The 2021 Audi A8 is part of the D5 generation that debuted in 2018, featuring advanced tech and luxurious engineering — but the 4.0L twin-turbo V8 models have suffered catastrophic early-life engine failures tied to piston ring and bearing issues, while both engines face transmission cooler leaks and electrical gremlins typical of late-model VAG flagships.
Catastrophic V8 Engine Failure (4.0T TFSI)
Occasional · high severity
Typical onset: 20,000-60,000 mi
Symptoms: Excessive oil consumption (>1 qt per 1,000 mi), Blue smoke on startup or acceleration, Metallic knocking or rattling from engine bay, Low oil pressure warnings despite recent fill-up, Catastrophic rod knock leading to sudden engine seizure
Fix: Piston ring land failure and rod bearing wear — requires complete engine rebuild or replacement. Audi has extended warranty coverage on some VINs, but out-of-warranty cases face full long-block replacement. Expect 40-60 hours labor for R&R plus internal work if rebuilding in-house, or straight swap if getting reman unit. This is the platform's biggest nightmare.
Estimated cost: $18,000-35,000
Transmission Oil Cooler Leak
Common · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: Transmission fluid dripping under vehicle, often near front subframe, Low transmission fluid warnings on dash, Harsh or delayed shifts when fluid level drops, Pink or red fluid visible on garage floor
Fix: The ZF 8-speed's external oil cooler develops leaks at line connections or cooler core itself. Cooler replacement involves dropping front subframe on some A8 variants for access. 6-9 hours labor depending on access, plus fluid and cooler assembly.
Estimated cost: $1,800-3,200
Rear Camera and Sensor Failures
Common · low severity
Symptoms: Black screen or 'camera unavailable' message when shifting to reverse, Parking sensors giving false warnings or no warnings at all, Intermittent camera operation, especially in cold or wet conditions, NHTSA recalls issued for camera system malfunctions
Fix: Camera modules fail due to moisture intrusion or connector corrosion in trunk lid. Sensor modules also fail intermittently. Camera replacement is 2-3 hours including calibration and coding. Sensors run 1-2 hours each if multiples need replacement.
Estimated cost: $800-1,800
MMI Infotainment Screen Freezing and Glitches
Common · low severity
Symptoms: Touchscreen unresponsive or laggy, requiring hard reboot, Climate control or drive mode selection inaccessible, Navigation system crashing or freezing mid-route, Apple CarPlay or Android Auto connection failures, NHTSA recall for infotainment unit software
Fix: Most cases resolve with software updates via dealer ODIS system, but hardware failures require complete MMI control unit replacement and coding. Software update is 1-2 hours; hardware swap is 4-6 hours due to dash disassembly.
Estimated cost: $300-4,500
Rear Axle Bushing Wear and Subframe Shifting
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Clunking over bumps from rear suspension, Steering wheel off-center after alignment that won't hold, Unusual tire wear patterns on rear tires, Vague or wandering steering feel at highway speeds, NHTSA recall for rear axle assembly issues
Fix: Rear subframe bushings deteriorate prematurely, allowing axle to shift. Requires subframe drop, bushing replacement, and four-wheel alignment. Some cases need full rear axle assembly per recall. 8-12 hours labor for bushing job.
Estimated cost: $2,200-4,000
48V Mild-Hybrid System Faults (Belt-Starter Generator)
Occasional · medium severity
Typical onset: 30,000-70,000 mi
Symptoms: Check engine light with codes for 48V system malfunction, Auto start-stop feature stops working, Reduced power or limp mode warnings, Battery discharge warnings despite new 12V battery, Squealing or grinding noise from front of engine bay
Fix: The belt-driven starter-generator (BSG) in the 48V mild-hybrid system can fail — bearings seize or electronics fry. Replacement requires serpentine belt removal, generator swap, and system recalibration. 5-7 hours labor plus expensive OE-only generator unit.
Estimated cost: $3,500-6,000
Rear Seat Belt Retractor Failure
Rare · medium severity
Symptoms: Rear seat belt won't retract fully or at all, Seat belt warning light stays on with passengers buckled, Belt feels loose or doesn't lock during sudden stops, NHTSA recall for rear seat belt retractors
Fix: Retractor mechanism fails internally — covered under recall. Dealer replacement takes 2-3 hours per side due to trim removal and pretensioner handling. Should be no-cost under recall.
Estimated cost: $0 (recall)
Owner tips
If shopping for a used 4.0T V8 model, demand oil consumption test records and inspect for any signs of engine work — walk away if consumption exceeds 1 qt per 2,000 mi.
Check for open recalls via VIN lookup before purchase — rear axle, cameras, seat belts, and infotainment all have active campaigns.
Budget $300-500/year for software updates and module coding at dealer; independent VAG specialists with ODIS can save you 50%.
Inspect transmission cooler area and subframe for leaks during PPI — catching cooler leak early avoids transmission damage.
Extended warranty is almost mandatory on these — catastrophic V8 failure alone justifies the cost if you're buying a 4.0T.
Skip the V8 unless it has documented engine replacement under warranty; the 3.0T V6 is far more reliable but still demands deep pockets for electrical and hybrid system repairs — buy only with comprehensive warranty or prepare for $5K+ annual repair budgets.
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.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2022-2024 RS e-tron GT, e-tron GT, Q4 e-tron Sportback, Q4 e-tron, 2020-2021 Audi A8, 2019-2024 e-tron Quattro, 2020-2024 e-tron Sportback Quattro, Q5, and 2021-2022 A7 vehicles. When using the industrial 220V/240V plug at the 100% charge setting, some home power outlets may be incapable of handling the electrical current required to utilize the compact charging system, causing the outlet or charging cable to overheat.
Consequence: An overheated outlet or charging cable can increase the risk of a fire.
Remedy: Owners are advised not to use the 220V/240V compact/portable charging cable and only use the 110V home charging cable or public charging stations. Dealers will supply a new 220V/240V compact/portable charging cable with an incorporated temperature sensor, free of charge. Owner notification letters were mailed on March 28, 2024. Owners may contact Audi customer service at 1-800-253-2834. Audi's numbers for this recall are 93U6 and 93U8.
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 AUDI A8, A6 Allroad, E-TRON Quattro, 2022 S3, RSQ8, RS7, RS6 Avant, Q8, Q7, Q3, E-TRON Sportback Quattro, S5 Cabriolet, E-TRON GT, S5 Sportback, A7, A6, A5 Sportback, A5 Cabriolet, A4, A4 Allroad, A3, S8, SQ7, SQ8, S6, and S4 vehicles. The infotainment main unit may become damaged internally when the vehicle is shut off, resulting in an inoperative rearview camera display the next time the vehicle is started. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Consequence: An inoperative rearview camera display reduces the driver's rear visibility, increasing the risk of a crash.
Remedy: Dealers will replace the infotainment main unit, free of charge. Owner notification letters were mailed June 6, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 91Ei.
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.
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.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA · 21V825000
2021-10-20
Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi A8 and S8, 2022 Audi A5 Sportback, A4 Sedan, E-Tron GT, Q3, Q5, RS6 Avant, A3 Sedan, S5 Sportback, Q5 Sportback, Q7, Q8, RSQ8, SQ7, SQ8, and S3 Sedan vehicles. A software error may prevent the rear-view image from initially displaying when the vehicle begins to reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Consequence: A rear-view camera that does not display an image reduces the driver's rear view, increasing the risk of a crash.
Remedy: Dealers will update the infotainment unit parameters, free of charge. Owner notification letters were mailed November 9, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 91CR.
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.
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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