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2004 Audi

A6 Avant quattro

Auto (S5), 6 cyl, 3.0 L

Audi A6: best and worst years
2004 Audi A6 Avant quattro (photo 1 of 4)

Photo may show a different model year; you're viewing the 2004.

PhotoAlexander MiglCC BY-SA 4.0via Wikimedia Commons

Reported problems NHTSA record NHTSA owner complaints, model year

  • FUEL SYSTEM, GASOLINE12%
  • AIR BAGS7%
  • ELECTRICAL SYSTEM7%
  • ENGINE AND ENGINE COOLING7%
  • FUEL/PROPULSION SYSTEM7%
  • SEATS7%

Source: NHTSA owner complaints, 43 total.

Audi A6: best and worst years

Warranty manufacturer terms, by make

Basic
4 yr / 50k mi
Powertrain
4 yr / 50k mi
Roadside assistance
4 yr
Maintenance
3 yr / 30k mi
EV battery
8 yr / 100k mi

Source: media.audiusa.com as of 2026-06

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.