Mercury Grand Marquis 1998–2002
3rd generation · Ford Panther (revised)
NHTSA data through 13 August 2026894 complaints, 419 with mileageMethod
- Reports with mileage
- 419
- Median of reported failures
- 78,000 mi
- Most-reported system
- Engine and its cooling system (11.3%)
- Recalls
- 0
Before-you-buy checklist ↓Check this VIN — NHTSA ↗
On this generation, failures are spread across the mileage range, with the middle half between 41,712 and 118,000 miles.
Figure 1 · Mercury Grand Marquis 1998–2002 · 419 reports with mileage
Mileage at failure
Complaints per 10,000-mile bin, 0 to 200,000 miles, equal bins on a linear scale. Tallest bar = 36 complaints.
- Rest of the range
- Median
- 200,000+ — 19 complaints (4.5%), plotted separately
- 10%
- 18,600
- 25%
- 41,712
- Median
- 78,000
- 75%
- 118,000
- 90%
- 158,200
Show the numbers
| Mileage | Complaints | Share |
|---|---|---|
| 0–10,000 | 23 | 5.5% |
| 10,000–20,000 | 20 | 4.8% |
| 20,000–30,000 | 30 | 7.2% |
| 30,000–40,000 | 22 | 5.3% |
| 40,000–50,000 | 29 | 6.9% |
| 50,000–60,000 | 35 | 8.4% |
| 60,000–70,000 | 21 | 5.0% |
| 70,000–80,000 | 36 | 8.6% |
| 80,000–90,000 | 31 | 7.4% |
| 90,000–100,000 | 26 | 6.2% |
| 100,000–110,000 | 27 | 6.4% |
| 110,000–120,000 | 18 | 4.3% |
| 120,000–130,000 | 16 | 3.8% |
| 130,000–140,000 | 18 | 4.3% |
| 140,000–150,000 | 13 | 3.1% |
| 150,000–160,000 | 13 | 3.1% |
| 160,000–170,000 | 15 | 3.6% |
| 170,000–180,000 | 1 | 0.2% |
| 180,000–190,000 | 4 | 1.0% |
| 190,000–200,000 | 2 | 0.5% |
| 200,000+ | 19 | 4.5% |
Source: NHTSA Office of Defects Investigation, public domain. Complaint counts reflect what owners reported and are not a measure of failure rate per vehicle sold.
What this can and cannot tell you: these are complaints owners chose to file, not a failure rate. Popular models accumulate more of them simply by being common. How this is built.
Owners filed 894 complaints with NHTSA about the 1998–2002 Mercury Grand Marquis, and 419 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
Failures are spread across the mileage range, with the middle half between 41,712 and 118,000 miles. The median is 78,000 miles.
The most-reported areas are the engine and its cooling system (11.3% of complaints, typically around 88,000 miles), the steering (8.8% of complaints, typically around 88,000 miles), throttle and speed control (8.7% of complaints, typically around 60,000 miles).
If you arrived asking “is it reliable?” — this page answers the version of that question the data can support: which problems owners reported, and at what mileage.
How many miles does a 1998–2002 Mercury Grand Marquis last?
Half of the failure reports on the 1998–2002 Mercury Grand Marquis were filed by 78,000 miles and 90% by 158,000 miles — figures drawn from 419 NHTSA complaints that record an odometer reading, so they time reported failures, not the cars whose owners never filed one.
19 reports (4.5%) came in past 200,000 miles — each one proof a Grand Marquis reached that mileage, not that it died there.
Before you buy a 1998–2002 Grand Marquis: the 3-minute check
Generated from 419 mileage-tagged complaints, 2 documented problem areas. Print this page — the checklist survives print.
- Check intake manifold (composite) on 1998–2001 cars. Same 4.6L 2-valve composite intake manifold coolant-crossover cracking as the previous generation; the 2005 class-action settlement covered 1996-2001 model years, and the redesigned manifold with an aluminum crossover…
- Check rear air suspension on 1998–2002 (so–equipped) cars. Air spring and compressor leaks on air-suspension-equipped cars produce rear-end sag and compressor burnout.
- End with a pre-purchase inspection of this car. Aggregate data describes the population; the example in front of you has its own history.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 42,000 and 118,000 miles, with a median of 78,000. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the engine and its cooling system and the steering are where this generation's reports concentrate, so those are the areas worth a specific look. The engine and its cooling system in particular shows a median failure mileage of 88,000, which gives a concrete number to compare against the odometer of any car you are considering.
None of this is a substitute for a pre-purchase inspection on the individual car. Aggregate patterns describe a population; the example in front of you has its own history.
What fails, and when
Figure 2 · Mercury Grand Marquis 1998–2002
When each system fails
Bar spans the middle half of reports; the notch inside each bar is the median. Miles at failure on a proportional scale — equal distances are equal ratios, not equal miles.
