NHTSA — Engine Problems

10.0

really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
1 / 0
Average Mileage:
23,600 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.

2005 Mercury Grand Marquis engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 Mercury Grand Marquis:

Unsubscribe any time. We don't sell/share your email.

2005 Mercury Grand Marquis Owner Comments

problem #5

Nov 052024

Grand Marquis

  • miles

A D V E R T I S E M E N T S

On [XXX] I was driving this recently purchased Grand marquis. On [XXX] here in San Antonio around ten at night I hit the brakes and something under the hood compartment blew up and it cocked the car. I was trapped inside and when I finally was able to get my seatbelt released I had to break the window with my head. The previous week I reached out to ford and they told me they would address the issue and that they would call me back and that was to no avail. i reached out to ford and at first I was told I would be helped and then a man came on the phone yelling that my vehicle. I need help with resol this issue. My car is totaled and I-??m hurting and it-??s because of a car with recalls that are a fire haz and dangerous to be put on the road Thank you and God Bless. was not under any recalls The car had been parked for over ten years beca when the orig owner bought it it had issues with the cruise control and the brakes and the engine and the lights. I investigated about and hazards the car was demonstrating and upon further consideration my instinct told me this car was defected and was a big problem waiting to happen INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- San Antonio, TX, USA

problem #4

Mar 222024

Grand Marquis

  • miles
When i hit the brake pedal,4 times in past month car accelerated briefly then quit. no warning signs no one can tell me what's wrong i read there was a class action lawsuit file years ago for this problem.

- Newark, NJ, USA

problem #3

May 092019

Grand Marquis 8-cyl

  • Automatic transmission
  • 79,000 miles
The contact owns a 2005 Mercury Grand Marquis. While driving 45 mph, the contact attempted to brake, but the vehicle accelerated. The contact shifted the transmission into neutral and the vehicle stopped. The engine continued to rev for awhile and then the rpms slowed down to a normal level. The contact stated that the symptoms disappeared on their own and the vehicle operated without any failures since. The manufacturer stated that there was no recall for the failure. The failure mileage was 79,000.

- Greenville, NC, USA

problem #2

Jan 192018

Grand Marquis

  • 39,000 miles
The contact owns a 2005 Mercury Grand Marquis. While driving approximately 5 mph and then depressing the brake pedal to slow the vehicle down, the vehicle accelerated without warning. To avoid crashing into the preceding vehicle, the contact was able to veer to the right and continue driving. There was no warning indicator illuminated. The failure recurred three times. The vehicle was taken to porter Ford (600 ogletown rd, newark, de 19711) where it was diagnosed that the throttle body motor assembly was sticking and needed to be replaced. The vehicle was repaired. The manufacturer was not contacted. The approximate failure mileage was 39,000.

- New Ark, NJ, USA

problem #1

Jun 212017

Grand Marquis

  • miles
Vehicle at times with my foot on the brake pedal, just starts to accelerate for no reason when I stop a light or in traffic.

- Brooklyn, NY, USA

Not what you are looking for?