FaultScore

Lexus GS400 vs Hyundai Ioniq Hybrid

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 Lexus GS400 Hyundai Ioniq Hybrid
Complaints on file 80 199
Model years covered 1994–2000 2017–2022
Worst model year 2017
Best model year 2021
Crashes reported 33 28
Fires reported 0 8
Injuries reported 20 13
Deaths reported 0 0
Most complained-about part Acceleration & Cruise Control Electrical System
Share of complaints involving harm 66.3% 24.6%

Lexus GS400 by year

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

What breaks

Acceleration & Cruise Control 14 17.5%
Brakes 12 15.0%
Airbags 10 12.5%
Suspension 9 11.3%
Electrical System 8 10.0%
Seat Belts 6 7.5%
Engine & Cooling 5 6.3%
Tires 4 5.0%

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 26 13.1%
Driver Assist & Collision Avoidance 24 12.1%
Other & Unspecified 22 11.1%
Engine & Cooling 19 9.5%
Fuel & Propulsion 16 8.0%
Acceleration & Cruise Control 15 7.5%
Transmission & Drivetrain 13 6.5%