What breaks most · 2004 to 2007 model years
Mercury Montego problems by year
Owners have filed 259 safety complaints with NHTSA about the Mercury Montego across model years 2004 to 2007. One year stands out: 2005 for powertrain and transmission complaints. The quietest years are 2004.
- Years to check closely: 2005
- Fewest complaints: 2004
- Complaints on file
- 2592004 to 2007, all trims
- Worst year
- 2005135 complaints
- Crashes reported
- 163 fires · 12 injuries · 0 deaths
- Typical failure mileage
- 70kMedian where owners gave mileage
- Recall campaigns
- 3Across 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 |
|---|---|---|---|---|
| 3 | 0 | 0 | Powertrain and transmission (1) | |
| 135 | 10 | 2 | Powertrain and transmission (49) | |
| 85 | 5 | 0 | Powertrain and transmission (28) | |
| 36 | 1 | 1 | Speed control and throttle (12) |
What fails on the 2005 Mercury Montego
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Powertrain and transmissionTransmission parts | 36% |
49 | 3 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| Electrical systemAlternators, starters and ignition | 20% |
27 | 1 | Shop electrical system parts for the 2005 Mercury Montego |
| Speed control and throttleThrottle and pedal sensors | 18% |
24 | 2 | Shop speed control and throttle parts for the 2005 Mercury Montego |
| Brakes (hydraulic)Brake pads, rotors and calipers | 12% |
16 | 1 | Shop brakes (hydraulic) parts for the 2005 Mercury Montego |
| EngineEngine gaskets and seals | 7% |
10 | 0 | Shop engine parts for the 2005 Mercury Montego |
| Body and structureDoors, latches and body hardware | 7% |
10 | 1 | Shop body and structure parts for the 2005 Mercury Montego |
| Engine and coolingRadiators, thermostats and cooling | 5% |
7 | 0 | Shop engine and cooling parts for the 2005 Mercury Montego |
| Fuel systemFuel pumps and injectors | 4% |
6 | 0 | Shop fuel system parts for the 2005 Mercury Montego |
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.
-
I own a 2005 mercury montego. While driving various speeds, all of the instrument panel gauges would illuminate and drop to zero and the seat belt indicators would illuminate and chime. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The approximate failure mileage was 135,000
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 Montego years have the most problems?
By NHTSA complaint volume, 2005 carries the most filings on the Mercury Montego. The 2005 alone has 135 complaints, led by powertrain and transmission.
What is the most common Mercury Montego problem?
On the 2005 model year, the most-reported component is powertrain and transmission with 49 complaints. The table above lists the top components for every year.
At what mileage do Mercury Montego problems start?
The median mileage at failure across all Mercury Montego complaints that include mileage is about 70,000 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.