2020 Audi S4 Reliability ReportCommon Problems, Repair Costs & Expert Verdict
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Quick Facts · 2020 Audi S4
- Has 3 NHTSA recalls on record — the most notable involves the tires.
- Scores 10 points below the strongest nearby year — the 2022 Audi S4 earns a 88.
- The system most likely to surface first: engine (pcv/thermostat) (moderate severity).
The 2020 Audi S4 at a glance
- Is the 2020 Audi S4 reliable?
- Autojunket rates the 2020 Audi S4 78/100 (grade C+), categorized as moderate risk. A thrilling luxury sport sedan that demands proactive maintenance and a healthy repair budget to truly enjoy long-term.
- Should I buy a used 2020 Audi S4?
- Autojunket recommends reading the full reliability report before buying a 2020 Audi S4. The 2020 Audi S4 is an incredibly compelling luxury sport sedan offering a fantastic driving experience. However, its sophisticated engineering comes with a financial commitment for maintenance and potential repairs that the casual owner might not anticipate. If you understand these costs and commit to diligent care…
- Which Audi S4 years are the most reliable?
- Best model years to buy: 2018-2020 (first few years of the B9 generation saw fewer issues than later, more complex iterations). Years to avoid: None explicitly, but pre-2018 B8/8.5 S4s had more widespread supercharger and carbon buildup issues. The 2020 is a good choice within the B9 generation..
- What are the most common problems with the 2020 Audi S4?
- The top failure points on the 2020 Audi S4 are Engine (PCV/Thermostat) (typically around 60,000-100,000 miles), Electrical/Infotainment (typically around 40,000-80,000 miles), Adaptive Suspension (if equipped) (typically around 70,000-110,000 miles). Autojunket's full report includes repair-cost ranges and inspection checklists for each.
- At what mileage do problems start on the 2020 Audi S4?
- The first major mileage danger zone for the 2020 Audi S4 is around 30,000. Low Risk Zone — At this mileage, most vehicles are still under original warranty. Focus on routine oil changes, tire rotations, and cabin air filter replacements. Minor electrical gremlins are most likely issues.
Every answer is generated from real repair, recall, and ownership data — full breakdown in the report.
Read the full free reportShould You Buy the 2020 Audi S4?
The 2020 Audi S4 offers exhilarating performance and premium luxury, but it comes with the typical higher maintenance costs and potential for complex electronic issues inherent in performance-oriented German luxury vehicles. While mechanically sound with proper care, neglecting its specific needs can quickly lead to significant repair bills, pushing it into a 'proceed with caution' territory for the average buyer.
The 2020 Audi S4 is an incredibly compelling luxury sport sedan offering a fantastic driving experience. However, its sophisticated engineering comes with a financial commitment for maintenance and potential repairs that the casual owner might not anticipate. If you understand these costs and commit to diligent care…
Best Model Years
2018-2020 (first few years of the B9 generation saw fewer issues than later, more complex iterations)
Years to Avoid
None explicitly, but pre-2018 B8/8.5 S4s had more widespread supercharger and carbon buildup issues. The 2020 is a good choice within the B9 generation.
Biggest Strengths
- Robust 3.0T V6 engine (with proper maintenance)
- Excellent build quality and luxurious interior finishes
- Reliable Quattro AWD system for all-weather performance
Top Risk Areas
The systems that tend to fail first on the 2020 Audi S4, 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.
The 3.0T V6 (EA839) can suffer from PCV valve failures leading to excessive oil consumption or boost issues, and plastic thermostat housings can develop leaks as they age. Both require moderate labor and specific parts.
Intermittent MMI glitches, sensor failures (e.g., parking sensors, blind-spot monitoring), or module communication errors are not uncommon. While often minor, diagnosis and repair can be costly due to system complexity.
Vehicles equipped with the optional S Sport Package (adaptive dampers) may experience premature wear or leaks in the electronically controlled shocks. Replacement is significantly more expensive than standard passive dampers.
