FaultScore

Hyundai Ioniq 9 problems

Owners have filed 61 complaints about the Hyundai Ioniq 9 with NHTSA across model years 2026 to 2026. More of them are about the electrical system than anything else.

Every Hyundai Ioniq 9 year, graded

The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.

26
Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded
Year Grade Complaints Crashes Fires Median miles Most reported
2026 61 0 0 Electrical System

What breaks on a Hyundai Ioniq 9

Across every model year on file. Follow a row for that part's complaints and the year it was worst.

Electrical System 20 32.8%

Worst in 2026

Driver Assist & Collision Avoidance 11 18.0%

Worst in 2026

Fuel & Propulsion 9 14.8%

Worst in 2026

Transmission & Drivetrain 6 9.8%

Worst in 2026

Acceleration & Cruise Control 4 6.6%

Worst in 2026

Other & Unspecified 3 4.9%

Worst in 2026

Engine & Cooling 2 3.3%

Worst in 2026

Seats 2 3.3%

Worst in 2026

Brakes 1 1.6%

Worst in 2026

Body & Structure 1 1.6%

Worst in 2026

Wheels 1 1.6%

Worst in 2026

Seat Belts 1 1.6%

Worst in 2026

Complaints filed over time

Every complaint about every Hyundai Ioniq 9, by the month it reached NHTSA.

Jun 2025 peak 13 Aug 2026

Compare the Hyundai Ioniq 9

Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.