Hummer H3 vs Mercury Mariner
Owner complaints, worst years and recall history side by side, from official NHTSA data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
Hummer H3
- Total complaints
- 780
- Avg per model year
- 157
- Recall campaigns (all years)
- 4
- Most complained year
- 2006 (361)
Top problems: Electrical System, Engine, Structure
Mercury Mariner
- Total complaints
- 1,295
- Avg per model year
- 185
- Recall campaigns (all years)
- 6
- Most complained year
- 2008 (461)
Top problems: Steering, Power Train, Vehicle Speed Control
Method. Complaints are unique NHTSA reports per model year. A model that sold more units will naturally accumulate more complaints — compare the shape across years, not just the raw totals, and read the year pages for what actually fails.