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fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
17,000 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.

2006 Mercury Grand Marquis drivetrain problems

drivetrain problem

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2006 Mercury Grand Marquis Owner Comments

problem #1

Feb 062010

Grand Marquis

  • 17,000 miles


I have had 37 instances of engine acceleration when I brake with my 2006 Mercury Grand Marquis. The first instance was in may, 2007. I depress the brake pedal, and the engine first slows to approx 850 - 900 RPM then begins running up to over 2500 RPM. The dealer says I'm hitting the brake and the gas at the same time. I've tried doing that and it is extremely difficult. I suspect a computer malfunction where the braking is triggering a computer-initiated engine acceleration.

- Nipomo, CA, USA

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