Home · 2020 Hyundai Ioniq Plug-in Hybrid · Complaints

What 4 owners told NHTSA about the 2020 Hyundai Ioniq Plug-in Hybrid

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 (4)Crash / fire / injury (2)Brakes (2)Driver assistance (1)Transmission & drivetrain (1)Visibility & wipers (1)

1 of 4 complaints match · Transmission & drivetrain · clear filters

Jan 8, 2026Transmission & drivetrainCrash

When the engine is turned off, and the car is not in park, it rolls. When the engine is turned off the car should automatically switch to P to prevent it from rolling. Our car was left in R with the engine off. And instead of switching to P automatically, it just rolled away and hit the neighbors garage.

NHTSA ODI 11709810

Working with the data? Download all 4 complaints as CSV · fetched from NHTSA July 15, 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 2020 Hyundai Ioniq Plug-in Hybrid verdict →