functions. It works by sending signals from the fob to antennas inside and outside the vehicle. The antennas pick up the signal and then communicate with the computer in your car. The car interprets the signal permitting you to start or open it without the physical key. The fob is now a hub of numerous electronic features found in modern automobiles. The most obvious ones are locking and unlocking, remote starting and chirping sounds that aid in finding your car in a parking spot. Certain fobs let you store various settings for various drivers, and remotely open windows as well as the sunroof. The transmitter itself is a complex device with an integrated circuit board and it is prone to being damaged through repeated use or exposure to cold or hot. The transmitter could be damaged if it is hit or dropped, and the battery contacts can also become bent. These problems can be difficult to determine and fix. Try using your smartphone to get around the problem 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 alternative to the majority of OEM smart keys, which costs up to 70 percent less and comes with a three-year, more than OEM guarantee.