AutoUtility currently tracks 19 official NHTSA owner defect complaints for the 2021 Audi A6. Electrical System issues are the most frequently reported category, appearing in 12 complaints (63.2% of submitted records). Zero crashes, fires, injury reports, or fatality reports are cited across these complaint records. The 2021 Audi A6 belongs to the 8th Generation (C8) platform.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
12 owner complaints submitted to NHTSA ODI for this subsystem.
3 owner complaints submitted to NHTSA ODI for this subsystem.
3 owner complaints submitted to NHTSA ODI for this subsystem.
3 owner complaints submitted to NHTSA ODI for this subsystem.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"My 2021 Audi A6 produces a strong mold and mildew odor from the HVAC/air conditioning system. The smell occurs consistently after the air conditioning is turned off and persists when entering the vehicle. The issue appears to originate from mold growth on the evaporator coil or dampers, likely..."
"The contact owns a 2021 Audi A6. The contact stated while driving at an undisclosed speed, the vehicle overheated. The engine overheating and the low coolant warning light illuminated. In addition, the engine seized. The vehicle was taken to the dealer where it was diagnosed with a coolant leak and..."
"Thermostat housing and oil cooler bracket leaking coolant with only 56k miles on the car"
"I was driving my vehicle when the engine surged and then a transmission warning light came on and there was an immediate and complete loss of drive power. After the vehicle glided to a stop, there was no drive transmission in either forward or reverse. There was no pre-warning and no earlier..."
"My alternator was not working and it was a recall and I paid to fix it and they don’t wanna pay me back. I got a new part from audi and fix it at the shop and they don’t wanna pay anything just called and she said we don’t pay only if he’s done at the dealer. And I don’t believe that! Bc dealer..."
Reported defect complaint volume across sibling model years (2015–2026)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 Audi A6 | 27 | 3 | 5 | View 2015 Problems → |
| 2016 Audi A6 | 70 | 0 | 4 | View 2016 Problems → |
| 2017 Audi A6 | 25 | 0 | 4 | View 2017 Problems → |
| 2018 Audi A6 | 6 | 0 | 2 | View 2018 Problems → |
| 2019 Audi A6 | 114 | 2 | 7 | View 2019 Problems → |
| 2020 Audi A6 | 26 | 0 | 9 | View 2020 Problems → |
| 2021 Audi A6 Current Page | 19 | 0 | 11 | Current |
| 2022 Audi A6 | 7 | 0 | 6 | View 2022 Problems → |
| 2023 Audi A6 | 2 | 0 | 1 | View 2023 Problems → |
| 2024 Audi A6 | 1 | 0 | 1 | View 2024 Problems → |
| 2025 Audi A6 | 10 | 0 | 3 | View 2025 Problems → |
| 2026 Audi A6 | 0 | 0 | 0 | View 2026 Problems → |
Complete distribution of consumer defect reports across all 12 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 8 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 1 | 0 | 0 | 0 | 0 |
| Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING | 1 | 0 | 0 | 0 | 0 |
| Forward Collision Avoidance NHTSA category: FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,POWER TRAIN,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Structure & Body NHTSA category: STRUCTURE | 1 | 0 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| VISIBILITY/WIPER,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2021 Audi A6
In official NHTSA consumer records, the most frequently cited issue area for the 2021 Audi A6 is Electrical System, appearing in 12 records (63.2% of submitted filings).
Secondary reported categories include Engine & Cooling (3) and Powertrain & Transmission (3).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 19 consumer defect complaints and 11 safety recall campaigns for the 2021 Audi A6.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Consumer complaint records on file with NHTSA for the 2021 Audi A6 cite zero crashes, zero fires, and zero injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.