Official: Tesla Model S Becomes World’s Safest Vehicle According to NHTSA Test Results (w/videos)

4 years ago by Eric Loveday 8

Tesla Model S Highest Ever Tested by NHTSA

Tesla Model S Highest Ever Tested by NHTSA

As we pointed out when first reporting on the NHTSA crash test results for the Tesla Model S, never have we seen a vehicle survive the various tests so intact.

As it turns out, we were spot on.

Model S Crash Test Frontal

Model S Crash Test Frontal

After taking some time to pour over all the available NHTSA data, Tesla Motors announced today that its Model S is the pinnacle of safety.

Tesla’s press release (certain sections bolded by us to highlight their importance) pasted below tells the whole story, but for what it’s worth, we knew this to be the case prior to the automaker mentioning a single word.  6 stars?  Not quite, but we knew it was over 5.   You could say a little birdie told us so.

Tesla Model S Achieves Best Safety Rating of Any Car Ever Tested

Sets New NHTSA Vehicle Safety Score Record

Monday, August 19, 2013

Palo Alto, CA — Independent testing by the National Highway Traffic Safety Administration (NHTSA) has awarded the Tesla Model S a 5-star safety rating, not just overall, but in every subcategory without exception. Approximately one percent of all cars tested by the federal government achieve 5 stars across the board. NHTSA does not publish a star rating above 5, however safety levels better than 5 stars are captured in the overall Vehicle Safety Score (VSS) provided to manufacturers, where the Model S achieved a new combined record of 5.4 stars.

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. While the Model S is a sedan, it also exceeded the safety score of all SUVs and minivans. This score takes into account the probability of injury from front, side, rear and rollover accidents.

Model S Side Pole Impact

Model S Side Pole Impact

The Model S has the advantage in the front of not having a large gasoline engine block, thus creating a much longer crumple zone to absorb a high speed impact. This is fundamentally a force over distance problem – the longer the crumple zone, the more time there is to slow down occupants at g loads that do not cause injuries. Just like jumping into a pool of water from a tall height, it is better to have the pool be deep and not contain rocks. The Model S motor is only about a foot in diameter and is mounted close to the rear axle, and the front section that would normally contain a gasoline engine is used for a second trunk.

For the side pole intrusion test, considered one of the most difficult to pass, the Model S was the only car in the “good” category among the other top one percent of vehicles tested. Compared to the Volvo S60, which is also 5-star rated in all categories, the Model S preserved 63.5 percent of driver residual space vs. 7.8 percent for the Volvo. Tesla achieved this outcome by nesting multiple deep aluminum extrusions in the side rail of the car that absorb the impact energy (a similar approach was used by the Apollo Lunar Lander) and transfer load to the rest of the vehicle. This causes the pole to be either sheared off or to stop the car before the pole hits an occupant.

The rear crash testing was particularly important, given the optional third row children’s seat. For this, Tesla factory installs a double bumper if the third row seat is ordered. This was needed in order to protect against a highway speed impact in the rear with no permanently disabling injury to the third row occupants. The third row is already the safest location in the car for frontal or side injuries.

Model S Gets Flipped for Safety After Crash Tests

Model S Gets Flipped for Safety After Crash Tests

The Model S was also substantially better in rollover risk, with the other top vehicles being approximately 50 percent worse. During testing at an independent facility, the Model S refused to turn over via the normal methods and special means were needed to induce the car to roll. The reason for such a good outcome is that the battery pack is mounted below the floor pan, providing a very low center of gravity, which simultaneously ensures exceptional handling and safety.

Of note, during validation of Model S roof crush protection at an independent commercial facility, the testing machine failed at just above 4 g’s. While the exact number is uncertain due to Model S breaking the testing machine, what this means is that at least four additional fully loaded Model S vehicles could be placed on top of an owner’s car without the roof caving in. This is achieved primarily through a center (B) pillar reinforcement attached via aerospace grade bolts.

The above results do not tell the full story. It is possible to game the regulatory testing score to some degree by strengthening a car at the exact locations used by the regulatory testing machines. After verifying through internal testing that the Model S would achieve a NHTSA 5-star rating, Tesla then analyzed the Model S to determine the weakest points in the car and retested at those locations until the car achieved 5 stars no matter how the test equipment was configured.

The Model S lithium-ion battery did not catch fire at any time before, during or after the NHTSA testing. It is worth mentioning that no production Tesla lithium-ion battery has ever caught fire in the Model S or Roadster, despite several high speed impacts. While this is statistically unlikely to remain the case long term, Tesla is unaware of any Model S or Roadster occupant fatalities in any car ever.

The graphic below above shows the statistical Relative Risk Score (RSS) of Model S compared with all other vehicles tested against the exceptionally difficult NHTSA 2011 standards. In 2011, the standards were revised upward to make it more difficult to achieve a high safety rating.

Model S 5 Star

Model S 5 Star

frontal

Model S Frontal

Side Tests

Side Tests

Rollover Test

Rollover Test

 

 

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8 responses to "Official: Tesla Model S Becomes World’s Safest Vehicle According to NHTSA Test Results (w/videos)"

  1. Bloggin says:

    WOW….The American automobile company Tesla has become the new Volvo.

    I see other auto manufacturers scrambling right now to ramp up their plans for underbody battery EVs with axle based electric motors to compete with Tesla’s safety ratings.

    Tesla is the future….

  2. Foo says:

    I love it. Telsa is now known to be the best AND safest vehicle ever made. Behind closed doors, this has got to have the other car manufacturers taking notice (talking to you, Volvo) if they weren’t already.

    The incumbents could have done the same — but they didn’t. Why didn’t they? Because they are complacent and no longer truly innovative. Internally, the ones that aren’t arrogant must be sweating a little and taking a gulp.

  3. danwat1234 says:

    What about the small overlap crash test?
    The car has to do decently well in the small overlap crash test in order to be Top Safety Pick + rated, to get the “+” at the end. I hope it did!

    1. Eric Loveday says:

      That’s IIHS that does small overlap. IIHS has yet to test the Model S… Soon we hope.

  4. David Murray says:

    Elon Musk said he set out to make the best car ever, not just the best electric car. It looks like he has succeeded.

  5. Rick says:

    I’d get one, if it didn’t cost more than my first house.

  6. Ambulator says:

    If you used the same proportions, six stars should start at around 0.45 on the relative risk scale. With Tesla at 0.43 I’d say they deserve that extra star.

  7. MrEnergyCzar says:

    So much for Tesla being a “loser”…

    MrEnergyCzar