The 2021 Audi A6 is a modern MLB Evo platform vehicle with sophisticated tech and strong powertrains, but early C8-generation examples show concerning patterns of catastrophic engine failures on the 3.0T V6 and persistent electronic gremlins that plague the entire lineup.
Symptoms: Low oil pressure warning at idle or startup, Metallic knocking or ticking from bottom end, Check engine light with oil pressure codes (P0524, P06DD), Metal shavings visible in drained oil
Fix: Complete engine rebuild or short block replacement required. This involves dropping subframe and removing engine — 35-45 labor hours. Root cause tied to oil starvation issues or defective bearing material on early production runs. Many techs opt for factory reman long block to avoid comebacks.
Estimated cost: $18,000-28,000
Dual-Clutch Transmission (S tronic) Mechatronic and Oil Cooler Failures
Common · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Harsh or delayed shifts, especially 2-3 and 5-6, Transmission goes into limp mode with P17BF or P189C codes, Burning smell from transmission area, Clunking on takeoff from stop
Fix: Mechatronic unit replacement requires transmission removal or lowering — 12-16 hours. Oil cooler failures contaminate ATF and often require full flush and sometimes clutch pack replacement if debris circulated. Transmission mounts also fail prematurely, contributing to harsh engagement (add 2 hours).
Estimated cost: $4,500-9,500
MMI Infotainment System Crashes and Backup Camera Failures
Common · medium severity
Symptoms: Black screen on startup or random reboots while driving, Backup camera shows 'camera unavailable' or frozen image, Loss of climate control interface (stuck on default settings), Apple CarPlay / Android Auto connectivity drops
Fix: Software updates sometimes resolve early symptoms (1 hour diag + flash). Physical failures require MMI unit replacement (8 hours with calibration) or camera module replacement (3 hours). Audi has issued multiple TSBs but no comprehensive fix. Many units fail out of warranty.
Estimated cost: $1,200-4,800
Rear Axle Carrier Bushing Failures and Subframe Cracks
Occasional · high severity
Typical onset: 50,000-90,000 mi
Symptoms: Clunking or banging over bumps from rear end, Rear-end steering sensation or wandering at highway speeds, Visible tears in rubber bushings or hairline cracks in subframe welds, Uneven rear tire wear
Fix: This is a known MLB Evo weakness affecting multiple VAG products. Bushing replacement is 6-8 hours; if subframe has stress cracks (common), it requires complete replacement with alignment — 12-15 hours. Some owners report repeat failures even after OEM replacement.
Estimated cost: $2,200-5,500
High-Pressure Fuel Pump and Fuel Filter Clogging (2.0T and 3.0T)
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Long crank or no-start when hot, Rough idle with P0087 (fuel rail pressure too low), Loss of power under acceleration, engine stumbling, Fuel smell in cabin or underhood
Fix: HPFP replacement is 4-5 hours on the 2.0T (camshaft-driven, requires timing cover removal). On 3.0T it's 6-7 hours due to intake manifold access. Fuel filter is integrated into in-tank pump assembly on some variants — add 3 hours if contamination traced to tank. Always replace both together if one fails.
Estimated cost: $1,800-3,800
Brake Fluid Contamination / Hydraulic Unit Failures
Occasional · high severity
Symptoms: Soft or spongy brake pedal that doesn't improve with bleeding, ABS / ESC warning lights with C1A13 or C1095 codes, Brake pedal goes to floor intermittently, Active brake assist faults
Fix: Audi issued recall 21V-838 for brake fluid contamination causing corrosion in hydraulic control unit. If unit is damaged, replacement requires bleeding entire system and ABS module coding — 8-10 hours. This is a safety-critical issue; don't ignore soft pedal symptoms.
Estimated cost: $3,500-6,000
Electrical System Gremlins: Faulty Gateway Module and Parasitic Draw
Common · medium severity
Symptoms: Dead battery after 2-3 days of sitting, Random warning lights (airbag, ABS, parking brake) that come and go, Modules fail to communicate during diagnostics (U-codes), Keyless entry works intermittently
Fix: Central gateway module (J533) is a common culprit — 3-4 hours to replace and reprogram all modules. Parasitic draw diagnosis is time-intensive (2-4 hours) and often traces to aftermarket accessories or failing comfort control modules. Battery itself may need registration after replacement (0.5 hour).
