The 2021 RS6 Avant is a phenomenal performer powered by Audi's 4.0L twin-turbo V8, but early examples are showing catastrophic engine failures tied to piston ring/bore wear and oil consumption issues—serious enough that owners are facing complete rebuilds or short block replacements well before 60,000 miles.
Symptoms: Excessive oil consumption (1+ quart per 1,000 miles), Misfires, rough idle, cylinder-specific fault codes, White/blue smoke from exhaust on cold starts, Metallic knocking or rattling from engine bay, Complete loss of compression in one or more cylinders
Fix: Full engine-out rebuild or short block replacement required. You're looking at 40-60 hours labor to drop the drivetrain, replace pistons, rings, hone cylinders or install Audi-supplied short block. Some cases covered under warranty extension, but out-of-pocket failures are financially devastating.
Estimated cost: $25,000-45,000
Transmission Oil Cooler Leaks
Common · medium severity
Typical onset: 40,000-70,000 mi
Symptoms: Transmission fluid puddles under vehicle, Low transmission fluid warning on dash, Erratic shifting or delayed engagement, Overheating transmission temperature readings
Fix: External cooler lines or cooler itself develop leaks at crimped fittings. Requires transmission pan drop, cooler replacement, and full fluid/filter service. 6-8 hours labor depending on access.
Estimated cost: $1,800-3,200
Transmission Mount Failure
Occasional · medium severity
Typical onset: 50,000-80,000 mi
Symptoms: Excessive clunking during aggressive launches or shifts, Vibration through chassis at idle in Drive, Visible drivetrain sag or misalignment, Harsh engagement into gear from Park
Fix: Rear transmission mount (dogbone) tears or separates due to high torque loads. Requires lift access and subframe support. 3-4 hours labor, OEM mount recommended over aftermarket.
Estimated cost: $800-1,400
Fuel System High-Pressure Pump and Filter Issues
Occasional · medium severity
Typical onset: 60,000-90,000 mi
Symptoms: Fuel system pressure fault codes (P0087, P228D), Hesitation or stumble under wide-open throttle, Limp mode activation during hard acceleration, Hard start or extended crank times
Fix: High-pressure fuel pump on these direct-injection V8s can fail early, especially with low-quality fuel. Filter is integral to the pump assembly in the tank. Tank drop required. 8-10 hours labor.
Estimated cost: $2,500-4,000
Rear Axle/Differential Mounting Point Cracks
Rare · high severity
Symptoms: Clunking from rear during launch or braking, Visible cracks in subframe near differential mounts (inspection required), Handling instability or rear-end wandering, NHTSA recall issued for some VINs
Fix: Stress cracks develop at rear axle carrier mounting points on subframe under high-load use. Recall covers inspection and reinforcement welding or subframe replacement. If caught post-warranty and non-recall VIN, you're looking at subframe R&R. 12-16 hours labor.
Estimated cost: $3,500-6,500
Brake Fluid Contamination and Servo Issues
Occasional · medium severity
Symptoms: Brake warning light with fault codes for hydraulic unit, Soft or spongy brake pedal feel, Extended stopping distances, ABS/ESC intervention failures or false activations
Fix: Moisture contamination or internal servo seal failures in brake booster/master cylinder assembly. Requires complete flush, sometimes ABS module replacement or booster rebuild. NHTSA recall issued for some production runs. 4-6 hours labor if not recall-covered.
Estimated cost: $1,500-3,000
Owner tips
Check oil level every 500 miles religiously—early oil consumption is your canary in the coal mine for piston/ring failures
Insist on full service records showing transmission fluid changes every 40k miles despite Audi's 'lifetime fill' claim
Have a pre-purchase inspection include a bore-scope inspection of cylinders and compression/leak-down test—non-negotiable
Run only Top Tier fuel and consider fuel system cleaner every 10k miles to protect high-pressure injectors and pump
Budget $3,000-5,000/year for maintenance and reserve another $10k for the inevitable major repair
Absolute weapon when it works, but the engine failure lottery and eye-watering repair costs make this a 'warranty-only' or 'lease-only' proposition unless you have deep pockets and a masochistic streak—I'd wait for the issues to shake out on later model years.
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.
Fitment notes: AGM battery required; located under cargo floor in trunk; start-stop system equipped
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Every control module on the 2020-2026 Audi RS6 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Heated/ventilated/massage seats; memory positions lost on replacement; separate modules per seat
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
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).
ENGINE · 21V339000
2021-05-12
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi SQ7, RSQ8, RS7, RS6 AVANT, and SQ8 vehicles. Cracks may develop on the surface of the engine cylinder bore.
Consequence: Cracks may cause engine damage and a stall or an oil leak, increasing the risk of a crash or fire.
Remedy: Dealers will replace the engine, free of charge. Owner notification letters were mailed July 9, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 10G9.
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.
Performance
Horsepower
591hp
Torque
590lb-ft
0–60 mph
3.5sec
Quarter mile
11.7sec
Top speed
190mph
Fuel economy (EPA)
City
15mpg
Highway
22mpg
Combined
17mpg
Fuel
Premium Gasoline
Capability & size
Curb weight
4,575lb
Seating
5seats
EPA class
Midsize Station Wagons
Wiper blades
C8 generation Avant wagon has rear wiper; if sedan variant exists it would not
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2021 Audi RS6 4.0L Twin-Turbo V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.