The 4th generation Grand Marquis started in 2003 and runs to 2011.
Its PainRank™ score of 4.21 ranks 19th out of 28 eligible generations in reliability. The score is based on relative complaint analysis of the 140 owners complaints on CarComplaints.com. A majority of the complaints are about lights problems..
Sometimes it helps just to tally up the complaints and see where the biggest stacks are. Use this information to learn about troublespots or to run for the hills.
Grouping all models by their year can reveal some baddies.
Running tally of owner grievances filed to CarComplaints.com.
Overall reliability rank out of 28 eligible generations.