Hyundai Ioniq Hybrid vs Mercury Marquis

Both cars' complete complaint records, side by side.

Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.

Measure Hyundai Ioniq Hybrid Mercury Marquis
Complaints on file 204 501
Model years covered 2017–2022 1977–2004
Worst model year 2017 1997
Best model year 2021 2004
Crashes reported 28 48
Fires reported 10 37
Injuries reported 15 43
Deaths reported 0 0
Most complained-about part Electrical System Engine & Cooling
Share of complaints involving harm 26% 25.5%

Hyundai Ioniq Hybrid by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks

Brakes 29 14.2%
Driver Assist & Collision Avoidance 24 11.8%
Other & Unspecified 22 10.8%
Engine & Cooling 19 9.3%
Fuel & Propulsion 16 7.8%
Acceleration & Cruise Control 15 7.4%
Transmission & Drivetrain 14 6.9%

Mercury Marquis by year

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks