2020 Audi A4 Pre-Purchase Inspection Checklist
Known Issues — 2020 Audi A4
MODERATE
Quattro rear differential oil seal leaks on AWD models
MODERATE
ADAS camera calibration drift causing lane departure false warnings
MODERATE
Carbon buildup on intake valves requiring periodic cleaning
MINOR
MMI infotainment system slow boot times and occasional freezes
MINOR
Mild front subframe bushing wear at higher mileages
MODERATE
Oil consumption up to 1 quart per 1,000 miles on some TFSI engines
What to Inspect
- Check oil level and ask about consumption between oil changes
- Check for quattro rear differential oil leaks under vehicle
- Test all ADAS systems including automatic emergency braking
- Verify MMI responsiveness and OTA update status
- Scan all modules for fault codes
- Inspect front subframe bushings for play
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 10,000 miles | $130-$170 |
| DSG S tronic service | every 40,000 miles | $300-$450 |
| Spark plugs | every 40,000 miles | $150-$200 |
| Quattro rear differential fluid | every 40,000 miles | $150-$220 |
| Brake fluid flush | every 2 years | $100-$150 |
| Pollen/cabin filter + air filter | every 20,000 miles | $80-$120 |
| Brake pads and rotors (front) | every 40,000-60,000 miles | $400-$700 |
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