The X stands as a placeholder for specific automotive functions like throttle, steering, braking, or shifting. In these systems, a sensor reads the driver input at the pedal or wheel and sends a digital signal to a control module, which then commands an actuator to perform the physical work. This architecture eliminates traditional steel cables, hydraulic lines, and steering columns to save weight and enable advanced driver assistance features.
Heard on the job
We need to recalibrate the steering angle sensor since this chassis is entirely X-by-wire.
Insider tip
The most common adoption of this technology is throttle-by-wire, which is standard on almost all newer vehicles, while steer-by-wire and brake-by-wire are still mostly found on high-end or electric platforms.