Estimated cost: $800-2,500
Owner tips
Change transmission fluid every 40k miles despite 'lifetime fill' claims — cheap insurance against mechatronic failures
Monitor oil consumption religiously on 3.0T V6 models; consumption over 1 qt per 1,000 mi is early warning sign of bearing issues
Keep MMI software updated at dealer to avoid cumulative bug buildup; some camera issues resolve with calibration after windshield replacement
Inspect rear subframe bushings at every alignment — catching tears early prevents subframe damage
Use only top-tier fuel; direct-injection engines are sensitive to low-detergent gas causing injector and valve deposits
Beautiful car with cutting-edge tech, but the 3.0T engine failure risk and expensive electronic issues make 2021 models a gamble unless you have deep pockets or a bulletproof extended warranty — hold out for 2022+ with updated engine components if you want this platform.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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BACK OVER PREVENTION: SENSING SYSTEM: CAMERA · 25V900000
2025-12-19
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."
Consequence: A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.
Remedy: Dealers will update the software, free of charge. Owner notification letters were mailed January 14, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TV. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.
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.
Consequence: An instrument panel display that fails to show critical safety information, such as the speedometer or warning lights, increases the risk of a crash.
Remedy: Dealers will update the instrument panel module software, free of charge. Owner notification letters were mailed April 24, 2025. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90VC.
SERVICE BRAKES, HYDRAULIC:FLUID · 23V601000
2023-08-25
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.
Consequence: Incorrect brake fluid can reduce braking ability and increase the risk of a crash.
Remedy: Dealers will inspect the brake fluid reservoir cap and, if necessary, replace it, free of charge. Owner notification letters are expected to be mailed October 17, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 47T9.
ELECTRICAL SYSTEM · 22V861000
2022-11-21
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.
Consequence: A gateway control module shutdown will suddenly reduce engine power, increasing the risk of a crash.
Remedy: Dealers will install a protective cover, free of charge. Owner notification letters are expected to be mailed January 20, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 90V2.
BACK OVER PREVENTION:DISPLAY FUNCTION · 22V742000
2022-10-05
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."
Consequence: A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
Remedy: Dealers will update the infotainment unit software, free of charge. Owner notification letters were mailed October 25, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Volkswagen's number for this recall is 91DZ.
ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT · 22V155000
2022-03-14
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.
Consequence: An inaccurate fuel reading may cause an engine stall due to lack of fuel, increasing the risk of a crash.
Remedy: Dealers will install a new sensor in the tank, free of charge. Owner notification letters were mailed February 17, 2023. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 20DN.
TIRES · 22V034000
2022-01-26
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.
Consequence: Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
Remedy: Dealers will inspect the rear axle, adjust the alignment as necessary, and replace any prematurely or unevenly worn tires, free of charge. Owner notification letters were mailed March 3, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L5.
SEAT BELTS:REAR/OTHER:RETRACTOR · 21V606000
2021-08-05
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."
Consequence: An unsecured child restraint system can increase the risk of injury during a crash.
Remedy: Dealers will inspect, and replace as necessary, the middle-rear seat belt assemblies, free of charge. Owner notification letters were mailed August 27, 2021. Owners may contact Volkswagen customer service at 1-800-893-5298 and Audi customer service at 1-800-253-2834. Volkswagen's numbers for this recall are 69CR (VW) and 69CS (Audi).
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.
Consequence: A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
Remedy: Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L1.
AIR BAGS · 21V159000
2021-03-10
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.
Consequence: An incorrectly manufactured air bag may not deploy properly, and could also eject plastic debris into the passenger compartment, increasing the risk of injury during a crash.
Remedy: Audi will notify owners, and dealers will inspect the passenger air bag score line, and repair it as necessary, free of charge. The recall begin March 26, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 70i2.
ELECTRICAL SYSTEM · 20V749000
2020-12-02
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.
Consequence: A detached connector can delay the activation of the restraint systems, including the side air bag, curtain air bag and/or seat-belt pretensioners during a side impact crash, increasing the risk of injury.
Remedy: Audi will notify owners, and dealers will inspect, and as necessary, replace the crash sensors in both front doors, free of charge. The recall began December 23, 2020. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 69BM.
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