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2003 Mercury Grand Marquis
Worst 2003 Grand Marquis engine Problems
Click on a problem below to read more.
- engine blown1
- engine smokes on startup1
- spitting and sputtering1
- unintended engine acceleration1
- NHTSA: Vehicle Speed Control17
- NHTSA: Engine And Engine Cooling: Engine7
- NHTSA: Vehicle Speed Control: Accelerator Pedal6
- NHTSA: Vehicle Speed Control: Cruise Control3
- NHTSA: Engine And Engine Cooling2
- NHTSA: Engine1
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Compare Mercury Grand Marquis Model Years
Curious how the 2003 Grand Marquis compares to other years?
Check out our Mercury Grand Marquis overview to see the most problematic years, worst problems and most recently reported complaints with the Grand Marquis.