GM vehicles under federal scrutiny after hundreds of reports
GM's eBoost brake-by-wire system under federal investigation after dozens of reported crashes.
The federal government is expanding a safety investigation into a number of vehicles manufactured by General Motors after receiving hundreds of reports of brake failure. The problem affects more than 1.1 million cars, including many of GM's electric vehicles, as well as ones it has built for Honda and Acura. The problem is with the brake-by-wire system (which GM calls eBoost), which can suffer a spindle fracture while driving. GM says that in the event of that happening, the car should still retain a number of critical safety features—antilock brakes, traction control, and stability control—at least until it comes to a complete stop, at which point they become inoperable. But NHTSA's ODI says that it has received many reports that…