AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2004 Infiniti G35
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $5,000–$12,000
The 2004 Infiniti G35 shows a below-average reliability due to common engine and electrical issues. Frequent exterior lighting complaints also suggest recurring problems with visibility systems. Several fuel system recalls increase ownership risks.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| engine | 70,000–110,000 miles | $1,500–$3,500 | common |
| electrical system | 60,000–100,000 miles | $800–$2,000 | common |
| brakes | 50,000–90,000 miles | $300–$700 | common |
| fuel system | 50,000–80,000 miles | $200–$600 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil change every 5,000 miles
- Brake fluid every 20,000 miles
- Electrical check annually
- Coolant flush every 30,000 miles
- Transmission service every 30,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Engine misfires or rough idle
- Electric component failures
- Brakes squeaking or not effective
- Fuel smell when refueling
Generated by gpt-4o on 8/20/2026. Cost ranges are conservative estimates that account for typical regional variation.