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What 157 owners told NHTSA about the 2016 Hyundai Sonata Plug-in

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 (157)Crash / fire / injury (7)Engine (90)Electrical system (46)Transmission & drivetrain (16)Fuel system (9)Brakes (7)Lights (7)Hybrid Propulsion System (5)Speed control (4)Visibility & wipers (4)Driver assistance (3)

1 of 157 complaints match · Speed control · crash/fire/injury only · clear filters

Dec 14, 2017Speed controlCrash

HTTPS://YOUTU.BE/Z4THV5A3LRK DYNAMIC CRUISE CONTROL THAT STOPS AND STARTS IN BUMPER-TO-BUMPER TRAFFIC IS WHAT SOLD ME ON THIS CAR. LAMENTABLY, I DID NOT KNOW HYUNDAI EXCLUDES AEB FROM HYBRID LTD ULTRAS. AS THE VIDEO SHOWS, FRANTIC BEEPING FROM THE FORWARD COLLISION WARNING SYSTEM WAS NOT ACCOMPANIED BY ANY BRAKING AT ALL. I SLAMMED ON THEM TOO LATE. I WAS IN DCC MODE WHEN THE WARNING SOUNDED. DCC CAN GRADUALLY SLOW FROM FREEWAY SPEED TO A STOP AND RESUME, BUT FCW APPARENTLY CANCELS DCC'S BRAKING! THIS MUST BE NO MORE THAN A DIFFERENCE IN SOFTWARE BETWEEN GAS-ONLY AND HYBRID LTD ULTRAS BECAUSE ALL SENSING AND CONTROL HARDWARE ARE IDENTICAL. HYUNDAI'S RESPONSE TO MY INQUIRIES ARE JUST REPETITIOUS CONFIRMATIONS OF WHAT I ALREADY DISCOVERED THE HARD AND EXPENSIVE WAY.

NHTSA ODI 11054632

Working with the data? Download all 157 complaints as CSV · fetched from NHTSA July 26, 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 2016 Hyundai Sonata Plug-in verdict →