really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
80,785 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.

2000 Mercury Grand Marquis engine problems

engine problem

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2000 Mercury Grand Marquis Owner Comments

problem #9

Mar 022011

Grand Marquis

  • 98,900 miles


The contact owns a 2000 Mercury Grand Marquis. The contact stated that he was driving with the cruise control activated. As he approached a traffic stop and applied the brakes, the vehicle abnormally accelerated. The contact was accelerating toward traffic and in order to stop the vehicle, he veered off the highway and shut the engine off. He restarted the vehicle several minutes later as it resumed normal operation. The dealer was contacted and advised the contact to bring the vehicle in for inspection. The vehicle was not repaired. The failure mileage was approximately 98,900. The VIN was unavailable.

- Woodstock, GA, USA

problem #8

Jul 102010

Grand Marquis 6-cyl

  • Automatic transmission
  • 200,000 miles
The contact owns a 2000 Mercury Grand Marquis. The contact stated that while sitting in an intersection with the brakes depressed, the vehicle abnormally accelerated and lightly crashed into another vehicle. The air bags then deployed abnormally, several moments after the crash occurred. The contact was injured by the air bag and sustained lacerations to his left arm. A police report was filed. The vehicle was inspected by a dealer and they advised that the air bags should not have deployed without a forceful impact. The vehicle was repaired. The manufacturer was contacted and they offered no assistance. The failure mileage was approximately 200,000. Updated 03/29/11 updated 12/28/2011

- Norwalk, CA, USA

problem #7

Sep 102010

Grand Marquis 8-cyl

  • 167,000 miles
2000 Mercury Grand Marquis lunges forward (RPM increase @1000 and loud growl from engine compartment) when approaching a stop light and/or already stopped at a light. Everything returns to normal when I accelerate again, until the next light. This is an intermittent problem but very annoying. There have been no "incidents" from this since I now know to expect it, but I could certainly see an accident occurring as a result of this defect. I am reentering this as I think I marked the incorrect year make on my previous submission. It is actually a 2000.

- Winter Haven, FL, USA

problem #6

Sep 012006

Grand Marquis 8-cyl

  • Automatic transmission
  • 35,000 miles


The contact owns a 2000 Mercury Grand Marquis. While driving at various speeds between 5 and 10 mph the vehicle accelerated on its own and the brakes would not stop the vehicle. To stop the vehicle, the contact had to put the vehicle in neutral. The failure mileage was 35,000. There were no warning indicator lights illuminated. The current mileage was 37,000. The consumer stated that he previously put the car in reverse and it took off he kept braking but the vehicle wouldn't stop and damaged the front end of the car. Update 05/22/07

- Long Island City, NY, USA

problem #5

Jul 012006

Grand Marquis 8-cyl

  • Automatic transmission
  • 88,000 miles
: the contact stated the engine revved for no apparent reason and the check engine light illuminated previously. The vehicle has not be taken to the dealer. The vehicle had one accident about 2.5 years ago when the vehicle hit a deer. The dealer determined then that there were no engine problems after the accident, only damage to the body of the vehicle. The contact expressed that on two occasions while the vehicle was being parked, the engine has surpassed 5000 rpms.

- Merrillville, IN, USA

problem #4

Feb 042004

Grand Marquis

  • Automatic transmission
  • 108,161 miles
The vehicle accelerated while on the highway to 60 mph. The consumer put the vehicle into neutral to slow it down. After taking it to the garage the RPM(s) were completely open. The idle valve was found to be defective and replaced.

- Raleigh, NC, USA

problem #3

Oct 222004

Grand Marquis 8-cyl

  • Automatic transmission
  • 30,000 miles


While driving 70 mph vehicle stalled. Cruise control was engaged. After waiting for a little while the vehicle was restarted. Vehicle continued to run for a while before it stalled again. Vehicle was towed to a repair shop, and nothing could be found.

- Pine Beach, NJ, USA

problem #2

Dec 192000

Grand Marquis

  • miles
While making a left turn and then a right turn hit brakes, instead of vehicle slowing down or stopping it accelerated, causing consumer to hit a nearby building. Consumer sustained a minor injury.

- Fairless Hills, PA, USA

problem #1

Dec 012000

Grand Marquis

  • Automatic transmission
  • miles
While cruise control is activated it will turn off unexpectedly. In one case trottle opened and driver had to turn off vehicle, which almost caused a crash. The cruise control failed ten times.

- Hugo, OK, USA

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