Which component is NOT a major part of the vehicle's computer system?

The correct answer highlights that calipers are not part of the vehicle’s computer system. In the context of a vehicle's computer system, major components typically include the Engine Control Unit (ECU), which acts as the brain of the vehicle, processing data from various sensors and managing engine operations. Sensors play a crucial role in monitoring different aspects of vehicle performance, such as temperature, speed, and emissions, sending vital information to the ECU for processing.

A wiring harness is essential as it connects all electronic components and ensures effective communication between the various elements of the vehicle’s computer system.

Calipers, on the other hand, are mechanical components found in the braking system of a vehicle. Their function is to house the brake pads and apply pressure to the brake discs to slow down or stop the vehicle. While they are critical for safety and performance, they do not participate in the computer-driven operations or data processing that characterizes the vehicle's computer system. This distinction is key to understanding the roles of different components within a vehicle.