Ford Mustang vs Kia Soul
Compact car · 2015–2020 · 3,249 federal complaints

Ford Mustang
1,464 complaints · 4 engines
Most-complained engine: 4VPREMIUMFUEL · 2.3L I4
Full breakdown for Ford Mustang →
Kia Soul
1,785 complaints · 7 engines
Most-complained engine: GDIGAMMA · 1.6L I4
Full breakdown for Kia Soul →Side by side
Both cars scored as percentiles within Compact car, so the shapes are directly comparable. Built from EPA test data.
Ford MustangKia Soul
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.
Ford Mustang
762complaints
Engine 16%Electrical 13%
Kia Soul
412complaints
Engine 47%
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.