Learning about this system will pay off. Smart Key systems are not going to go away any time soon. In fact, they are likely to appear on more and more models, and their level of complexity is likely to increase as vehicle-customization features are added. Smart Key systems currently provide passive entry and starting. Future systems may passively customize the car to match each driver’s preferences. Imagine a car that adjusts the seats, mirrors, climate control,audio, suspension, shift timing, and throttle response for each driver, before they even get in the car!