Abstract
Indicative of the rapid technological progress in automotive sensors, automobile has advanced very much and changed to environmentally friendly cars that are capable of obtaining higher gas mileage and are safer and more comfortable. The same thing can be described from view points of the number of sensors used in vehicle. A current luxury car contains approximately 100 sensors although cars in the early 50′s didn′t have any sensors. This paper contains how the automotive systems and sensors are used in cars, how the system control automotive functions, and how the sensors are made. In this paper, future roles of MEMS technologies in automotive electronics are also discussed.