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Fuel systemPart report

2021 Audi A6 Fuel system Problems

Complaints
1about this part
Share
6%of 18 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 1 complaints about the fuel system of the 2021 Audi A6, 6% of the 18 complaints for this model year. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“While operating the vehicle under normal driving conditions, the vehicle suffered an immediate, un-commanded loss of engine power and throttle response. The vehicle displayed a critical dashboard restriction stating: “Maximum engine speed 2500 RPM”, forcing an emergency limp-home mode that instantly created a roadway collision hazard. …”

NHTSA complaint #11765960, filed 2026-09

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
2026229%
2025117%
202116%
202014%
201922%
2018436%
2016918%
201529%
2014820%
2013815%
20121118%
200834%
200724%
200611%
2004926%
20032132%
20021517%
20011917%
20002316%
19993918%
19983527%
199715%

Other parts of the 2021 Audi A6

Electrical system
11 complaints
Engine
3 complaints
Forward collision avoidance
2 complaints
Other or unknown
2 complaints
Transmission and drivetrain
2 complaints
Engine cooling
1 complaints
Exterior lighting
1 complaints
Steering
1 complaints
Body and structure
1 complaints

← All problems reported for the 2021 Audi A6

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology