2006 Hummer H3 Engine Problems
Owners have filed 52 complaints with NHTSA about engine problems on the 2006 Hummer H3, 14% of all complaints for this model year. Half of the reports with a mileage happened before 86,884 miles. The words owners use most often: “cylinder head” (12% of reports).
- 52engine complaints
- 86,884median miles at failure
- 0mention a crash
- 0mention an injury
- 0related recalls
- $5,800typical repair cost reported by owners
- 65%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Cylinder head: mentioned in 6 of 52 complaints (12%)
How much does it cost to fix?
Owners who wrote down what they paid or were quoted put the typical engine repair on the 2006 Hummer H3 at $5,800, and half of them between $4,300 and $8,050.
Based on 6 NHTSA complaints about this problem alone that state a repair bill or quote (2013–2021), converted to 2026 dollars with the U.S. consumer price index. These are owners' own figures, not a quote: they include dealer quotes, and owners who file complaints often faced larger repairs, so they can run higher than typical shop prices. Prices vary by shop, region and warranty coverage. How we calculate this.
At what mileage do engine problems happen?
Based on 44 complaints that reported the odometer reading.
How serious are the reports?
Of 52 complaints, 1 a fire.
Hummer H3 engine complaints by model year
When owners reported it
Related recalls (0)
No safety recall lists engine for the 2006 Hummer H3. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The blower resistor and harness needs replaced it looks like it caught fire or default
On the electrical, I refer to my air conditioning and heater. When I have my air selection to coldest and I drop 1 click for it to be less cool, my heater turns on and at times it smells like something burning. I have to turn it off . On the engine, after I hit 90,000 miles, I have to fill up my…
Was heading home from work and the 2006 Hummer H3 shut off while traveling in the middle of traffic was able to cruise in Nuetral until I could stop to start car again started car and yet again I receive a cylinder misfire code which has been repaired on multiple attempts still no success. I am…
Frequently asked questions
Do all 2006 Hummer H3s have engine problems?
No. NHTSA has 52 owner complaints about engine for the 2006 Hummer H3 (14% of the 361 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2006 Hummer H3 engine?
No recall currently lists engine for this vehicle.
At what mileage do engine problems start?
The median reported mileage is 86,884 miles: half of the reports with a mileage came before that.
How much does it cost to fix engine problems on the 2006 Hummer H3?
Owners report a typical cost of $5,800 (half paid between $4,300 and $8,050), from 6 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about engine problems on the 2006 Hummer H3?
The most frequent phrase is “cylinder head”, in 6 of 52 complaints.
Other 2006 Hummer H3 problems
See all 2006 Hummer H3 problems or engine problems across all H3 years.