Keystone Cougar vs Mercury Marquis
Both cars' complete complaint records, side by side.
Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.
| Measure | Keystone Cougar | Mercury Marquis |
|---|---|---|
| Complaints on file | 201 | 501 |
| Model years covered | 2000–2026 | 1977–2004 |
| Worst model year | 2004 | 1997 |
| Best model year | 2007 | 2004 |
| Crashes reported | 3 | 48 |
| Fires reported | 8 | 37 |
| Injuries reported | 3 | 43 |
| Deaths reported | 0 | 0 |
| Most complained-about part | Tires | Engine & Cooling |
| Share of complaints involving harm | 7% | 25.5% |
Keystone Cougar by year
What breaks
Tires
52
25.9%
Body & Structure
42
20.9%
Equipment & Accessories
37
18.4%
Suspension
22
10.9%
Electrical System
12
6.0%
Other & Unspecified
11
5.5%
Brakes
9
4.5%
Wheels
9
4.5%
Mercury Marquis by year
What breaks
Engine & Cooling
67
13.4%
Brakes
65
13.0%
Electrical System
61
12.2%
Acceleration & Cruise Control
54
10.8%
Lights
42
8.4%
Steering
28
5.6%
Transmission & Drivetrain
25
5.0%
Suspension
25
5.0%