The throttle body that is commonly referred to as drive-by-wire is which type?

• A. Stock
• B. Aftermarket
• C. Electronically driven
• D. Mechanically driven

Answer: (C)

The concept being tested is how a drive-by-wire throttle is operated. In a drive-by-wire setup, there’s no direct mechanical linkage between the accelerator pedal and the throttle plate. Instead, the pedal position is sensed and sent as an electronic signal to the engine control unit, which then uses an electronic throttle actuator to move the throttle opening. This means the throttle body is controlled electronically, not by a cable or rod.

That’s why the correct description is electronically driven. Options that refer to stock or aftermarket don’t describe how it operates, and mechanically driven would imply a physical linkage, which is contrary to drive-by-wire.