hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
69,867 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Audi A6 fuel system problems

fuel system problem

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2004 Audi A6 Owner Comments

problem #4

Dec 012013

A6 6-cyl

  • miles


Significant gas leak caused by broken gas "in tank sending units" housing and seal. Gas will leak and fill the inside of the car with fums as well as under the car. Replacement required buying a revised design sending units that include all three sending units. The price is high ~$500 and the consequences very dangerous. My car is: 2004 Audi A6 [xxx] 2004 A6Q 2.7T information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Ontario, NY, USA

problem #3

Mar 192011


  • 90,000 miles
The contact owns a 2004 Audi A6. The contact stated that when refueling the vehicle over the three quarter capacity level, a substantial amount of fuel would leak underneath the vehicle near the exhaust pipe. The vehicle was taken to an authorized dealer for diagnostic testing and stated that the fuel tank rollover valve was leaking. The vehicle was not repaired. The contact expressed significant concern of the safety risk involved. The failure mileage was 90,000. The VIN was unavailable.

- North Palm Beach , FL, USA

problem #2

Feb 202011

A6 6-cyl

  • 81,469 miles
2004 Audi A6 sedan, 3.0 engine developed a sudden loss of power just before vehicle stalled while driving on highway at 65 mph. Vehicle was towed to repair shop where it was determined that the fuel pump had failed.

- Hudson, OH, USA

problem #1

Jan 112011


  • 108,000 miles
Car's engine stopped while at a red light. Would not start after failure. Ultimately, cause was determined to be a failed fuel pump. I saw that there was a recall on the fuel pump for 2003 A6 models including 3L vehicles, but not for 2004 models.]

- Larchmont, NY, USA

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