Only two of nine midsize SUVs get the highest rating in crash tests done by a US insurance industry group.
The Chevrolet Equinox and GMC Terrain, both made by General Motors, received the highest "good" rating from the Insurance Institute for Highway Safety.
The Toyota Highlander got the second-best "acceptable" rating in tests of 2014 models.
But the Jeep Grand Cherokee, Toyota 4Runner and Ford Explorer got "marginal" ratings, while the Kia Sorento, Mazda CX-9 and Honda Pilot all were rated "poor."
The ratings are based on six crash test measurements done by the institute.
Only the Equinox and Terrain got "good" ratings in a front overlap crash that mimics what happens when a car's front corner collides with another vehicle or an object like a utility pole.
In the test, 25 per cent of a vehicle's front end on the driver's side strikes a rigid barrier at 40 mph (64km/h).
The test, instituted in 2012, is more difficult than the US government's frontal crash test, in which a car strikes a rigid barrier head-on at 35 mph (56km/h).
IIHS says hitting only part of the front end makes it harder for cars to manage the energy from a crash.
The test "continues to challenge manufacturers more than a year and a half after its introduction," the institute said in a statement.
The institute uses its crash test scores to prod automakers into adding safety devices or making their cars more crash-resistant.
The Honda Pilot was the worst performer of the group, largely because the driver's space was seriously compromised in the overlap test, the institute said.
