The engineers who work on the Honda Odyssey pay close attention to crash-test ratings. Safety sells minivans, and Honda has long taken pains to maintain the vehicles five-star safety ratings from the government. So they were determined to prevent the type of steel carnage they saw in late 2011, when the crash testers at the Insurance Institute for Highway Safety laboratories here sent a 2012 Odyssey zooming into the corner of a concrete barrier at 40 mph.
The impact obliterated the corner of the van and left a gaping hole where the left front tire had been. Behind that, the driver-side foot well and door frame buckl ed, which would have put a driver at risk of severe leg injuries.
These were the telltale wounds of a "small overlap" crash, in which the front corner of a car strikes an oncoming car, a pole or a tree. Now that the IIHS has made a high rating on its new small-overlap crash test a prerequisite for its stricter Top Safety Pick+ honors, protecting passengers from these crashes has become a pressing challenge for automakers.
And its a tough one -- not least because of the unique nature of the crash. A small-overlap impact misses the steel beams that crumple to cushion a head-on crash, said Chuck Thomas, Hondas chief engineer for vehicle structure research, during a visit to the safety groups Virginia laboratory to witness the 2014 Odysseys crash test.
"The structures which are most capable of absorbing that kind of front-end energy just arent so accessible," he says. "Thats what makes these crashes very severe."
Automakers p refer to save complex engineering changes for the redesign of a model, but brands that have built their reputation around safety had to move quickly. Subaru, for example, bolstered the steel frame of the Legacy sedan and Outback wagon as part of a freshening. Volvo reprogrammed the side curtain airbags in the XC60 crossover. All three passed the IIHS test to earn Top Safety Pick+ honors.
Some automakers -- most notably, Toyota -- have struggled. Americas best-selling car, the Toyota Camry sedan, received a "poor" rating on the small-overlap test for the 2013 model year. So did the Prius V hybrid and RAV4 crossover.
Joe Nolan, head of the IIHS crash laboratory, said it usually takes five or six years -- one full product cycle -- for all models in a particular brand to ace a new crash test. "The programming of an airbag can change pretty quickly," Nolan said. "But a fundamental change to the architecture of the front end of the vehicle? Thats a pretty big deal."
Toyota is racing to catch up. Nolan said the company asked IIHS to test the redesigned Corolla compact, Prius compact hybrid and Highlander SUV -- as well as the Camry, which is getting a freshening for the 2014 model year.
It shows Toyota expects those models to do better on the small-overlap test, he said.
-Honda wasnt surprised by the Odysseys 2011 test results. The company had been working on a tougher front end for the minivan since 2009, when the IIHS released research on small-overlap crashes, Thomas said. But the redesigned Odyssey was a year from its 2010 launch date at that point, and engineers ran out of time. "Its not practical to tear up everything at the last minute," he said.
To strengthen the freshened Odyssey, Honda added high-strength steel supports, and in places switched to hot-formed steel. Honda also added new side-cur tain airbags to keep passengers from being ejected in a crash and switched to an aluminum hood to offset some of the 70-pound weight gain.
At its test here last week, the reworked Odyssey was thrust down a long track before it struck the barrier with a thunderous noise, then pivoted 90 degrees to the right. Inside the passenger cabin, inflated airbags obscured the crash dummy. IIHS is expected to issue its rating in a few weeks.
Meanwhile, from a gallery upstairs, two Toyota engineers looked on, waiting to inspect the wreckage of the rival vehicle.
John Hanson, a spokesman for Toyota, defended the automakers overall safety record, saying it has the most current models that have earned IIHSs regular Top Safety Pick honors, which exclude the small-overlap results.
"Some manufacturers are able to roll out the changes quicker than others," he said. "We want to be able to conform to those new cr iteria, and were going to."
You can reach Gabe Nelson at gnelson@crain.com.
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