3rd generation · Ford Panther (revised) · 894 complaints, 419 with mileage
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 87,750 miles), the steering (8.8% of complaints, typically around 87,934 miles), throttle and speed control (8.7% of complaints, typically around 60,000 miles).
| System | Complaints | Share | Typical mileage | Middle half |
|---|---|---|---|---|
| Engine And Engine Cooling | 101 | 11.3% | 87,750 | 57,000–113,000 |
| Steering | 79 | 8.8% | 87,934 | 54,000–140,000 |
| Vehicle Speed Control | 78 | 8.7% | 60,000 | 40,000–108,000 |
| Exterior Lighting | 74 | 8.3% | 118,287 | 72,234–140,000 |
| Electrical System | 72 | 8.1% | 75,000 | 26,000–124,000 |
| Suspension | 68 | 7.6% | 50,000 | 31,000–105,000 |
| Service Brakes, Hydraulic | 54 | 6.0% | 22,047 | 8,000–50,000 |
| Seat Belts | 51 | 5.7% | 77,100 | 55,000–100,000 |
| Power Train | 43 | 4.8% | 51,000 | 39,770–80,000 |
| Tires | 38 | 4.3% | 39,500 | 20,000–89,000 |
| Year | Complaints | With mileage |
|---|---|---|
| 1998 | 168 | 50 |
| 1999 | 202 | 72 |
| 2000 | 216 | 114 |
| 2001 | 207 | 118 |
| 2002 | 101 | 65 |
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 87,750 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 87,934 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 118,287 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 72,234 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.
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.
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.
Of the 894 complaints filed against this generation, 96 reported a crash; 22 reported a fire; 72 reported an injury; 3 reported a fatality. Crash-involved reports represent 10.7% of the total.
These are owner-reported outcomes, not verified investigations, and they are not adjusted for how many of these vehicles are on the road. They are included because the distinction between a fault that strands a car and a fault that causes a collision is the one that matters most, and it is not visible in a complaint count alone.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 41,712 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 87,750, 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.
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.
Air spring and compressor leaks on air-suspension-equipped cars produce rear-end sag and compressor burnout.