2007 Hummer H3 engine problems
44 owner complaints filed with NHTSA name the engine on the 2007 Hummer H3 — 19% of all complaints for this model year.
What owners report
“The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to…”
filed Jun 21, 2021
“On 3/13/2020 my wife was driving our 2007 hummer h3 when the engine compartment and dash area caught on fire. The blower motor connector module had been replaced recently as part of a safety recall. The vehicle was in motion and she had just made a left turn. Although the part had been replaced, I…”
filed Feb 2, 2021
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
04-06-04-051J · Service Bulletin/Repair Instructions · issued Sep 27, 2024
Engine problems in other H3 years
| Year | Reports | Share |
|---|---|---|
| 2009 H3 | 9 | 13% |
| 2008 H3 | 18 | 16% |
| 2006 H3 | 52 | 14% |
Other reported problem areas on the 2007 Hummer H3
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.