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Tesla Model S Misses Top Safety Pick+ In Latest Crash Test

6 July 2017 - InsideEVs

Tesla Model S Misses Top Safety Pick+ In Latest Crash Test

The Tesla Model S has come under some scrutiny lately from the IIHS for its crash test results.

In February, the Insurance Institute for Highway Safety said the electric vehicle only scored an "acceptable" rating because the seat belt let the dummy move too much in the small overlap test. Despite changes, when IIHS re-tested the Model S recently, the same problem happened, and so the "acceptable" rating remains on that front.

IIHS crashed two Model S vehicles and scored how they protected the battery pack. In two words: not great. In more words (from the IIHS release):

Although the two tested vehicles had identical structure, the second test resulted in greater intrusion into the driver's space because the left front wheel movement wasn't consistent. Maximum intrusion increased from less than 2 inches to 11 inches in the lower part and to 5 inches at the instrument panel in the second test. The first test resulted in a good rating for structural integrity, while the second test resulted in an acceptable structural rating. The two tests' structural ratings were combined, resulting in acceptable structure and an acceptable rating overall for the Model S.

The greater deformation in the second test also resulted in damage to the left front corner of the battery case. The deformation was limited to an area that didn't contain battery cells in the tested vehicle, so this damage didn't affect the rating. Higher-performance variants of the Model S could have battery cells in this area, but, according to Tesla, they also have different structure. They haven't been tested separately and aren't covered by this rating.

When the Model S failed to get the top score in the IIHS test last time, Tesla said it would fix the problem and expected to be named a Top Safety Pick+. Despite the fact that that didn't happen, the company said in a statement to InsideEVs that the Model S, "received the highest rating in IIHS's crash testing in every category except for one, the small overlap front crash test, where it received the second highest rating available." Tesla also said that it considered the U.S. government to be "the most objective and accurate" body to independently test a vehicle's safety, and it found that the Model S and the Model X were," the two cars with the lowest probability of injury of any cars that it has ever tested, making them the safest cars in history." You can read Tesla's full statement below.

All of these new results were part of a broader set of IIHS tests of larger sedans. While the EV (and the Ford Taurus and the Chevrolet Impala) didn't do well, the Lincoln Continental, the Mercedes-Benz E-Class, and the Toyota Avalon all got the coveted Top Safety Pick+ designation, the highest possible score. The Continental's result is particularly impressive, since this is an all-new vehicle that aced this test on the first try.

 

IIHS large sedan crash test rating

Press Release:

Three large cars join ranks of IIHS TOP SAFETY PICK+ winners

ARLINGTON, Va. — The Lincoln Continental, the Mercedes-Benz E-Class and the Toyota Avalon come out at the top of a group of six large cars recently evaluated by the Insurance Institute for Highway Safety.

The three cars qualify for TOP SAFETY PICK+, the Institute’s highest award. The Tesla Model S, the Chevrolet Impala and the Ford Taurus fall short of any award because they each earn only an acceptable rating in the small overlap front test.

“This group of large cars includes some with stellar ratings, but our small overlap front test remains a hurdle for some vehicles,” says David Zuby, IIHS executive vice president and chief research officer.

Vehicles qualify for either the TOP SAFETY PICK or TOP SAFETY PICK+ award if they have good ratings from IIHS in five crashworthiness tests — small overlap front, moderate overlap front, side, roof strength and head restraints — and an available front crash prevention system that earns a superior or advanced rating. To qualify for TOP SAFETY PICK+, a vehicle also must come with good or acceptable headlights.

The 2017 Continental is an all-new vehicle with a revived model name. It replaces the Lincoln MKS. The Continental’s optional front crash prevention system earns a superior rating. When equipped with the system, the car avoided collisions in IIHS track tests at 12 mph and 25 mph. The system also has a forward collision warning component that meets National Highway Traffic Safety Administration (NHTSA) criteria.

The Continental’s LED projector headlights, an option on the Reserve trim line, earn a good rating, providing ample lighting on a straightaway and most kinds of curves. They can be obtained with high-beam assist, a feature that automatically switches between high beams and low beams, depending on the presence of other vehicles. However, the vehicle is also available with high-intensity discharge (HID) lights that earn a poor rating.

