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 2001-2003 Audi S8 D2 4.2 V8 Timing Belt and Tensioner Service (Interference Engine)?

The first-generation D2 S8 uses the 4.2L 40-valve V8, an interference engine driven by a timing belt (intake cams) plus chains (exhaust cams). The belt is a maintenance-critical, age-and-mileage-limited item: Audi specifies replacement around 105k miles, but many specialists reco… Repairs typically run $1,000-$2,500. Severity: high.

What is the 2007-2012 Audi S8 5.2 V10 Timing Chain Tensioner / Guide Wear (D3 Cold-Start Rattle)?

The D3-generation S8 uses the 5.2L FSI V10 (shared lineage with the Lamborghini Gallardo/R8 V10). Its timing is driven by chains with plastic guides and hydraulic tensioners located at the rear of the engine. Over time and with deferred oil changes, the tensioners and guides wear… Repairs typically run $2,500-$6,000. Severity: high.

What is the 2013-2018 Audi S8 Water-to-Air Intercooler Internal Coolant Leak (Coolant into Intake)?

The 4.0T uses a compact water-to-air charge-air cooler mounted in the hot 'V' between the cylinder banks. The intercooler core can develop an internal leak that allows engine coolant to weep directly into the pressurized intake path. Owners report slow, unexplained coolant loss w… Repairs typically run $1,500-$3,500. Severity: high.

What is the 2020-2026 Audi S8 2020-2026 S8 Rearview/Top-View Camera Image May Not Display - Recall 25V900?

NHTSA recall 25V900 / Audi 90TV covers certain 2020-2026 S8 vehicles. Software may not be robust enough to recover a camera communication failure, so the rearview or Top View image may fail during a driving cycle and reduce rear visibility. This record is limited to 90TV and does… Severity: high.

What is the 2020-2021 Audi S8 2020-Early 2021 S8 Coolant-Pump Leak - Diagnosis Required?

Audi TSB 2065040/4 covers 2020 S8 vehicles and 2021 S8 vehicles through VIN 012194 with the 4.0 TFSI when a coolant warning, overheating or coolant loss is present and workshop diagnosis identifies the coolant pump as the leak source. It does not validate the former 2013-2018 the… Severity: high.

What is the 2013-2016 Audi S8 2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057?

NHTSA recall 19V057 / Audi 20BM covers certain 2013-2016 S8 vehicles. The low-pressure supply line feeding the high-pressure fuel pump can become porous, causing fuel odor or leakage; fuel near an ignition source increases fire risk. The affected line is not itself a high-pressur… Severity: high.

What is the 2013-2017 Audi S8 2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178?

NHTSA recall 22V178 / Audi 21H7 covers certain 2013-2017 S8 vehicles. Carbon or deposits can block the turbocharger oil-supply strainer, reducing bearing lubrication. Bearing wear can allow the turbine wheel to contact the housing or the shaft to break, causing loss of power or e… Severity: high.

What is the 2020-2024 Audi S8 2020-2024 S8 Air-Suspension Malfunction with J1135 Communication Fault - Diagnosis Required?

Audi TSB 2059363/4 covers an air-suspension malfunction on 2020-2024 S8 vehicles when the suspension controller stores C1260F0 for no communication with the compressor control unit or U112100 with symptom code 262400 for a missing message. The bulletin identifies the electrical p… Severity: medium.

What is the 2013-2015 Audi S8 2013-2015 S8 COD Vibration with J931 Basic-Setting Fault - Diagnosis Required?

Audi TSB 2036392/6 covers 2013-2015 S8 4.0 TFSI vehicles with vibration around 1000 and 3000 rpm and possible B201000 or B200500 in the sub-frame mount controller J931. Work on electrical-system controllers J519/J520 can deactivate J931 active-mount basic settings. The bulletin d… Severity: medium.

What is the 2013-2018 Audi S8 Direct-Injection Carbon Buildup on Intake Valves (Misfires / Rough Idle)?

Like other VAG direct-injection engines, the 4.0T runs port-bypassing direct injection, so no fuel washes the back of the intake valves. Carbon deposits accumulate on the valves and ports over time, restricting airflow and degrading the seal. Owners report a gradual power loss, r… Repairs typically run $600-$1,400. Severity: medium.

What is the 2020 Audi S8 2020 S8 Starter-Alternator Emissions Service Action 27BQ - VIN Check Required?

Audi Emissions Service Action 27BQ covers certain 2020 S8 vehicles. A defective starter-alternator may inhibit the start-stop system, increasing carbon-dioxide and other emissions while the vehicle is stopped, although Audi states that emissions remain within standards. This is a… Severity: medium.

What is the 2007-2018 Audi S8 Clogged Sunroof / Plenum Drains Causing Water Intrusion and Electronics Damage?

