Chart based on 310 Pontiac Grand Prix and 619 Porsche 911 repairs.
Chart based on 262 Pontiac Grand Prix and 501 Porsche 911 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Don't infer Pontiac Grand Prix or Porsche 911 problem frequency from what you see on this page. Many lucky owners have had no repairs, and their cars are not shown.
Pontiac Grand Prix and Porsche 911 Problems and Repair Histories