<Tr> <Td> Rollover </Td> <Td> / 5.7% </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <P> However, in July 2017, the Insurance Institute for Highway Safety (IIHS) found that during front crash tests, the Model S safety belts let the driver's torso move too far forward, resulting in the head striking the steering wheel hard through the airbag . This problem was already pointed out in one of the IIHS's earliers tests, to which Tesla responded they would improve their safety belt design, which, according to the IIHS's latest tests, has not been done . The IIHS also gave the Model S the worst possible rating for its headlights . The report caused Tesla to lose 6.4% of its stock value . </P> <P> The first widely reported Model S fire occurred several minutes after the vehicle hit metal debris on the Washington State Route 167 highway in Kent, Washington on October 1, 2013 . The driver "was able to exit the highway as instructed by the onboard alert system, bring the car to a stop and depart the vehicle without injury". He then contacted authorities and, while awaiting their arrival, smoke began coming out the front of the vehicle . The driver stated that he hit something while exiting the HOV lane . Tesla stated that the fire was caused by the "direct impact of a large metallic object to one of the 16 battery modules", and that by design, the modules were separated by firewalls, limiting the fire to "a small section in the front of the vehicle". </P> <P> The module was evidently punctured by a "curved section" that fell off a truck and was recovered near the accident . Tesla stated that the debris punched a 3 - inch (76 mm) diameter hole through the . 25 - inch (6.4 mm) armor plate under the vehicle, applying force of some 25 tons . Built - in vents directed the flames away from the vehicle so that the fire did not enter the passenger compartment . According to Tesla, the firefighters followed standard procedure; using large amounts of water to extinguish the fire was correct, however, puncturing the metal firewall to gain access to the fire also allowed the flames to spread to the front trunk . Tesla also stated that because the battery pack contains "only about 10% of the energy contained in a gasoline tank", the effective combustion potential of a single module is only about 1% that of a conventional vehicle . </P>

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