Audi's e-Tron Sportback features brake-by-wire. What is brake-by-wire, and is it safe? In this video we'll look at the technology and engineering involved with brake-by-wire, talk about why it's done, what benefits it has, and what failsafes exists in case of emergency situations. Brake-by-wire ultimately uses electronic control of the disc brakes. But if things go wrong, there's still a way to stop the car. Check out the video to learn all about it!