Worst Complaints About the Hummer H3

H3 owners are having the most trouble with the engine (34%), electrical (14%), and the cooling system (11%). We've listed the most common owner complaints below. The full list is available on CarComplaints.com.

  1. Leaking Valves 7 complaints at an average of 87,714 miles in the 2006 Hummer H3.
  2. Engine Runs Roughly 7 complaints at an average of 84,300 miles in the 2006 Hummer H3.
  3. Cylinder Head Failure 4 complaints at an average of 77,583 miles in the 2006 Hummer H3.

What's Wrong with the H3?

The H3 only has one generation which runs from 2006 to 2010. To date, it's earned a PainRank™ of 11.48 which ranks 4th.

Generation Model Years Reliability Complaints PainRank (?)
1st Gen H3 2006–2010
137 11.48

The most common H3 problems

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