Tesla claims its Model S vehicle is so safe that during a safety test conducted by the National Highway Traffic Safety Administration its roof broke a testing machine.

If this is true, it's no surprise that the Model S was awarded a five-star rating by the NHTSA this week. The vehicle actually scored a 5.4, but the NHTSA doesn't rate a vehicle higher than a 5.

"Of all vehicles tested, including every major make and model approved for sale in the United States, the Model S set a new record for the lowest likelihood of injury to occupants," Tesla said in a blog post this week.

The NHTSA tests vehicles in side impact, frontal impact, rollover risk, and side pole impact tests.

Click here to see how the vehicle did in each test.

Tesla claimed in a blog post that the Model S is the only car to ever receive a rating of "Good" in the side pole test. In the test, the Model S "preserved 63.5 percent of driver residual space."

The IIHS has yet to post crash test results for the Tesla vehicle.

Other electric vehicles have been awarded an overall five-star rating, but it is rare that one scores a perfect 5 in each test.

In comparison, the Ford Focus electric is rated five stars overall, but it received a four in the rollover and frontal-crash tests.

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