Tesla S Sets NHTSA Crash Testing Score Record, Goes to Eleven (Well, 5.4 Stars to Be Exact), Breaks Roof Testing Machine
Chart courtesy of Tesla Motors
While General Motors is thumping its chest because the new fullsize pickups from Chevrolet and GMC are the first to earn an overall 5 star crash test rating since the standards were upgraded two years ago, Tesla is trumpeting the NHTSA crash testing results for their Model S, saying that the luxury EV achieved the best safety rating ever of any car tested by the highway safety agency. Not only did the Model S earn an overall five-star rating, but the Model S earned 5 stars in every testing category. While 5 is the maximum rating that NHTSA publishes, manufacturers are provided with the overall Vehicle Safety Score, whose scale goes higher, and Teslas says that the Model S’ VSS was 5.4 stars, the highest ever achieved.
The EV company says that score is the best of any recorded by every car sold in the United States, a new record for the lowest likelihood of injury to occupants. It also is better than all SUV and minivans as well. The company attributes the high scores in part to a more effective front crush zone made possible by the fact that there is no engine up front in the Tesla, which is driven by a fairly compact electric motor mounted near the rear axle. Another feature that the company claims makes the Tesla safer is a double bumper installed on cars ordered with an optional third row seat for children. Side impact performance, significantly better than the five star rated Volvo S60, is attributed to multiple aluminum extrusions nested in the Model S’ side rails.
The Model S performed particularly well in the rollover test because the location of the vehicle’s traction battery under the passenger compartment results in a very low center of gravity. During normal testing the Model S could not be made to roll over so the test had to be modified. The results indicate that the Model S will protect its passengers from rollover risk about 50% better than other top rated vehicles.
Should the Model S be made to roll over, the roof should protect the occupants well. During roof crush testing, the Model S broke the testing machine after withstanding more than 4 times the force of gravity. Tesla attributes that high performance to B pillar reinforcements attached with aerospace graded fasteners.
In announcing the results, Tesla said that while their initial testing showed that the Model S would achieve the 5 star rating when tested in standard locations, they verified that even if the car was tested at its weakest points, it would still earn the maximum rating. No doubt because fire safety has been an issue that was raised with the Chevy Volt and the Fisker Karma, Tesla’s press release on the Model S crash results also stressed that the car’s lithium-ion battery experienced no fires before, during or after NHTSA testing. The “after” was a reference to a fire that broke out in a Chevy Volt three weeks after it was crash tested by NHTSA in a fully charged condition.
Tesla also said that they are unaware of any fatalities that have happened in real world collisions involving either the Model S or the Tesla Roadster.
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This level of improved safety capability makes me wonder about the impact of this advancement on other makes of cars being sold today and perhaps in the last ten years. The reason for this is the recent semi-involuntary recall of Jeep products to install a tow hitch to make the rear mounted fuel tank safer. While Jeep conformed to accepted standards at the time of manufacture, they were at least ostracized (sp?) into upgrading past-production vehicles. If this same kind of societal push is applied to vehicles that don't live up to Tesla's proven state-of-the-art safety level, will recalls for vehicles that haven't lived up to the new demonstrated capability now be issued for the installation of roll bars and side bumpers?
Has the green star rating at the right hand side of the chart been inverted and should it start with a one instead of a zero?