Only the two-door and four-door Honda Civic models earned the top rating of "good" in the tests done by the Insurance Institute for Highway Safety. The Dodge Dart, Ford Focus, Hyundai Elantra and the 2014 Scion tC got "acceptable" ratings.
But popular models such as the Chevrolet Cruze and Sonic and the Volkswagen Beetle got "marginal" ratings, while the Nissan Sentra and the Kia Soul and 2014 Kia Forte each were rated "poor."
The IIHS ratings are influential because many auto shoppers find them while researching vehicles on the Internet.
The cars were rated for their performance in the insurance institute's "small overlap" test of crashes that cover only 25 percent of a vehicle's front end. These tests, added to the IIHS's evaluations last year, are forcing automakers to bolster the front-end structure of all cars in order to avoid bad publicity from a poor performance.
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Yet such crashes account for nearly a quarter of the frontal collisions that cause serious or fatal injuries to people in the front seats, IIHS says.
The two Civic models and the Dart, Focus, Elantra and Scion tC each earned the IIHS' coveted "Top Safety Pick Plus" award for performing well in multiple tests, including the small offset crash. So far, 25 vehicles of all sizes have earned the award.
Kia said in a statement that the IIHS test goes beyond US government requirements and noted that the Soul and Forte received top safety ratings from the National Highway Traffic Safety Administration. Nissan said it will review the IIHS tests. The Sentra, it said, performed well in other IIHS tests.
GM, which makes Chevrolet, said it's working to improve the structure and restraints in its small cars where technically possible. Volkswagen said its cars exceed all federal safety standards.
The group also measures how well seat belts and air bags protect people. "Good" is the top rating, followed by "acceptable," then "marginal" and "poor.