The sedan earned 'good' ratings across the board, thanks to improved headlights and front crash prevention.

The Insurance Institute for Highway Safety has praised the 2018 Toyota Camry for its across-the-board 'good' ratings in every assessment category, earning Top Safety Pick Plus honors for the fourth year running.

The TSP+ title requires top marks in the small overlap, moderate overlap, side, roof strength and head restraints tests, along with an 'advanced' or 'superior' rating for crash prevention and 'acceptable' or 'good' headlights.

"Among midsize cars that meet those criteria, the 2018 Camry stands at the top," the institute said. "Its standard front crash prevention system is rated superior, and its best headlights are rated good."

The 2018 Subaru Legacy is not far behind, though its best-performing emergency braking system is not a standard feature.

Notably, the IIHS tests do not show a single vehicle in any segment that includes 'good' headlights as standard equipment. Automakers will face increasing pressure to improve lighting as the IIHS tightens its Top Safety Pick qualification criteria in coming years.