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Audi S8
Sedan · Gas · 9 versions · owner report
Ranked #5 of 8 luxury full-size cars on owner data, price and fuel economy
Every generation
Power
0–62 mph (0–100 km/h)
Top speed (305 km/h)
Combined, EPA 2027
What owners say
Our take, from owner reports
Owner sentiment is strongly positive regarding the vehicle's core proposition as a high-performance luxury sedan, described as a "sleeper rocket with insane comfort" and "the best balance of comfort and performance possible." The twin-turbo 4.0L V8 (EA825) engine and ZF 8-speed automatic transmission are very frequently praised for their robust performance, smooth power delivery, and proven long-term reliability when properly maintained, with multiple reports of trouble-free operation beyond 100,000 miles, even on tuned vehicles.
6 problems reported (2 very frequent, 2 recurrent, 2 isolated) · high confidence
Problems owners report
- Very frequentExtremely high maintenance and repair costs
Routine service, tires, and brakes are very expensive; major repairs (turbos, transmission, engine mounts) can cost $5,000-$15,000+.
- Very frequentTurbocharger failure due to oil screen blockage
A known defect in the D4 generation 4.0T engine where a restrictive oil screen can starve the turbos of oil, leading to catastrophic failure. Subject to a recall/service action (TSB 2044640).
- RecurrentFaulty Belt Starter Generator (BSG)
Affects D5 generation models (and other Audis) as part of "Emissions Service Action 27BQ"; the unit can fail without warning around 40,000 miles. Replacement is covered by recall.
+ 3 more issuesShow fewer
- RecurrentAir suspension reliability concerns
Noted as a potential high-cost failure point as the vehicle ages, with repairs described as "horrendous.".
- IsolatedEarly rocker arm issues (EA825 engine)
Affected some early D5 generation engines; revised parts were implemented in late 2018.
- IsolatedInterior material wear
Specific mention of a "bubbling dash" being a very expensive ($10,000 USD) repair considered "normal wear and tear" by the manufacturer.
The version owners recommend
Insufficient owner data available to declare a specific model year or trim (e.g., S8 Plus) as a definitive "best version." However, there is a strong, recurrent emphasis on seeking out vehicles where the critical turbocharger oil screen recall/service action (TSB 2044640) has been completed. For the D5 generation (post-2019), units produced after late 2018 are noted to have revised engine components (rocker arms) that resolved early issues, and all models are subject to a recall for the faulty Continental BSG (Belt Starter Generator) unit, which should be verified as completed.
Competitors to consider
Owners compare it most often with the Mercedes-Benz S-Class (and AMG variants), BMW 7 Series/M5, Porsche Panamera, Audi RS7 and Lexus LS.
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Overall sentiment
Owner sentiment is strongly positive regarding the vehicle's core proposition as a high-performance luxury sedan, described as a "sleeper rocket with insane comfort" and "the best balance of comfort and performance possible." The twin-turbo 4.0L V8 (EA825) engine and ZF 8-speed automatic transmission are very frequently praised for their robust performance, smooth power delivery, and proven long-term reliability when properly maintained, with multiple reports of trouble-free operation beyond 100,000 miles, even on tuned vehicles. The interior build quality, quietness (especially with the optional dual-pane glass), and air suspension are also highlighted as exceptional. However, this enthusiasm is universally tempered by a very frequent and emphatic warning about extremely high ownership costs. The consensus is that the S8 delivers an unparalleled driving experience but requires a significant and predictable budget for maintenance and potential repairs, which can escalate into five-figure sums for major component failures.
Positioning vs competitors
Positioned as a more understated and technologically advanced alternative to the Mercedes S-Class, offering comparable luxury with superior performance credentials from its twin-turbo V8. It is frequently compared to the Audi RS7, sharing the same drivetrain but offering a more spacious, traditional sedan body style versus the sportback. Compared to rivals like the BMW M5, it is seen as more comfort-oriented and refined, though less engaging for spirited driving. The vehicle is noted for its significant value proposition on the used market, offering performance and luxury that rivals or exceeds newer, more expensive competitors at a heavily depreciated price, though with the caveat of higher running costs.
Recommended configurations
The 4.0L twin-turbo V8 engine is considered the essential and desirable powertrain. The optional dual-pane glass is very highly recommended for its dramatic noise insulation. An extended third-party warranty is strongly advised by multiple owners due to the cost of potential repairs. A thorough pre-purchase inspection, with a specific focus on verifying completion of the turbo oil screen recall and a full service history, is considered mandatory. Owners recommend more frequent synthetic oil changes (every 5,000-7,000 miles) than the factory interval. High-performance tires (e.g., Michelin Pilot Sport AS4) are noted as a necessary but expensive recurring cost.
