The second generation Ford Escape Hybrid received some minor styling tweaks inside and out. The major cosmetic changes included new bumpers, grille, headlights and taillights to match Ford's new edge style. But the drivetrain was essentially the same mechanically but has had extensive software modifications. For 2009, a larger, more powerful engine was introduced, together with a revised suspension, addition of stability control, the debut of "Sync" voice-control system and a capless fuel filler system. The batteries and other hybrid components in a 2009 Escape hybrid added about 136 kg (300 lbs) to the vehicle. However, the added weight was blamed for an adverse effect in handling. Furthermore, from 2009 onward, rear disc brakes of previous years were swapped for drum brakes, which was criticized as a "strange step backward".