Hyundai Sonata vs Nissan Altima
Midsize sedan · 2015–2020 · 3,971 federal complaints
Hyundai Sonata
1,987 complaints · 4 engines
Most-complained engine: GDITHETA-II · 2.4L I4
Full breakdown for Hyundai Sonata →
Nissan Altima
1,984 complaints · 1 engines
Most-complained engine: QR25DE · 2.5L I4
Full breakdown for Nissan Altima →Side by side
Both cars scored as percentiles within Midsize sedan, so the shapes are directly comparable. Built from EPA test data.
Hyundai SonataNissan Altima
What each one's complaints are about
Showing each car's highest-volume engine. Share of component mentions — not a failure rate, and not a ranking between the two.
Hyundai Sonata
1,106complaints
Engine 40%Steering 11%
Nissan Altima
1,952complaints
Transmission & drivetrain 20%
One car having more complaints than the other mostly reflects how many were sold, not how often they break. Compare each car's own mix of problems — not the totals.