2005 Mercury Grand Marquis speed control problems
The 2005 Mercury Grand Marquis has 39 speed control complaints filed with NHTSA — 6% of the year's total, and up sharply from the prior model year.
39
Speed Control complaints
6%
Share of year
13
Crash-involved
0
Related recalls
Speed Control complaints by year
What owners report
“CAR WAS SLOWING FOR RED LIGHT, STEPPED ON BRAKE, ENGINE OVERSPED, VEHICLE WAS UNCONTROLLABLE, COLLIDED WITH PICK UP TRUCK AHEAD, PICK UP WAS PUSHED INTO A COMPACT CAR AHEAD. AIR BAGS DID NOT DEPLOY. CLOUDS OF SMOKE BEHIND MY CAR AND TIRE MARKS ON ROADWAY CONFIRMED BRAKE PEDAL, NOT ACCELERATOR, WAS…”
Common questions
How many speed control complaints does the 2005 Mercury Grand Marquis have?
NHTSA has 39 complaints about the 2005 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.