AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2004 Infiniti Q45
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $5,000–$8,500
The 2004 Infiniti Q45 has an average reliability rating. Recalls for airbag wiring and brake lights indicate moderate electrical system issues. Complaints about electrical, vehicle speed, and interior systems further suggest potential for repairs.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| airbag wiring | 80,000–120,000 miles | $400–$800 | common |
| brake light switch | 60,000–90,000 miles | $100–$200 | very common |
| vehicle speed control | 100,000–150,000 miles | $300–$700 | occasional |
| steering | 90,000–140,000 miles | $500–$900 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter change every 5,000 miles
- Replace air filters every 15,000 miles
- Transmission fluid change every 30,000 miles
- Inspect brakes every 10,000 miles
- Coolant replacement every 60,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Airbag warning light stays on
- Unresponsive brake lights
- Erratic vehicle speed
- Steering wheel vibrations
Generated by gpt-4o on 8/20/2026. Cost ranges are conservative estimates that account for typical regional variation.