The E-Class was completely redesigned for 2017. It has two different front crash prevention systems, one standard and the other optional. Both earn superior ratings, avoiding collisions in the track tests at both speeds and earning credit for forward collision warning that meets NHTSA criteria.The E-Class is available with two different headlight systems. One earns a good rating, while the other is acceptable. The good-rated headlights, which come on the E-300 trim when equipped with the Premium II or Premium III package, earn the highest score of any headlights IIHS has rated. The low beams provide enough light on the straightaway and all curves, though they create a bit of glare for oncoming drivers. The high beams provide fair visibility on the left side of the straightaway but good visibility everywhere else. The good-rated headlights also come with high-beam assist.

The Avalon also joins the ranks of the TOP SAFETY PICK+ winners. The car was previously recognized as a TOP SAFETY PICK winner. It fell short of the highest award because it had only marginal and poor headlights available. Toyota improved the aim of the headlights on Avalons built after March. As a result, the Limited and Hybrid Limited trim lines now come with acceptable-rated headlights. Other trims have marginal headlights, but none are poor anymore.

Toyota wasn’t the only company to try to boost its car’s standing with midyear improvements. The Tesla Model S initially had earned an acceptable rating in the small overlap test, which represents the type of crash that occurs when the front driver-side corner of a vehicle hits a tree or utility pole or collides with another vehicle. The main problem with the performance of the Model S was that the safety belt let the dummy’s torso move too far forward, allowing the dummy’s head to strike the steering wheel hard through the airbag.

Tesla made changes to the safety belt in vehicles built after January with the intent of reducing the dummy’s forward movement. However, when IIHS tested the modified Model S, the same problem occurred, and the rating didn’t change.

Although the two tested vehicles had identical structure, the second test resulted in greater intrusion into the driver’s space because the left front wheel movement wasn’t consistent. Maximum intrusion increased from less than 2 inches to 11 inches in the lower part and to 5 inches at the instrument panel in the second test. The first test resulted in a good rating for structural integrity, while the second test resulted in an acceptable structural rating. The two tests’ structural ratings were combined, resulting in acceptable structure and an acceptable rating overall for the Model S.

The greater deformation in the second test also resulted in damage to the left front corner of the battery case. The deformation was limited to an area that didn’t contain battery cells in the tested vehicle, so this damage didn’t affect the rating. Higher-performance variants of the Model S could have battery cells in this area, but, according to Tesla, they also have different structure. They haven’t been tested separately and aren’t covered by this rating.

The Model S is only available with headlights that earn a poor rating and hasn’t been rated yet for front crash prevention. While automatic braking comes standard, the software for the feature was only recently activated.
Before this round of testing, the Chevrolet Impala hadn’t been put through all the Institute’s evaluations since it was redesigned in 2014, and it has never been rated for small overlap protection. The 2017 model earns an acceptable rating for small overlap protection and good ratings in the other crashworthiness tests.

In the small overlap crash, the Impala’s structure held up reasonably well, with maximum intrusion of 4 inches at the lower door-hinge pillar. The dummy’s head hit the front airbag, but then slid off the left side, leaving the head partially unprotected. Measures taken from the dummy indicated a low risk of any significant injuries.

The Impala’s optional front crash prevention system earns a superior rating. It avoided a crash in the 12 mph test, while its impact speed was reduced by an average of 10 mph in the 25 mph test. The system meets the NHTSA criteria for forward collision warning.

All the available headlights on the Impala earn a poor rating.

The Taurus is another vehicle that hadn’t been tested previously for small overlap protection. Maximum intrusion reached 5 inches at the lower door-hinge pillar. In contrast to the Impala’s test, the dummy’s movement in the Taurus was well-controlled. However, measures from the dummy indicate that injuries to the left lower leg would be possible in a crash of this severity. The Taurus earns good ratings in the other crashworthiness tests.

For front crash prevention, the Taurus has a basic rating. It has forward collision warning that meets NHTSA criteria but lacks automatic braking.

All the available headlights for the Taurus are rated poor.

Tesla issued a statement to the new results:

Tesla’s Model S received the highest rating in IIHS’s crash testing in every category except for one, the small overlap front crash test, where it received the second highest rating available. While IIHS and dozens of other private industry groups around the world have methods and motivations that suit their own subjective purposes, the most objective and accurate independent testing of vehicle safety is currently done by the U.S. Government, which found Model S and Model X to be the two cars with the lowest probability of injury of any cars that it has ever tested, making them the safest cars in history.

The average rate for insuring a Model S or Model X is about 5% lower than other premium vehicles, with some insurance providers charging 20% or 30% lower premiums than comparable cars. Indeed, Tesla guarantees that there will always be an insurance provider that will charge less for a Model S or X than any other car with a similar driver, price and vehicle category.

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