2018 Infiniti Q50 Pre-Purchase Inspection Checklist
Known Issues — 2018 Infiniti Q50
MODERATE
3.0T timing chain tensioner — cold-start rattle indicates wear
MODERATE
Carbon buildup on direct-injection 3.0T intake valves
MODERATE
Oil consumption on 3.0T and Red Sport variants
MINOR
Infotainment touchscreen slow response
MINOR
Front sway bar link wear causing clunking
MINOR
Power steering pump noise on 2.0T models in cold weather
What to Inspect
- 3.0T cold start rattle — timing chain tensioner critical check
- Oil consumption rate over 500 miles
- Intake valve carbon buildup
- Front suspension sway bar links
- Infotainment responsiveness
- Power steering function in cold weather
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Engine oil service | every 5,000-7,500 miles | $70-$120 |
| Major service (plugs, filters, fluids) | every 30,000 miles | $400-$700 |
| Timing chain service if rattling (3.0T) | as needed | $1,500-$3,500 |
| Transmission fluid | every 60,000 miles | $150-$280 |
| Brake pad/rotor replacement | every 25,000-45,000 miles | $350-$650 |
| Intake valve cleaning | every 40,000-60,000 miles | $400-$700 |
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