Problems owners report
Complaints filed with NHTSA about the 2021 Audi A6, by the system named in each complaint. One complaint can name several.
- Electrical system11
- Engine3
- Forward collision avoidance2
- Power train2
- Unknown or other2
- Fuel/propulsion system1
- Structure1
- Exterior lighting1
- Engine and engine cooling1
- Steering1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
New York safety inspections
At its first New York inspection the 2021 Audi A6 failed the safety check 0.63% of the time — 33% less often than the average 2021 passenger car (0.95%). Median odometer at inspection: 20,466 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Registered new in Europe in 2021
9,658 new Audi A6 cars were registered in the EU, Norway and Iceland in 2021; the largest markets were Germany (4,402), Poland (1,439), Spain (729).
- Average mass
- 1,856 kg
- Average CO₂
- 123 g/km (WLTP)
- Average power
- 169 kW
- Fuel type recorded
- Diesel 64% · Petrol/electric 25% · Petrol 10%
European Environment Agency, CO₂ emissions from new passenger cars · averages weighted by registrations; CO₂ is the type-approval value; fuel type as recorded at registration, where many non-plug-in hybrids appear as petrol · re-use permitted with acknowledgement
Real-world fuel consumption
2,313 Audi A6 cars first registered in Europe in 2021 report their fuel use through the on-board meter. Diesel hybrid versions use 6.9 l/100 km on the road against 5.8 in the WLTP test (+19%).
| Fuel | Cars | On the road | WLTP | Difference |
|---|---|---|---|---|
| Petrol hybrid | 263 | 9.0 | 7.7 | +17% |
| Diesel | 247 | 6.7 | 5.8 | +16% |
| Diesel hybrid | 1,233 | 6.9 | 5.8 | +19% |
| Plug-in hybrid | 570 | 6.7 | 1.3 | +435% |
Litres per 100 km from the cars' own fuel meters (OBFCM), collected in 2024; the year is the year of first registration. All years together · European Environment Agency · CC BY 4.0
Engines
The most common engines in 2021 Audi A6 cars on Dutch roads are the 2.0 hybrid (195 kW, 261 hp), 2.0 hybrid (185 kW, 248 hp) and 2.0 hybrid (150 kW, 201 hp).
| Engine | Power | Cars |
|---|---|---|
| 2.0 hybrid | 195 kW 261 hp | 147 |
| 2.0 hybrid | 185 kW 248 hp | 61 |
| 2.0 hybrid | 150 kW 201 hp | 45 |
RDW Open Data (CC0): registered passenger cars and their fuel data · engine size rounded to 0.1 litre, net maximum power · versions with at least 20 cars
In the Netherlands
272 first registered in 2021 are on Dutch roads; 67% arrived later as imports. Median list price when new: €81,048.
Most common APK defects
- Bandenspanning niet op juiste waarde65
- Dimlicht onjuist afgesteld26
- Band(en) aanwezig met een profieldiepte van 1,6 t/m 2,5 mm15
- Band beschadigd11
- Band onvoldoende profiel10
- Ruitenwisserinstallatie geeft onvoldoende zicht7
- Montage band niet volgens voorschriften4
- Retroreflector vertoont gebrek2
Colours
RDW Open Data: registered vehicles and APK defects (CC0) · defect descriptions in the RDW's Dutch wording
In the United Kingdom
4,330 cars built in 2021 were licensed for the road at the end of 2025, and 106 more were declared off the road (SORN).
Department for Transport and DVLA, vehicle licensing statistics (table VEH0124, year of manufacture) · Open Government Licence v3.0
MOT test results in Great Britain
In 2023, 246 of these cars first registered in 2021 took their annual MOT test. 93% passed first time; among all cars first registered in 2021 the figure was 91%.
| Failed on | These cars | All cars from 2021 |
|---|---|---|
| Tyres | 3.3% | 3.3% |
| Noise, emissions and leaks | 2.0% | 0.4% |
| Brakes | 0.4% | 1.3% |
| Lamps, reflectors and electrical equipment | 0.4% | 2.9% |
| Seat belts and supplementary restraint systems | 0.4% | 0.3% |
| Visibility | 0.4% | 1.6% |
DVSA anonymised MOT tests and results, 2023 (Department for Transport) · Open Government Licence v3.0 · first tests only; a fix made at the test station within the hour still counts as a fail
In Finland
181 of these cars first registered in 2021 were in use in Finland on 30 Jun 2026, with an average of 85,000 km on the odometer at their last inspection.