2020 Audi S4 Mileage Danger Zones
The mileage windows when the 2020 Audi S4 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, most vehicles are still under original warranty. Focus on routine oil changes, tire rotations, and cabin air filter replacements. Minor electrical gremlins are most likely issues.
Maintenance Zone
This mileage often marks the expiration of the original warranty. Be prepared for major service (spark plugs, transmission fluid change, brake fluid) and potential for PCV valve or thermostat issues to begin emerging. Performance consuma…
Elevated Risk Zone
Beyond 90k miles, wear and tear on suspension components (bushings, control arms) and potential for carbon buildup becomes more prevalent. Adaptive dampers, if equipped, may also start to show issues. A comprehensive inspection is critical.
High Risk Zone
At this point, you're looking at potential major component failures like turbocharger wear (though rare on EA839), engine mounts, and more widespread electrical issues. Factor in the cost of a full engine and transmission service, and be…
2020 Audi S4 Ownership Cost Outlook
What it typically costs to keep the 2020 Audi S4 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$800-1,200 (including routine service and minor consumables)
Moderate Repairs
$1,000-3,000 occasionally (e.g., PCV, thermostat, suspension work)
How Long Does the 2020 Audi S4 Last?
Ideal candidates are those with under 60,000 miles, preferably with an active Audi CPO warranty. If considering over 80,000 miles, ensure a comprehensive inspection and budget heavily for impending maintenance and potential repairs.
What 2020 Audi S4 Owners Actually Say
What Owners Love
- Blistering acceleration and confident handling in all conditions.
- Exquisite interior craftsmanship, high-quality materials, and advanced technology.
- Standard Quattro AWD provides superior grip and safety.
- Understated styling allows for a sleeper performance appeal.
Common Frustrations
- Higher-than-average maintenance and repair costs, especially at the dealership.
- Potential for frustrating MMI glitches or minor electronic quirks.
- Fuel economy, while respectable for its power, demands premium fuel.
- Firm ride can be too stiff for some, especially with larger wheels.
Who Should Buy the 2020 Audi S4?
Best For
- Enthusiasts seeking a luxurious, high-performance daily driver.
- Buyers prioritizing all-weather capability with a sporty edge.
- Individuals who understand and can afford higher European luxury car maintenance costs.
Not Ideal For
- Budget-conscious buyers seeking minimal ownership costs.
- Individuals unwilling to commit to specialized maintenance schedules.
How the 2020 Audi S4 Compares to Rivals
The S4 stands strong against its direct German rivals in terms of performance and luxury, often with slightly better all-weather usability thanks to standard Quattro. However, it can't match the long-term low cost of ownership or bulletproof reliability of Japanese luxury or m…
More Reliable Than
- Mercedes-AMG C43 (often higher repair costs and more complex electrical issues)
- Infiniti Q50 Red Sport (lower interior quality, less refined driving dynamics)
- Alfa Romeo Giulia Quadrifoglio (significantly higher long-term reliability risk, more niche support)
Comparable To
- BMW M340i (similar performance, build quality, and cost of ownership)
- Genesis G70 3.3T (excellent value, but newer to market, long-term parts availability/cost still developing)
NHTSA Recalls
3 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
TIRES
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.
SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY
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.
What breaks on the 2020 Audi S4?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Audi S4 by Year
Compare AutoScores across nearby years of the Audi S4. Click any year for its full report.
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Similar class, similar year range — ranked by AutoScore.
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Where the 2020 Audi S4 report beats Carfax + CR
Carfax tells you if it crashed. Consumer Reports rates the whole nameplate. Autojunket tells you what will actually break on this specific year — and how to negotiate it.
Year-specific reliability score
Common problems + repair costs
Mileage danger zone map
AI negotiation script + walk-away price
Single report price
Frequently Asked Questions
Sell your 2020 Audi S4 for what it's actually worth.
Log every service on your Audi S4. When it's time to sell, hand the buyer a signed PDF — every receipt, mileage-verified, close the deal at your price.
- OSC Transfer PDF — every receipt
- Snap-a-receipt AI log
- Fuel & mileage tracker
- Shareable buyer view link
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