Car sunroofs are spontaneously exploding at alarming rate: ‘It sounded like a gunshot’

Key Points:

• Thousands of drivers in the US have reported spontaneous sunroof explosions across various car makes and models, with nearly 500 complaints filed in 2024 alone, approaching last year's total of 550 complaints.
• Incidents involve loud, gunshot-like noises followed by sudden glass shattering, often while driving, affecting over 200 models from 17 manufacturers including popular SUVs like Toyota RAV4, Hyundai Palisade, Kia Telluride, and Honda CR-V.
• Causes are believed to include repeated impacts from road debris and extreme temperature changes causing glass expansion, though some suggest design or manufacturing flaws; however, the National Highway Traffic Safety Administration (NHTSA) has found no conclusive defect evidence after past investigations.
• Despite the frequency of incidents, sunroof breakage has rarely led to recalls, and no serious injuries or crashes have been linked to these events; the industry is moving toward using laminated glass and stronger materials to mitigate the problem.
• Sunroofs and moonroofs have become increasingly common, now featured on over half of new vehicles in the US, raising exposure to such issues, while manufacturers like Hyundai and Honda attribute breakage to external debris and increased sunroof installations rather than inherent defects.