AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2003 Audi S6
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $5,000–$9,000
The 2003 Audi S6 has average reliability with recall issues related to fuel system and electrical system vulnerabilities. Low owner complaint counts suggest potential but not widespread issues, corresponding with typical use for its age and class.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| Fuel tank rollover valve | 80,000–120,000 miles | $500–$1,000 | common |
| Headlight switch wiring | 60,000–100,000 miles | $200–$500 | occasional |
| Fuel system components | 70,000–110,000 miles | $300–$700 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil change every 5,000 miles
- Replace brake pads and rotors every 30,000 miles
- Timing belt at 100,000 miles
- Coolant flush every 50,000 miles
- Transmission service every 40,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Fuel odor from the rear
- Dashboard warning lights
- Unresponsive headlights
- Fuel leakage under the car
Generated by gpt-4o on 8/19/2026. Cost ranges are conservative estimates that account for typical regional variation.