The 2020 S8 with the 4.0L twin-turbo V8 is a technological marvel that can turn into a financial nightmare. The EA824 engine has critical oil consumption and catastrophic failure issues that can strike without warning, while the 8-speed ZF transmission and supporting systems add layers of expensive complexity.
Symptoms: Excessive oil consumption (1 qt per 1,000 mi or worse), Blue smoke on cold start or acceleration, Loss of power under load, Check engine light with misfire codes, Metallic knocking from engine bay
Fix: The EA824 V8 suffers from piston ring flutter and cylinder wall scoring, leading to total engine failure. Fix requires complete engine rebuild (60-80 hrs) or short block replacement (50-70 hrs). Many engines fail before 60k miles. Audi extended warranty to 10yr/120k on some VINs but verify coverage before purchase.
Estimated cost: $25,000-45,000
Transmission Oil Cooler Failure
Common · high severity
Typical onset: 50,000-90,000 mi
Symptoms: Transmission slipping or harsh shifting, Limp mode activation, Transmission overheating warnings, Coolant and transmission fluid mixing (milky fluid), Loss of drive
Fix: The ZF 8HP transmission oil cooler develops internal leaks allowing coolant into transmission fluid. Requires cooler replacement (8-12 hrs) plus full transmission flush and often valve body replacement if contamination occurred. Cannot ignore—will destroy transmission if driven.
Estimated cost: $3,500-7,500
Rear Axle Carrier Bushing Failure
Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunking from rear on acceleration or deceleration, Vibration under hard acceleration, Wandering rear end feel, Abnormal tire wear on rear, Subject to NHTSA recall for rear axle assembly
Fix: Rear differential mounts and axle carrier bushings wear prematurely on cars driven aggressively. Requires subframe drop and bushing replacement (12-16 hrs). Check for active recall on your VIN—Audi may cover under recall campaign.
Estimated cost: $2,800-4,500
ECU/ECM Software Failures and Updates
Common · medium severity
Symptoms: Random check engine lights, Limp mode with no apparent cause, Rough idle or stalling, Turbo boost issues, Start/stop system malfunction, Subject to NHTSA recall for ECU
Fix: The engine control module has multiple software bugs causing phantom issues and actual drivability problems. Often requires dealer-level software flashing (2-3 hrs) and may need ECU replacement if hardware failed. Check for open recalls—some ECU issues covered under extended warranty or recall.
Estimated cost: $800-3,500
Air Suspension Compressor and Strut Failures
Occasional · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Vehicle sagging on one corner overnight, Compressor running excessively, Air suspension fault warnings, Harsh ride quality, Inability to raise vehicle
Fix: Air suspension compressor and individual struts fail with age and mileage. Compressor replacement runs 4-6 hrs, single strut 3-4 hrs each. All four corners failing within short timeframe is common once system starts deteriorating. Aftermarket conversions to coils exist but compromise ride.
Estimated cost: $2,000-8,000
Backup Camera and Sensor System Failures
Common · low severity
Symptoms: Backup camera black screen or distorted image, Parking sensors giving false warnings, Camera washer system inoperative, Subject to NHTSA recall for backup camera
Fix: Backup camera module and rear sensors fail frequently due to moisture intrusion and wiring issues. Camera replacement requires bumper removal (3-4 hrs). Check for open camera recall on your VIN. Not a safety-critical failure but annoying on a $130k car.
Estimated cost: $1,200-2,500
Owner tips
Check oil level every 500 miles religiously—consumption is early warning of engine death. Document everything for potential warranty claims.
Get pre-purchase inspection focusing on engine compression test, leak-down test, and borescope inspection of cylinders. Walk away from high oil consumption.
Verify all recalls completed and ask about Audi Goodwill Case history—engines failing early sometimes get partial coverage.
Budget $5,000/year minimum for maintenance and repairs beyond warranty. These are $15k/year operating cost cars.
Extended warranty is mandatory if buying used—but read fine print on engine coverage exclusions for oil consumption.
Absolutely not without factory warranty coverage and documented proof of no oil consumption issues—the engine time bomb risk alone makes this a terrible used buy for most shoppers.
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.
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.
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.
ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM) · 21V111000
2021-02-24
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A8 and 2020-2021 Audi S8 vehicles. A missing sealing pin may allow moisture to enter the engine control module connector, possibly causing a control module malfunction.
Consequence: An engine control module malfunction may cause the engine to stall, increasing the risk of a crash.
Remedy: Audi will notify owners, and dealers will inspect the engine control module connector for a missing sealing pin, and install it, if necessary. The connector will also be inspected for corrosion, and replaced as necessary. Repairs will be performed free of charge. The recall began March 12, 20121. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 97EV.
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