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What is a Smart Key Car Key? Sometimes referred to as proximity keys Key fobs, proximity keys, or remote keys, smart keys work to unlock doors and start engines without having to insert the physical key. They communicate with radiofrequency signals. This helps to keep vehicles safe by preventing hotwiring. Smart keys broadcast unique encrypted signals that block access to other vehicles. Convenience You can lock and unlock your vehicle without needing to insert the key into the ignition slot. Simply touch the handle on the trunk or door. Modern cars often include a feature that permits you to start your car via the internet. This is especially useful if you're bringing in groceries or transporting passengers, or equipment. This technology is intended to deter theft of vehicles. Smart keys send out encrypted signals instead of a single frequency as a regular keyfob does. This stops other vehicles from receiving and responding to the same signal. This explain how Stuff Works Electronics. Additionally, some companies use a computer chip in the vehicle to recognize the unique fingerprint of each key, which makes sure that only authorized drivers use it. This is useful should you lend your vehicle to family and friends. Some smart keys also store user preferences, allowing seat, mirrors and steering wheel adjustments as also stereo presets may be set automatically when the key is within reach of the vehicle. Certain smart keys can be set up to prevent the vehicle from crossing the speed limit when started with that key. This can help keep unexperienced drivers safe and can be useful if you have young children in the back of the vehicle. Security Traditionally keys for cars were made from metal and used to unlock the ignition. With the advancement of smart keys this is no longer the case. Smart keys are equipped with a chip that transmits signals from the antenna to your car. This signal is then received by the vehicle whenever the driver presses on the door handle or trunk release. This means that it's not possible to lock your keys in your car. The smart key's signal to your vehicle is encrypted to ensure that only you have access to it. The majority of models also shut off the engine when the car hasn't been running for some time. This feature is especially useful if you are in a risky area or have to leave your vehicle for any reason. Additionally, if the smart key battery runs out during a journey, many models have a backup system to open and start the vehicle. The backup method typically involves placing the key into the slot or placing it near a specific area of the cockpit. This transfers energy to an electric motor. Some 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 Most newer cars have keyless entry and push-button starting systems that are controlled by a smart key fob, which uses proximity technology to connect with the car. These systems are powered by a tiny transmitter that is powered by a coin-sized lithium battery. It will eventually need to be replaced just like any other battery. Most smart key fob batteries last for a long time however, that doesn't mean they can't be unable to function and shut down at any time. A dead fob means you can't unlock or start your car even if you put it near the front door, and the key fob light flashes. It's not unusual for the transmitter of the smart key to drain the battery. The smart key emits an alert each when you press a button. However, most of the times, it doesn't do anything. One single lock/unlock button takes only a tiny amount of the battery power in the fob and, therefore, there's many years of signals' worth of battery life in the average smart key battery. new smart car key will also drain the battery If you keep it in close proximity to other devices that emit electromagnetic fields, such as phones and computers. These devices produce their own magnetic fields, which could interfere with the fob's transmitter and cause it to work slower. In some cases the fob might be unable to function when the fob is placed too close to these devices, according to RepairPal. Maintenance Smart keys are different from traditional keys in that they use technology to control the locks of your vehicle as well as perform other functions. It functions by sending an indication from the fob to antennas in and outside the vehicle. These antennas sense the signal and communicate with the computer in your car. The car responds to the signal and allows you to open or start it without the physical key. The fob is now a central point for many electronic features that are now available in new vehicles. The most obvious are locking and unlocking, remote starter, and chirping sounds that help you find your car in a parking space. Certain fobs let you save different settings for different drivers, and can even remotely open windows and even the sunroof. The fob is an elaborate electronic device with an integrated circuit board that can be damaged if it is used too hard or exposed to extreme heat or cold. The transmitter could be damaged if dropped or banged. The battery's contacts can be bent. These issues can be challenging to pinpoint and solve. You can try using your phone to avoid the issue and see if that helps however it's best to keep a spare key in your pocket to use in case. You can buy a generic replacement for the majority of OEM smart keys that cost up 70 percent less and comes with a 3-year, more than OEM guarantee.