2009 Mercury Grand Marquis drivetrain NHTSA complaints: Power Train

NHTSA — Power Train Problems


fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
17,500 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.

2009 Mercury Grand Marquis drivetrain problems

drivetrain problem

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2009 Mercury Grand Marquis Owner Comments

problem #2

Jun 022012

Grand Marquis 8-cyl

  • 20,000 miles


My wife was driving around 25 mph and less than one mile from our house. When she applied the brakes to stop at a stop sign the engine revved up. I was riding with her and observed the engine rev to around 2,500 RPM before slowing down. I also observed that her right foot was on the brake and that nothing was touching the accelerator. The cruise control had not been turned on. This was at least the fourth time this year that the engine revved up when the brakes were applied. The dealer could not find the problem and the engine did not rev while the dealer was testing the car.

- Ridgeland, MS, USA

problem #1

Jan 252012

Grand Marquis

  • 15,000 miles
I applied the brakes at around 20 miles per hour on January 25 and the motor accelerated for one or two seconds. I was able to stop the car by pressing the brakes much harder than normal. On January 26 I applied the brakes at around 60 miles per hour and the motor again accelerated for one or two seconds. I continued to press the brakes, the motor slowed down and the car eventually slowed. It sounded like pressing the accelerator down hard to pass another car on a two lane road.

- Ridgeland, MS, USA

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