2020 Audi S8 Problems: 4 Issues Every Owner Should Know

2020 model year · 823+ owner reports · Updated April 2026

According to Au7o's analysis of 823+ owner reports, the 2020 Audi S8 has 4 documented known issues, with 4 rated critical. The most serious are Adaptive Air Suspension Multi-Point Failure ($1,200-$4,500 repair), ZF 8-Speed Torque Converter and Valve Body Issues ($2,500-$6,000 repair), 4.0T Turbo Coolant System Degradation ($1,000-$3,500 repair) and Air Suspension Strut Leak and Compressor Failure ($1,500-$20,000 repair). The most commonly reported issue is Adaptive Air Suspension Multi-Point Failure with 292 owner reports. Across all issues, repair costs range from $1,000 to $20,000. DIY maintenance guides at au7o.io.

All 4 Known Issues

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When Issues Typically Appear

ZF 8-Speed Torque Converter and Valve Body Issues

40K-60K

4.0T Turbo Coolant System Degradation

48K-72K

Adaptive Air Suspension Multi-Point Failure

60K-100K

025K50K75K100K mi

Community Reported

292 owners

On the 2013-2024 Audi S8, the S8 full-size luxury sedan places extreme demands on the air suspension system. All four struts and the compressor commonly need replacement between 60,000-100,000 miles. The heavy curb weight accelerates bladder wear.

Common Symptoms

Vehicle sagging after parking
Suspension malfunction warning
Harsh ride quality
Compressor running excessively
Uneven ride height
Bottoming out over bumps

How to Fix

Replace air struts as they fail. Budget for full system refresh at 80,000 miles. Arnott aftermarket struts offer cost savings.

What Owners Are Using

Parts and tips from 292+ owners who fixed this issue

UpgradeRear Air Spring Assembly (Arnott #A-3200)
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Typical repair cost:$1,200 - $4,500

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Community Reported

High Confidence292 reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2013-2022 Audi S8, the Audi S8 (2013-2022) uses an adaptive air suspension system with electronically controlled air struts that are prone to failure. The air springs (bellows) develop leaks from rubber deterioration, UV exposure, and road debris damage. A leaking air spring causes the affected corner of the vehicle to sag while parked, and the air compressor works overtime to compensate. This overworks the compressor, causing premature compressor failure ($2,000-$2,100 to replace). Individual air struts cost $4,300-$4,600 each to replace at a dealer. The S8's heavier curb weight (4,800+ lbs) and sport-tuned suspension put more stress on air components than the standard A8. StrutMasters and RepairPal document air suspension as one of the most expensive recurring repairs on the D4/D5 S8 platform. Complete suspension rebuild (4 struts + compressor) can exceed $20,000 at dealer pricing.

This issue also affects: Audi A4 allroad, Audi A6 allroad, Mercedes-Benz E-Class

Common Symptoms

One corner of vehicle sags after sitting overnight
Vehicle sits noticeably lower on one side
Air compressor running constantly (audible buzzing/humming)
Hissing noise from wheel well area (air leak)
Suspension fault warning on dashboard
Ride quality becomes harsh or bouncy
Vehicle takes long time to reach ride height after starting

How to Fix

SINGLE STRUT LEAK: Replace air strut ($4,300-$4,600 per strut at dealer, $1,500-$2,500 with aftermarket Arnott or Continental strut). COMPRESSOR FAILURE: Replace air compressor ($2,000-$2,100 at dealer, $800-$1,200 aftermarket). COST SAVING: Aftermarket air struts from Arnott, Continental (OEM supplier), or Suncore offer 40-60% savings over dealer pricing. ULTIMATE SAVINGS: StrutMasters conversion kit replaces air struts with passive coilovers ($1,500-$2,500 for complete kit) but eliminates adaptive height adjustment. PREVENTION: Park in garage to reduce UV damage to rubber bellows. Regularly wash wheel well area to remove road salt and debris.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

UpgradeArnott remanufactured air struts offer significant savings over OEM ($1,200-$1,800 each vs $4,300+ dealer). Arnott provides a lifetime warranty on their remanufactured struts. (Arnott Remanufactured Air Strut (A8/S8 D4))
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TipIf one strut is leaking, the others are likely close behind. Budget for replacing all four struts within the next 12-24 months. Replacing in pairs (front or rear) is the minimum recommended approach.
NoteA leaking air strut will quickly kill your compressor as it runs continuously trying to maintain ride height. Address leaks promptly—a $1,500 strut replacement now prevents a $2,000 compressor failure later.

Typical repair cost:$1,500 - $20,000

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Community Reported

Medium Confidence0 reportsLast reported by owners Invalid DateReviewed Invalid Date

Community Reported

288 owners

On the 2013-2024 Audi S8, the S8 high-torque application stresses the ZF 8HP torque converter and valve body. Shudder, delayed shifts, and harsh engagement develop as the converter clutch wears and valve body solenoids degrade.

