What breaks most · 2006 to 2012 model years
Mercury Mariner Hybrid problems by year
Owners have filed 212 safety complaints with NHTSA about the Mercury Mariner Hybrid across model years 2006 to 2012. One year stands out: 2008 for brakes complaints. The quietest years are 2009, 2007 and 2006.
- Years to check closely: 2008
- Fewest complaints: 2009, 2007, 2006
- Complaints on file
- 2122006 to 2012, all trims
- Worst year
- 2008116 complaints
- Crashes reported
- 80 fires · 1 injuries · 0 deaths
- Typical failure mileage
- 81kMedian where owners gave mileage
- Recall campaigns
- 0Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 34 | 2 | 0 | Engine (11) | |
| 31 | 1 | 0 | Brakes (8) | |
| 116 | 2 | 0 | Brakes (29) | |
| 21 | 2 | 0 | Steering (8) | |
| 9 | 1 | 0 | Speed control and throttle (3) | |
| 1 | 0 | 0 | Brakes (1) |
What fails on the 2008 Mercury Mariner Hybrid
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| BrakesBrake pads, rotors and calipers | 25% |
29 | 1 | Shop brakes parts for the 2008 Mercury Mariner Hybrid |
| EngineEngine gaskets and seals | 24% |
28 | 0 | Shop engine parts for the 2008 Mercury Mariner Hybrid |
| SteeringPower steering pumps, racks and hoses | 21% |
24 | 0 | Shop steering parts for the 2008 Mercury Mariner Hybrid |
| Electrical systemAlternators, starters and ignition | 19% |
22 | 0 | Shop electrical system parts for the 2008 Mercury Mariner Hybrid |
| Fuel systemFuel pumps and injectors | 15% |
17 | 0 | Shop fuel system parts for the 2008 Mercury Mariner Hybrid |
| Powertrain and transmissionTransmission parts | 14% |
16 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| Engine and coolingRadiators, thermostats and cooling | 11% |
13 | 0 | Shop engine and cooling parts for the 2008 Mercury Mariner Hybrid |
| Speed control and throttleThrottle and pedal sensors | 9% |
11 | 0 | Shop speed control and throttle parts for the 2008 Mercury Mariner Hybrid |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
ABS brake light came on, with regen brake disengaged notice appearing, hcu unit failed, seems to be a frequent problem with hybrid
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Mercury Mariner Hybrid years have the most problems?
By NHTSA complaint volume, 2008 carries the most filings on the Mercury Mariner Hybrid. The 2008 alone has 116 complaints, led by brakes.
What is the most common Mercury Mariner Hybrid problem?
On the 2008 model year, the most-reported component is brakes with 29 complaints. The table above lists the top components for every year.
At what mileage do Mercury Mariner Hybrid problems start?
The median mileage at failure across all Mercury Mariner Hybrid complaints that include mileage is about 81,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.