What breaks most · 2003 to 2010 model years
Infiniti M45 problems by year
Owners have filed 280 safety complaints with NHTSA about the Infiniti M45 across model years 2003 to 2010. One year stands out: 2003 for fuel system complaints. The quietest years are 2008, 2007 and 2004.
- Years to check closely: 2003
- Fewest complaints: 2008, 2007, 2004
- Complaints on file
- 2802003 to 2010, all trims
- Worst year
- 2003129 complaints
- Crashes reported
- 40 fires · 2 injuries · 0 deaths
- Typical failure mileage
- 88kMedian where owners gave mileage
- Recall campaigns
- 33Across 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 |
|---|---|---|---|---|
| 129 | 0 | 2 | Fuel system (65) | |
| 43 | 0 | 2 | Fuel system (23) | |
| 72 | 2 | 6 | Engine (17) | |
| 27 | 0 | 5 | Air bags (8) | |
| 6 | 0 | 6 | Air bags (3) | |
| 2 | 2 | 6 | Speed control and throttle (2) | |
| 1 | 0 | 6 | Steering (1) |
What fails on the 2003 Infiniti M45
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Fuel systemFuel pumps and injectors | 50% |
65 | 0 | Shop fuel system parts for the 2003 Infiniti M45 |
| EngineEngine gaskets and seals | 18% |
23 | 0 | Shop engine parts for the 2003 Infiniti M45 |
| Electrical systemAlternators, starters and ignition | 17% |
22 | 0 | Shop electrical system parts for the 2003 Infiniti M45 |
| Engine and coolingRadiators, thermostats and cooling | 14% |
18 | 0 | Shop engine and cooling parts for the 2003 Infiniti M45 |
| Fuel System, Other | 9% |
11 | 0 | — |
| Fuel systemFuel pumps and injectors | 5% |
6 | 0 | Shop fuel system parts for the 2003 Infiniti M45 |
| Seats | 4% |
5 | 0 | — |
| Powertrain and transmissionTransmission parts | 3% |
4 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
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.
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Purchased 2003 infiniti m45 in december of 2009. The fuel gauge did not read correctly as of purchase date, always reading half full to full. Dealer inspection found that entire cluster needs replaced.
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 Infiniti M45 years have the most problems?
By NHTSA complaint volume, 2003 carries the most filings on the Infiniti M45. The 2003 alone has 129 complaints, led by fuel system.
What is the most common Infiniti M45 problem?
On the 2003 model year, the most-reported component is fuel system with 65 complaints. The table above lists the top components for every year.
At what mileage do Infiniti M45 problems start?
The median mileage at failure across all Infiniti M45 complaints that include mileage is about 88,000 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.