Hummer H3 ReliabilityAll Years Ranked (2006–2009)
Side-by-side reliability scores, risk levels, and owner-cost projections for every Hummer H3 we've analyzed. Identify the best years to buy, the ones to avoid, and the problems that follow the H3 across generations.
Average Score
71/100
Best Year
2006 Hummer H3
Score 75
Weakest Year
2008 Hummer H3
Score 68
Every Hummer H3 Ranked
Sorted by reliability score. Each link opens the full year-specific report.
A formidable off-roader with a significant engine Achilles' heel that demands a thorough pre-purchase inspection.
Top risks: Engine Cylinder Head · HVAC System · Electrical System
A distinct and capable off-roader, but budget for potential major engine and electrical repairs.
Top risks: Engine (3.7L I5) · Electrical System · Front Suspension & Steering
A niche, capable off-roader that will test your patience and wallet if not thoroughly vetted and maintained.
Top risks: Engine (I5 3.7L Vortec) · HVAC System · Electrical System
A niche, highly capable off-roader that requires diligent maintenance and a tolerance for some common mechanical eccentricities.
Top risks: Engine Cylinder Head (3.7L I5) · Electrical System · Automatic Transmission (4L60E)
Problems That Follow the H3 Across Generations
Issues that appear in the top-3 risks across multiple model years — the cost of ownership you can actually predict.
Electrical System
Appears in 4 model years · 100% of generations
HVAC System
Appears in 2 model years · 50% of generations