Common Symptoms

Torque converter shudder
Delayed gear engagement
Harsh 2-3 shift
Transmission fault codes
RPM flare on shifts
Vibration at highway speed

How to Fix

Replace torque converter and service valve body. Full ZF fluid and filter change every 50,000 miles extends transmission life.

What Owners Are Using

Parts and tips from 288+ owners who fixed this issue

UpgradeZF 8HP Transmission Filter Kit (ZF #1087.298.361)
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Typical repair cost:$2,500 - $6,000

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Community Reported

High Confidence288 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Community Reported

243 owners

On the 2013-2024 Audi S8 4.0T, the S8 4.0T V8 shares coolant line issues with other 4.0T Audi models but the heavier sedan and higher power tune accelerate wear. Turbo oil and coolant line failures can cause expensive damage if not caught early.

This issue also affects: Audi A8, Audi RS6, Audi RS7

Common Symptoms

Coolant loss
Turbo oil leak smell
Overheating warning
White exhaust smoke
Low coolant light
Oil in coolant or coolant in oil

How to Fix

Replace all turbo coolant and oil feed lines preventatively at 60,000 miles. Monitor coolant levels closely.

What Owners Are Using

Parts and tips from 243+ owners who fixed this issue

UpgradeTurbo Oil and Coolant Line Kit (Genuine Audi #079145735E)
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Typical repair cost:$1,000 - $3,500

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243+ owners have reported this issue

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Community Reported

High Confidence243 reportsLast reported by owners Mar 2026Reviewed Mar 2026

Frequently Asked Questions

What are the most common Audi S8 problems?

According to Au7o's analysis of 823+ owner reports, the 2020-2020 Audi S8 has 4 documented issues. The most frequently reported are: Adaptive Air Suspension Multi-Point Failure, ZF 8-Speed Torque Converter and Valve Body Issues, 4.0T Turbo Coolant System Degradation. Of these, 4 are rated critical and should be addressed promptly.

Is the Audi S8 reliable?

The 2020-2020 Audi S8 has 4 known issues documented across 823+ owner reports. 4 issues are rated critical: Adaptive Air Suspension Multi-Point Failure and ZF 8-Speed Torque Converter and Valve Body Issues and 4.0T Turbo Coolant System Degradation and Air Suspension Strut Leak and Compressor Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi S8 problems?

Repair costs for known Audi S8 issues range from $1,000 to $20,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Adaptive Air Suspension Multi-Point Failure, typically costs $1,200-$4,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2013-2024 Audi S8 Adaptive Air Suspension Multi-Point Failure?

The S8 full-size luxury sedan places extreme demands on the air suspension system. All four struts and the compressor commonly need replacement between 60,000-100,000 miles. The heavy curb weight accelerates bladder wear. Repairs typically run $1,200-$4,500. Severity: high.

What is the 2013-2024 Audi S8 ZF 8-Speed Torque Converter and Valve Body Issues?

The S8 high-torque application stresses the ZF 8HP torque converter and valve body. Shudder, delayed shifts, and harsh engagement develop as the converter clutch wears and valve body solenoids degrade. Repairs typically run $2,500-$6,000. Severity: high.

What is the 2013-2024 Audi S8 4.0T Turbo Coolant System Degradation?

The S8 4.0T V8 shares coolant line issues with other 4.0T Audi models but the heavier sedan and higher power tune accelerate wear. Turbo oil and coolant line failures can cause expensive damage if not caught early. Repairs typically run $1,000-$3,500. Severity: high.

What is the 2013-2022 Audi S8 Air Suspension Strut Leak and Compressor Failure?

The Audi S8 (2013-2022) uses an adaptive air suspension system with electronically controlled air struts that are prone to failure. The air springs (bellows) develop leaks from rubber deterioration, UV exposure, and road debris damage. A leaking air spring causes the affected cor… Repairs typically run $1,500-$20,000. Severity: high.

2020 Audi S8 Problems: 4 Issues Every Owner Should Know

All 4 Known Issues

When Issues Typically Appear

2013-2024 Audi S8: Adaptive Air Suspension Multi-Point Failure#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2013-2022 Audi S8: Air Suspension Strut Leak and Compressor Failure#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2013-2024 Audi S8: ZF 8-Speed Torque Converter and Valve Body Issues#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2013-2024 Audi S8: 4.0T Turbo Coolant System Degradation#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

Other Audi Models

Frequently Asked Questions

What are the most common Audi S8 problems?

Is the Audi S8 reliable?

How much does it cost to fix common Audi S8 problems?

What is the 2013-2024 Audi S8 Adaptive Air Suspension Multi-Point Failure?

What is the 2013-2024 Audi S8 ZF 8-Speed Torque Converter and Valve Body Issues?

What is the 2013-2024 Audi S8 4.0T Turbo Coolant System Degradation?

What is the 2013-2022 Audi S8 Air Suspension Strut Leak and Compressor Failure?