2003 Mercury Grand Marquis speed control problems
The 2003 Mercury Grand Marquis has 27 speed control complaints filed with NHTSA — 6% of the year's total, and up sharply from the prior model year.
27
Speed Control complaints
6%
Share of year
13
Crash-involved
0
Related recalls
Speed Control complaints by year
What owners report
“THE ENGINE REVVED IN FULL THROTTLE WHEN THE GEAR SHIFTER WAS SHIFTED INTO DRIVE FROM PARK; RESULTING IN A REAR END COLLISION. THIS OCCURRED WHILE IN STOP AND GO TRAFFIC IN THE CAR WASH LINE. THE REPAIR SHOP FAILED TO DETERMINED WHAT CAUSED THE FAILURE, BUT THE CONSUMER FEELS DUE THROUGH THEIR OWN…”
Common questions
How many speed control complaints does the 2003 Mercury Grand Marquis have?
NHTSA has 27 complaints about the 2003 Mercury Grand Marquis speed control — 6% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.