AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2002 Infiniti Q45
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $5,000–$8,000
The 2002 Infiniti Q45 has a below-average reliability rating, largely due to engine and sensor issues. Recalls and complaints indicate frequent problems with engine components, including potential failures of the crank and cam position sensors. Electrical and airbag concerns also contribute to potential maintenance challenges.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| Engine sensors | 80,000–120,000 miles | $400–$800 | common |
| Electrical system | 90,000–130,000 miles | $300–$700 | common |
| Airbags | 100,000–150,000 miles | $500–$1,000 | occasional |
| Wheels | 70,000–110,000 miles | $150–$300 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Brake inspections
- Transmission fluid replacement
- Timing belt replacement
- Coolant system flush
- Alignment checks
- Spark plug replacement
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Check engine light on
- Rough idling
- Dim or flickering lights
- Airbag warning light
- Unusual tire wear patterns
Generated by gpt-4o on 8/20/2026. Cost ranges are conservative estimates that account for typical regional variation.