Traficom (Finnish Transport and Communications Agency), open data on vehicles in use · CC BY 4.0
In New Zealand
25 2021 cars are on the New Zealand register; 12% arrived as used imports, 88% were sold new in New Zealand.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Crash-test ratings
NHTSA 5-star results for 1 variant; 1 of 1 rated variants score five stars overall. Rollover risk is the estimated chance of rolling over in a single-vehicle crash.
| Variant | Overall | Rollover risk |
|---|---|---|
| 2021 Audi A6 4 DR AWD | ★★★★★ | 8.9 % |
- Electronic stability control
- Standard
- Forward collision warning
- Standard
- Lane departure warning
- Standard
- Best overall rating
- 5 / 5
NHTSA New Car Assessment Program (5-Star Safety Ratings), api.nhtsa.gov · US federal work, public domain
Fuel consumption
Official Canadian test results for 2 variants: combined 9.2–9.7 L/100 km (about 24–26 mpg US), CO₂ 214–227 g/km.
| Variant | City | Highway | Combined |
|---|---|---|---|
| A6 Sedan 45 TFSI quattro · Mid-size · Premium gasoline | 10.3 | 7.8 | 9.2 |
| A6 Sedan 55 TFSI quattro · Mid-size · Premium gasoline | 10.9 | 8.2 | 9.7 |
Litres per 100 km. Natural Resources Canada, Fuel consumption ratings (open.canada.ca) · Open Government Licence – Canada
Recalls in Canada
10 Transport Canada recalls for the 2021 Audi A6.
| 2025713 19 Dec 2025 | Visual System Issue: On certain vehicles, a software problem could cause the rearview camera image not to appear on the display. Canadian regulations require the rearview i… |
| 2025167 31 Mar 2025 | Lights And Instruments Issue: On certain vehicles, a problem with the instrument cluster (virtual cockpit) could cause it to shut down. If this happens, you may not be able to see … |
| 2023286 12 May 2023 | Brakes Issue: Certain vehicles were built with a European-specification brake fluid reservoir cap instead of the correct North American cap. Canadian regulations req… |
| 2022660 21 Nov 2022 | Electrical Issue: On certain vehicles, if you spill liquid on the rear seat, the gateway control module could be damaged. If this happens, the vehicle may enter emergenc… |
| 2022565 5 Oct 2022 | Visual System Issue: On certain vehicles, a software problem could cause the rearview camera image not to appear on the display. Canadian regulations require the rearview i… |
| 2022114 14 Mar 2022 | Fuel System Issue: On certain vehicles, the fuel level sender may get stuck. If this happens, the fuel gauge can show a higher fuel level than what is actually in the fue… |
| 2022022 26 Jan 2022 | Suspension Issue: On certain vehicles, the rear wheel alignment was not checked during recall 42L1 (Transport Canada Recall 2021-249). As a result, the steering could pu… |
| 2021486 4 Aug 2021 | Seats And Restraints Issue: On certain vehicles, the passenger seat belt assemblies may contain defective automatic locking retractors (ALR). As a result, the seat belts may not p… |
| 2021249 26 Apr 2021 | Suspension Issue: On certain vehicles, the lock nuts for the rear trailing arm bolts may be defective. If a nut breaks, there could be sudden changes in rear wheel align… |
| 2021132 10 Mar 2021 | Airbag Issue: On certain vehicles, a problem with the instrument panel cover may cause the passenger-front airbag not to inflate properly in a crash. This could also… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2026 vehicles. Please see the recall report for a complete list of models. A software error may prevent the rearview camera image from displaying as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 SQ8, A6 SEDAN, A7, A8, Q7, Q8, RS6 Avant, RS7, RSQ8, S6 SEDAN, S7, S8, A6 Allroad, and SQ7 vehicles. Due to a software error, the instrument panel display may fail.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi S7, S6 Sedan, RS7, RS6 Avant, A6 Allroad, 2019-2021 A7, and A6 Sedan vehicles. An incorrectly labeled brake fluid cap may have been installed, which can result in the use of the wrong type of brake fluid.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2020-2022 Audi S7, S6 Sedan, A6 Allroad, 2021-2022 RS7, RS6 Avant, 2019-2022 A7, and A6 Sedan vehicles. Liquid spilled in the rear seat may penetrate and cause the gateway control module to shut down.
