2021 Audi A6 problems: engine and transmission complaints and recalls
ELEVATED COMPLAINT SIGNAL
35%
9 of 26 relevant owner complaints are about the engine, transmission or fuel system
35% of relevant owner complaints on the 2021 Audi A6 are about the engine, transmission or fuel system. That is elevated. Worth an independent inspection before you commit to one.
Better than 63% of the 1,789 model years we track (2010–2023).
More than most. The pattern is elevated rather than severe. 9 of 26 relevant complaints filed with NHTSA about the 2021 Audi A6 concern the engine, transmission or fuel system (35%), and the largest group is filed under engine (4). For comparison, the 2020 scores 12%. On a test drive, check for stalling, loss of power, rough idle, oil consumption or a check-engine light. This describes the model year, not any one car: a well-maintained or already-repaired example can be fine, and a clean model year can still have a bad car in it.
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
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 c…
ENGINE AND ENGINE COOLING05/11/2026
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 a failed coolant pum…
ENGINE05/10/2026
Thermostat housing and oil cooler bracket leaking coolant with only 56k miles on the car
Three of 9 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Recall campaigns on the 2021 Audi A6 (12)
SEAT BELTS:REAR/OTHER:RETRACTOR
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 S…
TIRES
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 Cabr…
AIR BAGS
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 scor…
This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.
Before you buy a 2021 Audi A6
Ask the seller whether the engine has ever been repaired or replaced, and whether the car has shown stalling, loss of power, rough idle, oil consumption or a check-engine light.
Drive it from a cold start and long enough to warm up. Many engine faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the engine.
12 recall campaigns on this model year. Whether a specific car still has one open depends on the VIN; the report checks that.
Ask for service records. A engine already replaced under warranty is a different car from one that was not.
Questions people ask about the 2021 Audi A6
Does the 2021 Audi A6 have engine problems?
More than most; the pattern is elevated rather than severe. 9 of 26 relevant complaints filed with NHTSA about the 2021 Audi A6 concern the engine, transmission or fuel system (35%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
Are there engine or transmission recalls on the 2021 Audi A6?
NHTSA lists 12 recall campaigns on the 2021 Audi A6. Whether a specific car still has one open depends on its VIN.
Which Audi A6 years are better?
Among the Audi A6 years we track, the 2020 (12%) and the 2014 (32%) have a lower engine and transmission complaint share than the 2021 (35%). Manufacturers fix things mid-generation, so the year before or after can be a different car.
Should I buy a 2021 Audi A6?
That depends on the car in front of you, not just the model year. The 2021 Audi A6 has an elevated engine complaint pattern, so treat it as a car that needs proof: service records showing engine work, a cold-start test drive, and an independent pre-purchase inspection focused on the engine. A well-kept or already-repaired example can be a fine car; an unknown one is a gamble.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental model-level information. This is not a vehicle inspection, vehicle-history
report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition
of any individual vehicle. Combined across 3 body styles NHTSA files separately.