Mercury Grand Marquis - Problems, Statistics, and Analysis

Mercury Grand Marquis owners have reported a total of 3,496 problems for their cars built in the 16 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the Mercury Grand Marquis. The 2005 Mercury Grand Marquis cars have the most problems reported (614 problems).

Table 1. Total number of problems by model year for Mercury Grand Marquis

Model Year	Number of Problems
2011 Grand Marquis	11
2010 Grand Marquis	33
2009 Grand Marquis	35
2008 Grand Marquis	101
2007 Grand Marquis	109
2006 Grand Marquis	185
2005 Grand Marquis	614
2004 Grand Marquis	413
2003 Grand Marquis	443
2002 Grand Marquis	102
2001 Grand Marquis	207
2000 Grand Marquis	215
1999 Grand Marquis	202
1998 Grand Marquis	168
1997 Grand Marquis	369
1996 Grand Marquis	280

🔍 Common problems of Mercury Grand Marquis

The following chart shows the 26 most common problems for Mercury Grand Marquis cars. The number one most common problem is related to the vehicle's exterior lighting (836 problems). The second most common problem is related to the vehicle's engine and engine cooling (422 problems).

Table 2. Common problems of Mercury Grand Marquis

Problem Category	Number of Problems
Exterior Lighting	836
Engine And Engine Cooling	422
Electrical System	301
Steering	292
Vehicle Speed Control	276
Service Brakes	186
Air Bag	179
Suspension	154
Seat Belt	133
Power Train	114

Structure	111
Visibility	98
Gasoline Fuel System	89
Tire	85
Equipment	67
Other Fuel System	45
Wheel	29
Unknown Or Other	26
Latches/locks/linkage	15
Seats	13
Interior Lighting	10
Electronic Stability Control	6
Parking Brake	5
Forward Collision Avoidance	2
	1
Diesel Fuel System	1

📉 Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Mercury Grand Marquis of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across Grand Marquis model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.

PPMY = P / S / Y * 1000,

where P = total problems reported during the life of a Mercury Grand Marquis model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).

The results are shown in Table 3.

Table 3. Use PPMY Index to Compare Reliability Across Grand Marquis Model Years

Grand Marquis Model Year	Problems	Sales [1]	Vehicle Age	PPMY Index
2011	11	10,053	15	0.07
2010	33	27,959	16	0.07
2009	35	21,107	17	0.10
2008	101	43,217	18	0.13
2007	109	39,145	19	0.15
2006	185	45,744	20	0.20
2005	614	66,747	21	0.44
2004	413	88,373	22	0.21
2003	443	105,711	23	0.18
2002	102	62,655	24	0.07
2001	207	105,142	25	0.08
2000	215	135,625	26	0.06

📊 Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Mercury Grand Marquis is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.

Table 4. Number of problems in vehicle's; first service year

Model Year	Problems Reported
2010 Grand Marquis	2
2009 Grand Marquis	5
2008 Grand Marquis	9
2007 Grand Marquis	12
2006 Grand Marquis	20
2005 Grand Marquis	23
2004 Grand Marquis	15
2003 Grand Marquis	38
2002 Grand Marquis	21
2001 Grand Marquis	40
2000 Grand Marquis	33
1999 Grand Marquis	26
1998 Grand Marquis	28
1997 Grand Marquis	13
1996 Grand Marquis	26

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