At the center of the inquiry are two crashes that resulted in fatalities, both occurring at night and involving Mach-Es traveling at freeway speeds with BlueCruise engaged. In these cases, the system failed to detect stationary vehicles, leading to deadly collisions.

Investigation opened last year has been stepped-up to an engineering analysis due to concerns over Mach-Es failing to spot stationary vehicles

Preliminary findings show that Ford's BlueCruise hands-free driver assistance feature fails to detect stopped objects at night at freeway speeds.