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Tesla Model S probed by U.S. after three fires in five weeks



 
 
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Old November 19th 13, 02:39 PM posted to alt.binaries.pictures.autos
rob
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Default Tesla Model S probed by U.S. after three fires in five weeks

November 19, 2013 - 5:58 am ET
WASHINGTON (Bloomberg) -- Tesla Motors Inc.'s Model S, the plug-in electric
sedan marketed by the company as "the safest car in America," is being
investigated by U.S. auto regulators in a possible precursor to a recall.

The U.S. National Highway Traffic Safety Administration announced the
preliminary evaluation today in a Web site posting, saying it would look
into the fire risks from the cars' undercarriages striking objects. The
probe involves all 13,108 Model S vehicles, it said.

The investigation, following three fires in five weeks after roadway
mishaps, may further lower Tesla shares. They have slid 37 percent since
reaching a closing peak of $193.37 on Sept. 30, the day before the first
fire.

Tesla CEO Elon Musk, who last week said "there's definitely not going to be
a recall," said in a blog post hours before the filing that the company
sought the probe to counter "false perceptions" about the car's safety.

Tesla will amend its warranty to cover damage due to fires and update its
air suspension to allow greater ground clearance at highway speeds, he said.

"While we think it is highly unlikely, if something is discovered that would
result in a material improvement in occupant fire safety, we will
immediately apply that change to new cars and offer it as a free retrofit to
all existing cars," Musk wrote.

Two of the three fires occurred in the U.S. when cars ran over metal
objects, which then punctured the cars' lithium-ion battery packs. A third,
which followed a high speed crash, was reported in Mexico on Oct. 18.

Drivers were uninjured in all the fires.

A preliminary investigation is the first step in NHTSA's process that could
lead to a recall if regulators determine that a manufacturer needs to
address a safety issue. The next stage of the process, if warranted, would
be an engineering analysis.

Thermal runaway

In announcing the probe, NHTSA said both U.S. incidents led to thermal
runaway, a phenemenon also found in the lithium-ion batteries on Boeing 787
Dreamliner airplanes that led to the plane's grounding earlier this year.

NHTSA said Oct. 24 it found no evidence the first fire resulted from defects
or violations of U.S. safety standards. It didn't send investigators to the
scene of that accident, in Washington state, because it occurred on the
initial day of a partial U.S. government shutdown.

Two months earlier, the Model S received the highest possible ratings in
NHTSA's crash tests, getting top five-star rating in each category.

NHTSA previously investigated fires in two other electric cars, the hybrid
electric General Motors Co.'s Chevrolet Volt and Fisker Automotive Inc.'s
Karma plug-in. The Karma was recalled and GM voluntarily reinforced the
battery packs on Volts, after one caught fire days after a NHTSA crash test.

'Larger issue'

California safety officials separately are investigating an industrial
accident at Tesla's plant that burned three workers last week.

"Given that the incidence of fires in the Model S is far lower than
combustion cars and that there have been no resulting injuries, this did not
at first seem like a good use of NHTSA's time compared to the hundreds of
gasoline fire deaths per year that warrant their attention," Musk wrote in
his blog post.

"However, there is a larger issue at stake: if a false perception about the
safety of electric cars is allowed to linger, it will delay the advent of
sustainable transport and increase the risk of global climate change, with
potentially disastrous consequences worldwide," Musk wrote.

Musk also cited a Nov. 8 blog in Automotive News, noting the low incidence
of fires in the Model S compared with gasoline-powered vehicles.





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