2021 Porsche 911 Pre-Purchase Inspection Checklist
Known Issues — 2021 Porsche 911
MINOR
PCM software issues causing navigation and audio glitches
MODERATE
Carbon buildup on intake valves from direct injection
MINOR
PDK 8-speed occasional harsh shift under aggressive driving
MINOR
Rear wiper motor failure on Targa models
MINOR
Sport exhaust valve rattle at cold idle
MINOR
TPMS sensor battery depletion on older sets
What to Inspect
- Software update status on PCM and all control modules
- Compression and leakdown test — verify no bore scoring developing
- Check PDK 8-speed for smooth engagement across all drive modes
- Inspect rear-axle steering and all chassis electronics
- Test all cameras, sensors, and ADAS features
- Review service history for dealer-performed maintenance
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Major service (spark plugs, filters, fluids) | every 30,000 miles | $1,000-$1,600 |
| Intake valve walnut blast cleaning | every 40,000-60,000 miles | $600-$1,000 |
| 8-speed PDK fluid | every 40,000 miles | $350-$550 |
| Brake fluid flush | every 2 years | $150-$250 |
| Tire replacement (rear 305/30-20) | every 15,000-25,000 miles | $1,400-$2,000 |
| Annual inspection | yearly | $500-$800 |
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