- Hydraulic brake circuit54 reports22,0008,000–50,000Hydraulic brake circuit: 54 reports, median 22,000 miles, middle half 8,000 to 50,000 miles.
- Suspension68 reports50,00031,000–105,000Suspension: 68 reports, median 50,000 miles, middle half 31,000 to 105,000 miles.
- Throttle and speed control78 reports60,00040,000–108,000Throttle and speed control: 78 reports, median 60,000 miles, middle half 40,000 to 108,000 miles.
- Electrical system72 reports75,00026,000–124,000Electrical system: 72 reports, median 75,000 miles, middle half 26,000 to 124,000 miles.
- Engine and its cooling system101 reports88,00057,000–113,000Engine and its cooling system: 101 reports, median 88,000 miles, middle half 57,000 to 113,000 miles.
- Steering79 reports88,00054,000–140,000Steering: 79 reports, median 88,000 miles, middle half 54,000 to 140,000 miles.
- Exterior lighting74 reports118,00072,000–140,000Exterior lighting: 74 reports, median 118,000 miles, middle half 72,000 to 140,000 miles.
- Your odometer — appears after you enter it in “Where your car sits”
Ordered by median mileage, earliest first. The first 12,000 miles are shaded: that is the boundary this site uses between a manufacturing defect and ordinary wear, not a property of the world.
Source: NHTSA Office of Defects Investigation, public domain.
| System | Complaints | Share | Median | 25–75% |
|---|---|---|---|---|
| Engine and its cooling system | 101 | 11.3% | 88,000 | 57,000–113,000 |
| Steering | 79 | 8.8% | 88,000 | 54,000–140,000 |
| Throttle and speed control | 78 | 8.7% | 60,000 | 40,000–108,000 |
| Exterior lighting | 74 | 8.3% | 118,000 | 72,000–140,000 |
| Electrical system | 72 | 8.1% | 75,000 | 26,000–124,000 |
| Suspension | 68 | 7.6% | 50,000 | 31,000–105,000 |
| Hydraulic brake circuit | 54 | 6.0% | 22,000 | 8,000–50,000 |
| Seat belts | 51 | 5.7% | 77,000 | 55,000–100,000 |
| Transmission and driveline | 43 | 4.8% | 51,000 | 40,000–80,000 |
| Tyres | 38 | 4.3% | 40,000 | 20,000–89,000 |
Where your car sits
Failure reports by the odometer reading they were filed at. Pick the anchor nearest your car — or type the exact mileage: your marker lands on this curve and on the timing chart above.
Figure 3 · Mercury Grand Marquis 1998–2002 · 419 reports with mileage
Share of reports below each mileage
Share of mileage-tagged reports filed at or below each odometer reading. Steps rise only at bin edges, by exact counted shares.
- 60,000 mi — 38% of reports below
- 90,000 mi — 59% of reports below
- 120,000 mi — 76% of reports below
- Median — the staircase crosses the 50% line here
- Your odometer — appears after you enter it below
The staircase tops out at 95%: the remaining 4.5% of reports (19) came above 200,000 miles.
Nothing is smoothed or interpolated. Linear axis, same as Figure 1.
Source: NHTSA Office of Defects Investigation, public domain.
At 60,000 miles
38% of the failure reports on this generation came below this mileage. That describes reports, not your odds.
Reported earlier than this mileage — ask for repair records
- Hydraulic brake circuit — median 22,000 mi
In the reporting window
- Engine and its cooling system — middle half 57,000–113,000 mi
- Steering — middle half 54,000–140,000 mi
- Throttle and speed control — middle half 40,000–108,000 mi
- Electrical system — middle half 26,000–124,000 mi
- Suspension — middle half 31,000–105,000 mi
Mostly reported later
- Exterior lighting — middle half 72,000–140,000 mi
At 90,000 miles
59% of the failure reports on this generation came below this mileage. That describes reports, not your odds.
Reported earlier than this mileage — ask for repair records
- Hydraulic brake circuit — median 22,000 mi
In the reporting window
- Engine and its cooling system — middle half 57,000–113,000 mi
- Steering — middle half 54,000–140,000 mi
- Throttle and speed control — middle half 40,000–108,000 mi
- Exterior lighting — middle half 72,000–140,000 mi
- Electrical system — middle half 26,000–124,000 mi
- Suspension — middle half 31,000–105,000 mi
At 120,000 miles
76% of the failure reports on this generation came below this mileage. That describes reports, not your odds.
