2006 Hummer H3 engine problems
The 2006 Hummer H3 has 87 engine complaints filed with NHTSA — 19% of the year's total, and the first year with meaningful reports in this category.
87
Engine complaints
19%
Share of year
0
Crash-involved
0
Related recalls
Engine complaints by year
What owners report
“TL* THE CONTACT OWNS A 2006 HUMMER H3. THE CONTACT WAS TRAVELING 50 MPH WHEN THE SMELL OF COOLANT EMITTED INSIDE OF THE VEHICLE AND WHITE SMOKE WAS VISIBLE FROM UNDER THE HOOD. THE CHECK ENGINE WARNING LIGHT ILLUMINATED INTERMITTENTLY WITH THE FAILURE. THE CONTACT CONFIRMED THAT THE ENGINE WAS OVER…”
Common questions
How many engine complaints does the 2006 Hummer H3 have?
NHTSA has 87 complaints about the 2006 Hummer H3 engine — 19% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.