AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2004 Infiniti M45
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $9,000–$14,000
The 2004 Infiniti M45 has significant issues with the fuel system and a history of electrical complaints. Recalls for fuel gauge inaccuracies and brake light switch failures indicate reliability concerns, impacting the vehicle's overall rating.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| fuel gauge | 70,000–100,000 miles | $200–$450 | very common |
| brake light switch | 50,000–90,000 miles | $100–$200 | common |
| fuel pump | 90,000–120,000 miles | $300–$600 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- oil changes every 5,000 miles
- tire rotations every 10,000 miles
- brake inspections every 20,000 miles
- cooling system flush every 60,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- difficulty starting
- inaccurate fuel gauge readings
- intermittent brake light failures
Generated by gpt-4o on 8/20/2026. Cost ranges are conservative estimates that account for typical regional variation.