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Investigators Find No Defect Trend With Tesla Motors' Model S

Federal safety investigators said Friday they have found no apparent defect trends in the Tesla Model S, an electric luxury car that has its share of fans and critics. The National Highway Traffic Safety Administration closed a four-month investigation into whether the car's batteries were at heightened risk for underbody strikes and subsequent fires. Even though no defect trend was found, Tesla Motors said in a written statement it would further protect the bottom of its cars with a reinforced underbody shield. The California-based automaker started adding the shields on March 6 and will retrofit older models free of charge. It will also increase the ground clearance of new cars. "This fix should eliminate the potential of a battery-pack fire under all but the most extreme circumstances," said Karl Brauer, a senior analyst at Kelley Blue Book. Although there are more than 194,000 car fires in the United States every year, NHTSA investigators began a preliminary investigation into potential trouble on Nov. 15, 2013 following two Model S fires, one in Tennessee and one in Washington. No one was injured or killed in either fire. Roadway debris punctured the battery pack near the front of the compartments in both cases, damaging the batteries' lithium ion cells that then began "thermal runaway" events. The opposite ends of the debris had dug into the pavement and jutted upward. Tesla called this a "piking effect." The company said it has conducted 152 vehicle level tests, and that the new shields prevented any damage or penetration of the new shields. The first is a rounded, hollow aluminum bar that's followed by a titanium plate. The third layer of protection is made of solid aluminum. (There's video of the new plates in action on the Tesla Motors website). "We have tried every worst-case debris impact we can think of, including hardened steel structures set in the ideal position for a piking event," Tesla Motors founder Elon Musk wrote on the company's blog," essentially equivalent to driving a car at highway speed, into a steel spear braced on the tarmac." Approximately 15,805 vehicles are eligible for the upgrades, which NHTSA says should reduce the frequency of underbody strikes and subsequent fire risks. But the agency did note that the closing of the investigation did not necessarily constitute a finding that a defect does not exist. "The agency reserves the right to take further action if warranted by new circumstances," it said.

Tesla, Porsche and Genesis top Consumer Reports owner satisfaction survey

Tesla swept Consumer Reports' latest Ownership Satisfaction Survey results, notching the top spot among brands evaluated. Its Model S also netted the No. 1 spot among the top 10 most-satisfying cars. Porsche and Genesis, Hyundai's new luxury spinoff, rounded out the top three brands. The bottom of the rankings was anchored by Acura, while Mercedes-Benz notched the least-satisfying car in the survey with the GLA, proving that the results weren't equally kind to all luxury brands. Jake Fisher, director of automotive testing for Consumer Reports, told USA Today those brands suffered by introducing cheaper vehicles. The scores, on a 100-point scale, reflect whether owners say the vehicles from model years 2015 through 2018 met their expectations and whether they would buy the same car again. They measure ratings in six categories: driving experience, comfort, value, styling, audio and climate systems (what, no cupholders?). Effectively, it gauges how much people liked the car they bought. Reliability is not considered. The Honda Ridgeline outscored competitors in the compact pickup segment by a wide margin, while the Ford F-350 was among the top 10-ranked vehicles in the survey, the first time in at least five years that a pickup made it into the top 10, Consumer Reports said. In the brand survey, Chrysler rose four places to No. 4 on strong customer satisfaction with the Pacifica minivan, while Hyundai tumbled 11 spots to No. 24 and Lexus fell eight places to 18th. Rounding out the top 10 most satisfying cars were the Porsche 911, Chevrolet Corvette, Lincoln Continental, Mazda MX-5 Miata, Toyota Prius, Tesla Model X SUV, Honda Odyssey minivan and Dodge Challenger. Not surprisingly, most of those cars, and indeed most of the high-ranking brands, are those with strong brand loyalty, fan-like followings and/or those that strike a strong emotional chord with buyers. The full brand rankings are below. Tesla (90) Porsche (85) Genesis (81) Chrysler (78) Audi (76) Mazda (76) Subaru (76) Toyota (76) Honda (75) Lincoln (75) Mini (73) Ram (73) Kia (72) Chevrolet (72) BMW (72) GMC (72) Ford (70) Lexus (70) Volvo (69) Dodge (68) Jeep (68) Mercedes-Benz (67) Volkswagen (67) Hyundai (67) Buick (66) Cadillac (64) Infiniti (60) Mitsubishi (58) Nissan (58) Acura (58) Related Video: Green Genesis Porsche Tesla Ownership satisfaction

Tesla attempting LA-NY Guinness record using Superchargers

Right now, two Tesla Model S EVs are crossing the US from Los Angeles to New York, hoping to be a big deal. Sure, a father-daughter team already claim they've made the cross-country drive, but this time, it's an official Tesla event and the company has its eyes on a Guinness World Record prize. The drivers left the Tesla design studio in Hawthorne, Los Angeles at midnight last night, and the plan is to use the company's just-completed Supercharger network to achieve the "lowest charge time for an electric vehicle traveling across the United States." We didn't know that was a category, either. Tesla now has over 70 Supercharger stations in the US and all of them are free-to-use for Model S drivers, which is why you can follow along on this record attempt via Twitter using the #DriveFree tag. As of early this morning, the teams made it to the Supercharger station in Kingman, AZ and posted this sunrise pic. We wish them safe travels – they will soon reach the snowy northern parts of the country since the current Supercharger route will take them through the upper Midwest on the way to the East Coast.