What breaks most · 2002 to 2009 model years
Infiniti G35 problems by year
Owners have filed 1,350 safety complaints with NHTSA about the Infiniti G35 across model years 2002 to 2009. Three years stand out: 2003 for electrical system complaints, 2004 for engine complaints and 2005 for air bags complaints. The quietest years are 2002, 2007 and 2006.
- Years to check closely: 2003, 2004, 2005
- Fewest complaints: 2002, 2007, 2006
- Complaints on file
- 13502002 to 2009, all trims
- Worst year
- 2003532 complaints
- Crashes reported
- 6718 fires · 39 injuries · 4 deaths
- Typical failure mileage
- 80kMedian where owners gave mileage
- Recall campaigns
- 17Across 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 | Air bags (1) | |
| 532 | 15 | 7 | Electrical system (220) | |
| 244 | 17 | 3 | Engine (43) | |
| 215 | 9 | 1 | Air bags (46) | |
| 145 | 7 | 2 | Engine and cooling (21) | |
| 114 | 8 | 3 | Air bags (30) | |
| 95 | 10 | 1 | Air bags (33) | |
| 2 | 1 | 0 | Electrical system (1) |
What fails on the 2003 Infiniti G35
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Electrical systemAlternators, starters and ignition | 41% |
220 | 3 | Shop electrical system parts for the 2003 Infiniti G35 |
| VisibilityMirrors and glass | 13% |
68 | 1 | Shop visibility parts for the 2003 Infiniti G35 |
| Engine and coolingRadiators, thermostats and cooling | 13% |
67 | 1 | Shop engine and cooling parts for the 2003 Infiniti G35 |
| EngineEngine gaskets and seals | 12% |
62 | 0 | Shop engine parts for the 2003 Infiniti G35 |
| Exterior lightingHeadlights, tail lights and bulbs | 10% |
54 | 0 | Shop exterior lighting parts for the 2003 Infiniti G35 |
| Equipment and infotainment | 9% |
48 | 0 | — |
| Brakes (hydraulic)Brake pads, rotors and calipers | 8% |
43 | 1 | Shop brakes (hydraulic) parts for the 2003 Infiniti G35 |
| Powertrain and transmissionTransmission parts | 4% |
22 | 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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My infiniti climate control has quit working which has left me with a car with no heat or defrost unable to drive in the winter. Their was a recall on many 2003 g35 but i have been told that my car isnt covered. Seems too much of a coincidence my car is doing exact complaint on many other cars.
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Car has unintended acceleration that can only be stopped by turning off ignition key. This happens without warning. When stopped and foot on brake car accelerates to top rpm then brake goes to floor resulting in no control of car.
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Air bag system i bought the vehicle like that fuel pump and gas tank safety is ben loose brake s car stops driving brake locks
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 G35 years have the most problems?
By NHTSA complaint volume, 2003, 2004, 2005 carry the most filings on the Infiniti G35. The 2003 alone has 532 complaints, led by electrical system.
What is the most common Infiniti G35 problem?
On the 2003 model year, the most-reported component is electrical system with 220 complaints. The table above lists the top components for every year.
At what mileage do Infiniti G35 problems start?
The median mileage at failure across all Infiniti G35 complaints that include mileage is about 80,000 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.