2021 Audi A3 Pre-Purchase Inspection Checklist
Known Issues — 2021 Audi A3
MODERATE
Carbon buildup on TFSI intake valves
MODERATE
S tronic 7-speed shudder in stop-and-go on new platform
MODERATE
PHEV battery management software faults on 45 TFSI e
MINOR
MMI touch screen ghost inputs on some early production units
MODERATE
ADAS false positive emergency braking
MINOR
Early software bugs requiring dealer updates
What to Inspect
- Test S tronic in city stop-and-go for shudder
- For PHEV: verify EV range and charging capability
- Test MMI touchscreen for ghost inputs
- Verify all ADAS features — adaptive cruise, lane centering
- Scan all modules for fault codes
- Confirm all software updates applied
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 10,000 miles | $110-$150 |
| S tronic service | every 40,000 miles | $280-$400 |
| Spark plugs | every 40,000 miles | $130-$170 |
| PHEV battery health check (if equipped) | annually | $100-$200 |
| Brake fluid flush | every 2 years | $80-$120 |
| Intake valve cleaning (walnut blast) | every 60,000-80,000 miles | $400-$600 |
| Cabin filter + air filter | every 20,000 miles | $70-$100 |
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