2021 Audi A8 Reliability ReportKeepScore 85/100 · top failure points · buy or avoid
Quick Facts · 2021 Audi A8
- Scores 3 points below the strongest nearby year — the 2022 Audi A8 earns a 88.
- The system most likely to surface first: mmi infotainment & electrical glitches (minor severity).
- Has 10 NHTSA recalls on record — the most notable involves the back over prevention: sensing system: camera.
2021 Audi A8: Buy or Avoid?
The 2021 Audi A8 stands as a highly dependable full-size luxury sedan, particularly for its class, offering robust engineering and a refined driving experience. While its intricate technology can occasionally present minor electronic quirks, major mechanical failures are notably infrequent for a vehicle of this complexity. This A8 is a smart acquisition for discerning buyers prioritizing comfort and sophistication without accepting excessive reliability trade-offs.
The 2021 Audi A8 represents a compelling and reliable choice for a full-size luxury sedan. Its robust engineering, sophisticated ride, and cutting-edge technology make it a joy to own. While the complexity demands diligent maintenance and a budget for potential high-cost component repairs if not under warranty, the…
Best Model Years
2020-2024 (D5 Generation, with continuous software refinements)
Years to Avoid
None within the 2021 model year itself. Earlier D5 models (2019) had more initial software kinks. Avoid significantly older generations if seeking modern reliability.
Biggest Strengths
- Exceptional build quality and premium materials
- Robust engine and transmission options (3.0T V6 & ZF 8-speed)
- Advanced safety features and driver assistance systems
2021 Audi A8 — Known Trouble Spots
The systems that tend to fail first on the 2021 Audi A8, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
Owners occasionally report the dual-screen MMI system freezing, lagging, or requiring reboots. This is typically software-related but can be frustrating. Minor sensor errors for ADAS features (e.g., blind spot monitor, parking assist) ar…
While generally durable, the complex adaptive air suspension system can develop issues over time, such as ride height sensor failures, compressor issues, or slow leaks in air springs. On a 2021 model, these are less common but not unhear…
The 2021 A8 utilizes a 48V mild-hybrid system. While more reliable than earlier iterations, issues with the belt-alternator-starter (BAS) unit or DC/DC converter can occur. These components are critical for vehicle operation and can be e…
2021 Audi A8 Mileage Danger Zones
The mileage windows when the 2021 Audi A8 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the car is still very new. Most issues will be minor software glitches, MMI annoyances, or early wear on brake pads/tires from spirited driving. Most components are well within their expected lifespan.
Maintenance Zone
This mileage often marks the expiration of the original warranty for some components. Expect to start addressing more significant scheduled maintenance items, and potentially the first signs of wear on more complex systems like air suspe…
Elevated Risk Zone
Beyond 90,000 miles, the probability of encountering wear-related issues with more expensive components significantly increases. Air suspension, turbochargers (especially on 4.0T), control arm bushings, and 48V system components are all…
High Risk Zone
At this mileage, the A8 will require significant investment to maintain its peak performance and reliability. Major component failures become more likely, and repairs can easily exceed the vehicle's depreciated value. This is typically w…
2021 Audi A8 Ownership Cost Outlook
What it typically costs to keep the 2021 Audi A8 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$800-1,500 (dealer) or $500-1,000 (independent specialist)
Moderate Repairs
$1,000-3,000 occasionally (e.g., air suspension component, control arms)
How Long Does the 2021 Audi A8 Last?
A well-maintained 2021 Audi A8 can confidently reach 150,000-200,000 miles, but expect increasing maintenance and component replacement costs beyond 90,000 miles, particularly for suspension and mild-hybrid systems.
What 2021 Audi A8 Owners Actually Say
What Owners Love
- Outstanding ride comfort and quietness, making long journeys effortless.
- Impeccable interior quality with exquisite materials and ergonomic design.
- Powerful and smooth powertrains, particularly the 4.0T V8, with excellent AWD traction.
- Advanced technology that is intuitive once learned, enhancing safety and convenience.
Common Frustrations
- MMI infotainment system can occasionally be glitchy, requiring restarts or updates.
- High cost of ownership, including premium fuel, expensive parts, and specialized labor.
- Complex systems like air suspension or 48V mild-hybrid can lead to significant repair bills out of warranty.
- Rear visibility can be somewhat limited, relying heavily on cameras and sensors.
Who Should Buy the 2021 Audi A8?
Best For
- Executives or professionals seeking a discreet yet luxurious daily driver
- Buyers prioritizing ultimate ride comfort and a quiet cabin for long distances
- Technophiles who appreciate sophisticated infotainment and driver assistance features
Not Ideal For
- Budget-conscious buyers looking for low running costs
- Those who prefer a more engaging, sports-sedan driving experience
How the 2021 Audi A8 Compares to Rivals
The 2021 A8 offers a very competitive blend of luxury and reliability within the full-size European luxury segment. While it can't quite match the bulletproof nature of a Lexus LS for sheer simplicity and low repair cost, it generally holds its own against or slightly surpasse…
More Reliable Than
- BMW 7 Series (G11/G12 generation, especially early models, concerning certain engine/electrical issues)
- Maserati Quattroporte (generally lower long-term reliability)
- Mercedes-Benz S-Class (W222 generation, comparable but Audi can have fewer *major* non-engine issues)
Comparable To
- Mercedes-Benz S-Class (W223 generation, newer, similar complexity/reliability profile)
Safety Recalls on the 2021 Audi A8
10 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
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."
SEAT BELTS:REAR/OTHER:RETRACTOR
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."
What breaks on the 2021 Audi A8?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Audi A8 — Year-by-Year Comparison
Compare KeepScores across nearby years of the Audi A8. Click any year for its full report.
Competing 2021s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2021 Audi A8
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Frequently Asked Questions
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