2018 Porsche 911 Pre-Purchase Inspection Checklist
Known Issues — 2018 Porsche 911
MINOR
Turbocharger wastegate rattle at cold start
MODERATE
Carbon buildup on intake valves requiring periodic walnut blasting
MODERATE
PDK valve body wear on high-mileage units
MODERATE
Oil separator failure causing oil consumption
MODERATE
Coolant seepage near turbocharger plumbing
MINOR
PCM (infotainment) touchscreen responsiveness degradation over time
What to Inspect
- Cold start turbo wastegate rattle check
- Intake valve inspection for carbon deposits
- PDK smooth shift verification across all modes
- Check for coolant seepage at turbo plumbing joints
- Test PCM touchscreen and all connected features
- Verify oil separator function and review oil consumption
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Major service (spark plugs, filters, fluids) | every 30,000 miles | $900-$1,500 |
| Intake valve walnut blast cleaning | every 40,000-60,000 miles | $600-$1,000 |
| PDK transmission fluid | every 40,000 miles | $300-$500 |
| Brake fluid flush | every 2 years | $150-$250 |
| Tire replacement (rear 305/30-20) | every 15,000-25,000 miles | $1,200-$1,800 |
| Annual inspection | yearly | $400-$700 |
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