2015 Porsche 911 Pre-Purchase Inspection Checklist
Known Issues — 2015 Porsche 911
IMS bearing failure risk on pre-2009 engines; 991.1 uses updated bearing but inspect service history
Bore scoring on early 991.1 direct-injection engines causing oil consumption and loss of compression
PDK transmission software glitches causing jerky low-speed shifts
HVAC blend door actuator failure leading to improper cabin temperature control
Rear engine lid strut failure causing lid to drop unexpectedly
Coolant leaks from heat exchangers on high-mileage examples
What to Inspect
- Compression test all six cylinders to rule out bore scoring
- Check oil consumption rate — more than 1qt/1000mi indicates bore scoring
- Inspect PDK fluid condition and verify smooth shifts at all speeds
- Look for coolant leaks around heat exchangers and hose connections
- Verify all electronics: PASM, sport chrono, PCM infotainment
- Review complete service history for Porsche-authorized maintenance
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Major service (spark plugs, filters, fluids) | every 30,000 miles | $800-$1,400 |
| 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 |
| Air-oil separator replacement | every 60,000 miles | $300-$600 |
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