General recommendations
Highly recommended for experienced enthusiasts who understand and can budget for the costs of flagship German performance luxury ownership. It is an ideal choice for those seeking a supremely comfortable, exceptionally fast, and refined grand tourer or daily driver. It is strongly advised to purchase only with a complete and meticulous service history. Budget a minimum of $2,000-$3,000 USD annually for routine maintenance and wear items (tires, brakes), with significant reserves for unexpected repairs. A pre-purchase inspection by a specialist or Audi dealer is non-negotiable. Avoid vehicles with modifications or incomplete history. Consider the vehicle an excellent value on the used market only if the high cost of upkeep is factored into the total cost of ownership.
Remarks
The turbo oil screen issue is the most significant and widely discussed mechanical fault for the D4 S8. Owners report that Audi issued a recall and provided reimbursement for some owners who had previously paid for repairs. The resolution involved multiple revised screen designs or aftermarket relocation/delete kits. The drivetrain (EA825 4.0T V8 and ZF 8HP transmission) is otherwise regarded as remarkably strong and reliable, shared across high-performance Audi, Bentley, and Lamborghini models. The dichotomy of the ownership experience is stark: immense satisfaction with the vehicle's capabilities contrasted with the financial reality of maintaining a complex, high-performance flagship sedan. Analysis based on approximately 35 substantive owner discussions spanning D4 and D5 generations.
Generation by generation
Owner insights per generation and US complaint/recall records (NHTSA).
Complaints and recalls by model yearNo year grades F. Best year: 2009Source: NHTSA (US)Show table
Each year graded against the model's other years: Year Score.
| Year | Complaints | Recalls | Most-reported area |
|---|---|---|---|
| 2021 | 1 | 8 | power train |
| 2016 | 6 | 3 | service brakes |
| 2015 | 6 | 4 | engine |
| 2014 | 6 | 5 | engine and engine cooling |
| 2013 | 13 | 5 | engine |
| 2009 | 2 | 1 | visibility/wiper |
| 2008 | 5 | 1 | visibility |
| 2007 | 3 | 1 | visibility |
Complaint counts come from owner reports filed with the US National Highway Traffic Safety Administration. Higher-selling years naturally accumulate more complaints.
Recall notices28 on record · Source: NHTSA (US)Show recalls
2021 · back over prevention: sensing system: cameracampaign 21V825000
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."
2021 · seat belts:rear/other:retractorcampaign 21V606000
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."
2021 · tirescampaign 22V034000
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.
2021 · engine and engine cooling:engine:engine control module (ecu/ecm)campaign 21V111000
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.
2021 · suspension:rear:axle:non-powered axle assemblycampaign 21V295000
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.
2021 · back over prevention:display functioncampaign 22V742000
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."
2021 · electrical system: instrument cluster/panelcampaign 25V201000
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.
2021 · back over prevention: sensing system: cameracampaign 25V900000
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."
2016 · fuel system, gasoline:delivery:hoses, lines/piping, and fittingscampaign 19V057000
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2016 Audi A8 and S8 vehicles. The fuel supply line for the high pressure fuel pump may become porous and leak fuel.
2016 · structure:body:hoodcampaign 20V397000
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2018 Audi S8 and A8 vehicles. The seal around the engine compartment may come loose and contact hot engine components.
2016 · engine and engine cooling:engine:gasoline:turbo/superchargercampaign 22V178000
Volkswagen Group of America, Inc. (Audi) is recalling certain 2013-2017 A8, S6 Sedan, S7, S8, and 2014-2017 RS7 vehicles. The turbocharger oil supply strainer can become blocked, causing wear to the bearings due to lack of lubrication.
2015 · fuel system, gasoline:delivery:hoses, lines/piping, and fittingscampaign 18V430000
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2015 Audi S8 and A8 vehicles. The fuel supply line for the high pressure fuel pump may become porous over time, resulting in a fuel leak.
2015 · fuel system, gasoline:delivery:hoses, lines/piping, and fittingscampaign 19V057000
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2016 Audi A8 and S8 vehicles. The fuel supply line for the high pressure fuel pump may become porous and leak fuel.
2015 · structure:body:hoodcampaign 20V397000
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2013-2018 Audi S8 and A8 vehicles. The seal around the engine compartment may come loose and contact hot engine components.
2015 · engine and engine cooling:engine:gasoline:turbo/superchargercampaign 22V178000
Volkswagen Group of America, Inc. (Audi) is recalling certain 2013-2017 A8, S6 Sedan, S7, S8, and 2014-2017 RS7 vehicles. The turbocharger oil supply strainer can become blocked, causing wear to the bearings due to lack of lubrication.
13 older recalls not shown. Check nhtsa.gov with your VIN for the full history.
Specifications
Enthusiast code: D5
4.0 TFSI V8 Mild Hybrid quattro
4.0L 8-cylinder · 571 hp · AWD · automatic
Built 2021–2026