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What 75 owners told NHTSA about the 2021 Hyundai Tucson Fuel Cell

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (75)Crash / fire / injury (8)Engine (36)Brakes (12)Electrical system (11)Fuel system (8)Transmission & drivetrain (7)Driver assistance (6)Airbags (2)Body & structure (2)Engine & cooling (2)Lane Departure (2)

2 of 75 complaints match · Body & structure · clear filters

Aug 17, 2025Body & structure

While driving on the freeway my sunroof suddenly imploded sending glass everywhere. No warning whatsoever it was like a bomb went off out of nowhere. Nothing hit the car and temps were not high and it just imploded This is a serious matter and extremely dangerous. The pain and ringing in my ears is awful, glass went all over this is serious issue that can cause death and injury

NHTSA ODI 11681195

Feb 25, 2024Body & structure1 injury

Panoramic sunroof spontaneously exploded when driving on highway. No warning. Sounded like a gunshot. Had to pull over on the highway and clean off as much glass as I could so it did not cause injury or damage to other motorists. Looks like many other Tucson owners are experiencing similar issues. Has not been inspected yet as dealerships and insurance are closed today.

NHTSA ODI 11573848

Working with the data? Download all 75 complaints as CSV · fetched from NHTSA July 25, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 Hyundai Tucson Fuel Cell verdict →