hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
110,000 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Mercury Grand Marquis brakes problems

brakes problem

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2004 Mercury Grand Marquis Owner Comments

problem #2

Jul 172015

Grand Marquis 8-cyl

  • Automatic transmission
  • 58,000 miles


The contact owns a 2004 Mercury Grand Marquis. While the vehicle was coming to a stop, the contact depressed the brake pedal and the speed and rpms increased without warning. The contact continued to depress the brake pedal; however, the vehicle failed to respond. The contact powered the vehicle off and noticed blue smoke emitting from the rear of the vehicle. The vehicle was taken to the dealer, but the failure was unable to be determined. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 58,000. MA 09/25 updated 12/05/2017

- St. Charles, MO, USA

problem #1

Sep 052014

Grand Marquis

  • 162,000 miles
The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at approximately 5 mph and depressing the brake pedal, the vehicle accelerated. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 162,000.

- Topeka, KS, USA

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