Chart based on 362 Porsche Cayman and 277 Hummer H3 repairs.
Chart based on 274 Porsche Cayman and 200 Hummer H3 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Don't infer Porsche Cayman or Hummer H3 problem frequency from what you see on this page. Many lucky owners have had no repairs, and their cars are not shown.
Porsche Cayman and Hummer H3 Problems and Repair Histories