2007 Hummer H3
Worst 2007 H3 engine Problems
Click on a problem below to read more.
- broken valve1
- cuts off while driving/no warning1
- engine misfire1
- large evaporative system leak1
- NHTSA: Engine15
- NHTSA: Engine And Engine Cooling7
- NHTSA: Vehicle Speed Control2
- NHTSA: Engine And Engine Cooling: Engine1
- NHTSA: Vehicle Speed Control: Accelerator Pedal1
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Compare Hummer H3 Model Years
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Check out our Hummer H3 overview to see the most problematic years, worst problems and most recently reported complaints with the H3.