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Audi A8, RS7, RS6 Avant, RS5 Sportback, RS5 Coupe, Q8, Q7, Q5 Sportback, S4 Sedan, Q5, A7, A6, A6 Allroad, A5 Sportback, A5 Coupe, A5 Cabrioleet, A4 Sedan, A4 Allroad, E-Tron Sportback Quattro, SQ7, S5 Cabriolet, E-Tron Quattro, SQ8, SQ5 Sportback, SQ5, S8, S7, S6 Sedan, S5 Sportback, S5 Coupe, 2022 E-Tron GT, and 2021-2022 RSQ8 vehicles. Due to a software issue, a blank or black screen may be displayed instead of the rearview camera image when the vehicle is placed in reverse gear. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 RS6 Avant and RS7, 2020-2022 A6 Allroad, S6 Sedan, and S7, and 2019-2022 A6 Sedan and A7 vehicles. The fuel level sender may stick, causing an inaccurate fuel level reading to be displayed on the instrument cluster.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A5 Sportback, RS5 Coupe, RS5 Sportback, S5 Sportback, 2020-2021 A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A6 Allroad, A6 Sedan, A7, A8, Q5, S4 Sedan, S5 Coupe, S5 Cabriolet, S6 Sedan, S7, S8, SQ5, 2021 Q5 Sportback, Q7, Q8, RS6 Avant, RS7, RSQ8, SQ5 Sportback, SQ7, and SQ8 vehicles. The rear axle alignment may not have been inspected after the repairs for Recall 21V-295 (42L1) were performed.
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021 Volkswagen ID4, Audi A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A5 Sportback, A6 Allroad, A6 Sedan, A7, A8, E-Tron Quattro, E-Tron Sportback Quattro, Q3, Q5, Q5 Sportback, Q7, Q8, RS5 Sportback, RS5 Coupe, RS6 Avant, RS7, RSQ8, S4 Sedan, S5 Cabriolet, S5 Coupe, S5 Sportback, S6 Sedan, S7, S8, SQ5, SQ5 Sportback, SQ7, SQ8, and 2021-2022 S3 Sedan vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi RS6 Avant, RS7, 2020-2021 A6 Allroad, S6 Sedan, S7, 2019-2021 A6 Sedan, and A7 vehicles. The score line on the passenger air bag may not have been manufactured correctly.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi A6 Allroad, Q7, RS6 and RS7 vehicles. The electrical connector can detach from the door crash sensor in either of the front doors.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Audi told its dealers about the 2021 Audi A6: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 11011316 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year. Updated affected vehicle chart & owner notification letters to reflect the addition of the next wave of vehicles. |
| 11011314 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year. Updated affected vehicle chart & owner notification letters to reflect the addition of the next wave of vehicles. |
| 11011307 | This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module. |
| 11011303 | This bulletin provides information when the anti-theft alarm activates for no reason, or when the anti-theft alarm does not activate. |
| 11011296 | This bulletin provides service-info relating to lithium-ion high-voltage batteries; determining energy content. |
| 11011285 | This TSB Provides information when parking assistance provides false warnings. |
| 11011282 | This bulletin provides information when speaker rattles, vibrations, or audio interference is noted. |
| 11011277 | This bulletin provides information when the parking brake does not work sporadically; DTC B107BF0 or B10FCF0 stored in the driver assist systems. |
| 11011276 | This TSB provides information when DTCs U142100 and U164200 are stored as passive/sporadic in the gateway. |
| 11011274 | This bulletin provides information when the restricted function icon for Audi Pre sense is displayed after engine starts. |
| 11011273 | This bulletin provides information when DTC B187A00 is stored: Park steer assist cancelation (symptom number 98341). |
| 11011272 | This bulletin provides information when the overhead view camera (TopView) calibration fails. |
| 11011268 | This bulletin pertains to complaints/general information regarding SOS Emergency Assist. |
| 11011263 | This bulletin provides information regarding cleaning exterior glass. |
| 11011256 | This bulletin provides information when the DTCs B200FF0 to B200FF5 are stored in the J775 suspension control unit. |
| 11011249 | This TSB provides info when there is a 48V vehicle electrical system warning, DTC U046900 stored in the ECM. |
| 11011240 | This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool |
| 11009998 | This special notice is to inform dealers to return the parts listed and only order the successor parts going forward. |
| 11009990 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year. Updated parts table in parts section. |
| 11009989 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year.Updated affected vehicle chart & owner notification letters to reflect the addition of 2022 model year. |
| 11009985 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year. Updated parts table in parts section. |
| 11009984 | Under this service action, Audi dealers will replace the starter-alternator in affected vehicles at no cost to owners. A defective starter-alternator may inhibit start/stop functionality which could increase CO2 and other emissions while the vehicle is stopped. Emissions still remain within certification standards. Updated affected vehicle chart & owner notification letters to reflect the addition of 2021 model year.Updated affected vehicle chart & owner notification letters to reflect the addition of 2022 model year. |
| 11009983 | Vehicle Concerns Before Recall Repair Available |
| 11009967 | This bulletin provides information when there is an issue with wireless charging/wireless charging not working with Audi Phone Box. |
| 11009965 | This bulletin provides information when the calendar function is not available. |
NHTSA manufacturer communications (public domain)