Arlington, Virginia – The 2010 Nissan Xterra, Toyota FJ Cruiser and Toyota 4Runner earned “acceptable” ratings, while the Nissan Pathfinder ranked “marginal” in recent roof strength tests conducted by the Insurance Institute for Highway Safety (IIHS).

The test is now part of the Institute’s ratings for vehicle safety; those that earn a Top Safety Pick rating must achieve the highest rating of “good” for roof strength, along with the same rating in front, rear and side impact crash tests, and be equipped with electronic stability control.

“Good” vehicles have roofs that can withstand a force equal to at least four times the vehicle’s weight. An “acceptable” rating in a minimum required strength-to-weight ratio of 3.25, while “marginal” is 2.5. Anything lower is rated “poor.”

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