Surge of Drivers Say Sunroofs Shattering: ReportKiaImagine you're cruising down the highway, when suddenly you hear something that sounds like a gunshot. You haven't been hit, your engine hasn't exploded, and your tires are all still intact. Instead, the giant piece of glass sitting above your head has shattered into a million pieces out of nowhere. That's what hundreds of drivers across America this year have claimed happened to their sunroofs, and complaints are piling up with unexpected briskness, a new report says.Nearly 500 broken-sunroof complaints have reached the National Highway Traffic Safety Administration so far in 2026, according to a Wall Street Journal analysis. That's already approaching the 550 filed during all of 2025. Reports over the past three years involve more than 200 models from 17 manufacturers.One driver, Amber Nguyen, was traveling down a Louisiana highway in her 2025 Lexus RX 350h when the glass suddenly shattered. "I'm not even joking, it sounded like a gunshot," she told the Journal. Her sunshade was closed, keeping the broken glass out of the cabin.AdvertisementAdvertisementThe wildest part of all this: there's no clear answer about why this is happening. NHTSA spent seven years investigating similar complaints after opening a probe into the Kia Sorento in 2013. Regulators eventually examined roughly 10 million vehicles and 4000 reported sunroof fractures, but found insufficient evidence of a safety-related defect.Recent lawsuits haven't done much to strengthen the defect argument. A Kia class action alleging exploding sunroofs was dismissed this May after nearly 12 years of litigation. A similar Mercedes-Benz case was dismissed in July after plaintiffs failed to provide enough evidence that their shattered roofs suffered from manufacturing defects. Mercedes claimed its fracture rate was just 0.0086 percent.MercedesNissan, meanwhile, is still fighting a separate class action involving owners in four states, although it says fewer than 0.2 percent of its panoramic sunroofs have broken from any cause.The best-supported explanation behind the failures is considerably less mysterious than spontaneous explosion. NHTSA's previous investigation found that tiny rocks can create nearly invisible damage in tempered glass, which may fail later as stresses build. Glass manufacturers also point to scratches, edge damage, temperature changes and, much more rarely, microscopic nickel-sulfide contaminants created during manufacturing. In other words, the bang might seem completely spontaneous, if whatever doomed the roof happened miles or months beforehand.AdvertisementAdvertisementAs the various parties involve search for an answer, there is one other factor to consider: there are simply far more sunroofs out there. More than half of vehicles produced for America now have one, according to Omdia data cited by the Journal.You Might Also LikeIf You Can Only Own One Car, Make It One of TheseThese Are the Most Popular Cars by State
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