Reported earlier than this mileage — ask for repair records
- Engine and its cooling system — median 88,000 mi
- Throttle and speed control — median 60,000 mi
- Suspension — median 50,000 mi
- Hydraulic brake circuit — median 22,000 mi
In the reporting window
- Steering — middle half 54,000–140,000 mi
- Exterior lighting — middle half 72,000–140,000 mi
- Electrical system — middle half 26,000–124,000 mi
Which systems, and when
Complaints about this generation are not spread evenly across the vehicle, and the systems that generate the most of them do not all fail at the same point in a car's life. The median failure across all systems here is 78,000 miles; the figures below show which parts of the car run ahead of that and which run behind.
The engine and its cooling system accounts for 11.3% of complaints (101 reports, 60 of them with a mileage figure), with a median of 88,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 57,000 and 113,000 miles.
The steering accounts for 8.8% of complaints (79 reports, 37 of them with a mileage figure), with a median of 88,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 54,000 and 140,000 miles.
Throttle and speed control accounts for 8.7% of complaints (78 reports, 42 of them with a mileage figure), with a median of 60,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 40,000 and 108,000 miles.
The exterior lighting accounts for 8.3% of complaints (74 reports, 48 of them with a mileage figure), and it fails late — a median of 118,000 miles, considerably beyond the vehicle's overall median. That pattern is consistent with normal service life rather than a defect, though it matters for anyone buying an example already near that mileage. The middle half of these reports falls between 72,000 and 140,000 miles.
The electrical system accounts for 8.1% of complaints (72 reports, 39 of them with a mileage figure), with a median of 75,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 26,000 and 124,000 miles.
The suspension accounts for 7.6% of complaints (68 reports, 23 of them with a mileage figure), and it fails early — a median of 50,000 miles, well before the vehicle's overall median. Failures clustered this far below the rest of the car usually point to a design or manufacturing problem rather than wear, because wear does not selectively target one system on low-mileage examples. The middle half of these reports falls between 31,000 and 105,000 miles.
Differences between model years
Within this generation, complaint volume is not constant across model years. The 2000 model year drew the most — 216 complaints — while 2002 drew the fewest at 101. The median year sits at 202.
Recalls and what they cover
No recall campaigns covering this generation appear in NHTSA's post-2010 recall file. That is not the same as an absence of problems — recalls address safety defects specifically, and many of the complaints above concern faults that are expensive or annoying without meeting that threshold.
Reported severity
What owners reported alongside the failure itself, out of 894 complaints against this generation:
- Crashes
- 96 (10.7%)
- Fires
- 22
- Injury reports
- 59
- Fatality reports
- 3
These flags are self-reported by complainants and unverified by NHTSA; one report can carry several flags, so the counts overlap and do not sum to a total. They are not adjusted for how many of these vehicles are on the road. No chart is drawn here on purpose: overlapping counts spanning very different magnitudes cannot be honestly encoded as lengths.
Documented problems
Intake Manifold (composite) 1998–2001
Same 4.6L 2-valve composite intake manifold coolant-crossover cracking as the previous generation; the 2005 class-action settlement covered 1996-2001 model years, and the redesigned manifold with an aluminum crossover arrived around 2002.
Rear Air Suspension 1998–2002 (so–equipped)
Air spring and compressor leaks on air-suspension-equipped cars produce rear-end sag and compressor burnout.
By model year
| Year | Complaints | With mileage |
|---|---|---|
| 1998 | 168 | 50 |
| 1999 | 202 | 72 |
| 2000 | 216 | 114 |
| 2001 | 207 | 118 |
| 2002 | 101 | 65 |
What owners reported
While driving or backing at slow speeds this vehicle(which has very very low miles) makes loud,banging,pounding,binding noises and sounds like the entire front end is going to fall off. This happens frequently and is not normal for any car with such low miles 15 years old or not. I have gotten to the point that i am…
1998 · 31,000 miles · Suspension
My 1998 Mercury Grand Marquis at slow speed had the passenger side tie rod end fail and fall off causing complete loss of steering. This happened at a slow speed luckily no accident. Car towed to Ford dealer. Replaced all four tie rod ends. Cost $400.00. Car had 50,000 miles , this was a factory defect. This is a…
1998 · 50,000 miles · Steering
Consumer stated the passenger's side front seat belt retractor will not release the belt. The consumer tried pulling the seat belt out of retractor, instead the seat belt began to retract tighter and tighter. Consumer had to be cut out of seat belt. *Ak consumer had to cut the seat belt to be released. There were two…
1998 · 56,000 miles · Seat belts
the contact owns a 1998 Mercury Grand Marquis. While the vehicle was parked the contact heard a loud booming noise from inside his home. The contact noticed flames underneath the hood. The fire department extinguished the fire and a report was filed. The vehicle was destroyed. The manufacturer was made aware of the…
1998 · 63,000 miles · Throttle and speed control
Built from 419 NHTSA complaints with mileage · snapshot 2026-08-18 · open data · reproduce this page