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Tesla Uses Its Own Scoring System to Tout Crash Test Results

Tesla Motors Inc.'s Model S electric sedan has earned the best overall vehicle safety score among all current model year cars tested by the National Highway Traffic Safety Administration.
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Tesla Motors Inc.'s Model S electric sedan has earned the best overall vehicle safety score among all current model year cars tested by the National Highway Traffic Safety Administration.

Tesla trumpeted the results earlier this week by concocting its own six-star safety rating system and awarding itself 5.4 stars. NHTSA's rating system ranges between one and five stars, and the agency does not rank vehicles within those five categories.

NHTSA says 75 of the 130 vehicles it crash-tested during the 2013 model year earned its top five-star combined score.

But the agency also calculates a separate "combined vehicle-safety score" for manufacturers that does reveal model-to-model differences. Here is where the Model S outperformed all other vehicles reported by NHTSA.

The combined vehicle-safety score indicates the probability of being injured in a vehicle that crashes. In this case, a lower number is better.

Among this year's five-star-rated vehicles, the safety index ranges from 0.42 for the Model S to 0.66 for the Lincoln MKZ large sedan. The worst of the vehicle-safety scores 1.67 is shared by the Chevrolet Silverado and GMC Sierra large pickup trucks.

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