1st Generation (2006—2010) H3 Problems

This generations ranks 4th out of 4 Hummer generations in reliability and is generally a good bet. Owners have the most complaints about the engine (34%), electrical (14%), and the cooling system (11%). We've listed some of the most recent complaints below, see them all 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 H3 Year is Most Reliable?

Generations are a good baseline for prediciting reliability, but there will almost always be year-to-year differences. We've calculated a reliability score for each model year within this generation, but we've based that score on how the model year compares to all Hummer model years.

Watch out for the 2006 model year which has the highest PainRank™ score in this generation.

Year Complaints Recalls TSBs PainRank (?)
2010 0 2 664 0.0
2009 5 2 637 7.25
2008 26 2 613 8.61
2007 37 2 559 11.76
2006 69 4 524 29.78

Watch out for these common problems

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