2006 Mercury Grand Marquis Engine Problems
- Complaints
- 8about this part
- Share
- 6%of 143 total for the year
- Median mileage
- 99,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the engine of the 2006 Mercury Grand Marquis, 6% of the 143 complaints for this model year. Where a mileage was given, the median is 99,000 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“At 110000 miles my engine started to run very ruff,and would die out at an idle,took it to the dealer and was told it has a cracked plastick intake manifold.when I expressed my concern about putting another plastic part back on,I was told they have redesigned the part because of all the problems they have had with the 4.6 ltr engine and the plastic intakes!”
NHTSA complaint #10779372, filed 2015-10, 110,000 miles“Upon readying for stop the vehicle surged forward. I had to put in neutral and wait until the surge discontinued. This has been going on for several months. It has become a incident that happens more often. It is very scary. A had jump happens when I put it back in gear.”
NHTSA complaint #10637999, filed 2014-09, 102,000 miles“My 2006 Mercury Grand Marquis ls premium car has an unresolved stalling issue. The problem is exacerbated when the car's engine warms up, especially during warmer weather. It tends to stall out at extended stoplights or if the vehicle needs to be stopped within a short distance. My car first began stalling after I had it washed in gasoline station's automatic car wash. Shortly after it was washed, the engine began running extremely rough and then finally stalled out with the 'engine' light on yellow light on the dashboard. …”
NHTSA complaint #10787565, filed 2015-11, 63,000 miles“On several occasions since I've owned this vehicle (I am original owner) when I step on the brakes hard the engine accelerates. Recently it has gotten worse and I know I'm not touching the accelerator. Today it was so bad the I was standing on the brakes with both feet and burning rubber. I shifted to park and the engine went onto max acceleration. I shut of the engine and restated and found it was still at max acceleration. I shut it off again and waited 30 seconds. When I then restarted it ran normally. …”
NHTSA complaint #10552931, filed 2013-11, 55,000 miles“My 2006 Grand Marquis original plastic intake manifold developed a crack at the drivers side rear intake bolt area causing it to leak antifreeze. This caused me to have to spend $240.00 to buy a new dorman replacement and install it. Ford continues to use these cheap plastic manifolds despite losing a class action lawsuit against them for this problem. There will be more of these plastic manifold failing in the near future to be sure. This problem should be addressed by a new class action lawsuit due to fords continued incompetence as a manufacturer. …”
NHTSA complaint #10473802, filed 2012-09, 219,000 milesRelated service bulletins
- 10166447Sep 18, 2019This SKU is a Radiator Fan. The customer communication requested return of unsold inventory to inspect the electrical connections. An electrical connection issue may lead to the…
- 10109070Sep 21, 2016The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to…
- 10045340Jul 10, 2012Ford/lincoln/mercury: if battery was disconnected or dead, vehicles/trucks may experience hard starts and engine idle rpm fluctuation and exhibit diagnostic trouble codes (dtcs)…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 1 | 4% |
| 2009 | 2 | 8% |
| 2008 | 4 | 5% |
| 2007 | 4 | 4% |
| 2006 | 8 | 6% |
| 2005 | 5 | 1% |
| 2004 | 4 | 1% |
| 2003 | 5 | 1% |
| 2002 | 2 | 3% |
| 2001 | 9 | 6% |
| 2000 | 8 | 5% |
| 1999 | 7 | 4% |
| 1998 | 3 | 2% |
| 1997 | 2 | 1% |
| 1996 | 1 | 0% |
| 1994 | 1 | 1% |
| 1990 | 1 | 2% |
| 1985 | 1 | 5% |
Other parts of the 2006 Mercury Grand Marquis
37 complaintsVehicle speed control
37 complaintsSeat belts
22 complaintsFuel system
13 complaintsSteering
13 complaintsBrakes
12 complaintsElectrical system
8 complaintsBody and structure
8 complaintsExterior lighting
6 complaintsOther or unknown
5 complaintsTransmission and drivetrain
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaints
← All problems reported for the 2006 Mercury Grand Marquis
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology