2005 Audi A6: common problems and reliability

Is 2005 a good year for the A6?

Across the 25 A6 model years we track, complaint volume runs from 1 (2023) to 231 (1999). With 91 complaints, the 2005 A6 sits abovethe model's median of 59.

These are raw NHTSA complaint totals, not adjusted for how many cars sold or how long each model year has been on the road. Older and higher-selling years accumulate more complaints.

Where owners report problems

What owners report on the 2006-2011 A6

Owners of the 2006-2011 A6 express a deeply divided sentiment. Many praise the 3.0 TDI diesel engine as a reliable and strong powertrain, and the 3.0T supercharged V6 is also noted as one of Audi's better engines. However, the overwhelming consensus is that th

• Timing chain tensioner failure (especially on 3.2L V6): Frequency: recurrent. Can require a full engine replacement costing $8,000+.
• Water pump and thermostat failure: Frequency: very frequent. A common recurring expense.
• PCV valve failure: Frequency: recurrent. Can cause major oil leaks and rear timing cover damage if not addressed.
• MMI/radio amp failure due to water ingress from sunroof drains: Frequency: recurrent.
• Carbon buildup on intake valves: Frequency: recurrent. Common on direct-injection engines.

Owner insights for the 2006-2011 A6. Read the full 2006-2011 owner report.

Typical used price

Used A6 listings typically run $15,991–$61,219 across 2015 to 2026 model years.

Compare the A6 against its rivals