C5
Audi A6 (1998–2004)
Maintenance Schedule
9 recurring services keep the 1998–2004 Audi A6 healthy — starting with oil changes every 3,000 miles. Budget roughly $3,900–6,100 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1998, 1999, 2000, 2001, 2002, 2003, 2004
Full schedule
Intervals follow the factory maintenance schedule for the 1998-2004 Audi A6. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,000 mi or 4 mo | $35–60 | Engine oil and filter replacement |
| Cabin Air Filter | Every 15,000 mi or 12 mo | $28–38 | Cabin air filter replacement |
| Brake Fluid | Every 24,000 mi or 2 yr | $65–90 | Brake fluid replacement |
| Tune-up | Every 30,000 mi or 2 yr | $180–280 | Spark plugs, air filter, fuel filter |
| Transmission Service | Every 60,000 mi or 5 yr | $240–350 | Tiptronic transmission fluid |
| Coolant Flush | Every 60,000 mi or 6 yr | $140–200 | Engine coolant replacement |
| Air Suspension | Every 60,000 mi or 6 yr | $400–650 | Air suspension system service |
| Torsen Differential | Every 60,000 mi or 6 yr | $200–280 | Quattro differential service |
| Timing Belt | Every 80,000 mi or 8 yr | $800–1,200 | Timing belt and water pump replacement |
Common questions
How often should I change the oil on a 1998–2004 Audi A6?
Every 3,000 miles or 4 months, whichever comes first. A typical U.S. shop charges $35–60. Engine oil and filter replacement.
How much does it cost to maintain a Audi A6 (1998–2004)?
Routine maintenance on the 1998–2004 Audi A6 runs roughly $3,900–6,100 over 100,000 miles at typical U.S. shop prices, spread across 9 recurring services. Independent shops usually land near the low end; dealers near the high end.
What is the most expensive scheduled service on this A6?
Timing Belt at $800–1,200, due every 80,000 miles. Timing belt and water pump replacement.
Cost ranges are typical U.S. independent-shop and dealer estimates; your local prices vary. Severe driving — towing, short trips, extreme heat or cold — shortens many intervals. Information here is general and may be estimated or AI-assisted — not professional, medical, or veterinary advice. Verify against your owner's manual, a professional, or your vet before acting. See our Terms & Disclaimer.