Like other large Audi sedans, the S8 relies on sunroof drain channels and cowl/plenum drains to route rainwater away from the cabin and the electronics housed in the plenum area. The plastic drain connectors and channels become brittle and crack, and the plenum drains clog with d… Repairs typically run $200-$3,500. Severity: medium.

What is the 2013-2018 Audi S8 2013-2018 S8 Warm-Soak Long-Crank or No-Start - Fuel Diagnosis Required?

Audi TSB 2046724/5 covers sporadic warm-engine no-start or long cranking after the vehicle sits without fully cooling. A rich-mixture DTC may occur, but often there is no DTC. Audi’s procedure distinguishes fuel in the oil from a short-trip profile, ECM software, high-pressure in… Severity: medium.

What is the 2020-2023 Audi S8 2020-2023 S8 High Oil Consumption and Updated Piston Rings - Diagnosis Required?

Audi TSB 2071114 applies to 2020-2023 S8 vehicles with the EA825 4.0L engine when the oil level is repeatedly low or measured consumption is excessive. Audi identifies a change to piston-ring geometry and an updated-ring production solution. This does not apply to the former 2013… Severity: medium.

What is the 2013-2016 Audi S8 2013-2016 S8 Warm-Idle Whistle from Crankcase Breather Leak - Diagnosis Required?

Audi TSB 2040644/6 covers a metallic whistling or grinding sound at warm idle, a sporadic MIL and possible P2279 or P0507 on 4.0 TFSI vehicles. A leak in the crankcase breather pressure-regulating module can cause the condition. Audi’s labor table explicitly includes the S8. Severity: medium.

What is the 2020-2021 Audi S8 2020-Early 2021 S8 Front Lower Guide-Link Hydro-Bushing Noise - Diagnosis Required?

Audi TSB 2058489/8 covers 2020 S8 vehicles and 2021 S8 vehicles through VIN 028090 with squeaking, creaking or rumbling from the front over uneven roads, sometimes perceived in the footwell or behind the dashboard. The lower guide-link hydro-bushing can be the source, and Audi no… Severity: low.

Audi · Known Issues

2001-2026 Audi S8 Problems: 19 Known Issues

2001-2026 model years · 823+ owner reports · Updated September 2026

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According to Au7o's analysis of 823+ owner reports, the 2001-2026 Audi S8 has 19 documented known issues, with 10 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), D2 4.2 V8 Timing Belt and Tensioner Service (Interference Engine) ($1,000-$2,500 repair), 5.2 V10 Timing Chain Tensioner / Guide Wear (D3 Cold-Start Rattle) ($2,500-$6,000 repair), Water-to-Air Intercooler Internal Coolant Leak (Coolant into Intake) ($1,500-$3,500 repair), 2020-2026 S8 Rearview/Top-View Camera Image May Not Display - Recall 25V900, 2020-Early 2021 S8 Coolant-Pump Leak - Diagnosis Required, 2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057 and 2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178.

Frequently Asked Questions

What are the most common Audi S8 problems?

According to Au7o's analysis of 823+ owner reports, the 2001-2026 Audi S8 has 19 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, 10 are rated critical and should be addressed promptly.

Is the Audi S8 reliable?

The 2001-2026 Audi S8 has 19 known issues documented across 823+ owner reports. 10 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 D2 4.2 V8 Timing Belt and Tensioner Service (Interference Engine) and 5.2 V10 Timing Chain Tensioner / Guide Wear (D3 Cold-Start Rattle) and Water-to-Air Intercooler Internal Coolant Leak (Coolant into Intake) and 2020-2026 S8 Rearview/Top-View Camera Image May Not Display - Recall 25V900 and 2020-Early 2021 S8 Coolant-Pump Leak - Diagnosis Required and 2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057 and 2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178. 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 $200 to $6,000, 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 year Audi S8 is the most reliable?

Reliability varies across model years of the Audi S8. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2001-2026 Audi S8 with 19 documented issues documented across 823+ owner reports.

All 19 Known Issues

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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 year Audi S8 is the most reliable?

When Issues Typically Appear

4.0T Turbo Coolant System Degradation#

Water-to-Air Intercooler Internal Coolant Leak (Coolant into Intake)#

2020-Early 2021 S8 Coolant-Pump Leak - Diagnosis Required#

2020-2026 S8 Rearview/Top-View Camera Image May Not Display - Recall 25V900#

2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057#

2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178#

D2 4.2 V8 Timing Belt and Tensioner Service (Interference Engine)#

5.2 V10 Timing Chain Tensioner / Guide Wear (D3 Cold-Start Rattle)#

2013-2015 S8 COD Vibration with J931 Basic-Setting Fault - Diagnosis Required#

Direct-Injection Carbon Buildup on Intake Valves (Misfires / Rough Idle)#

2020-2023 S8 High Oil Consumption and Updated Piston Rings - Diagnosis Required#

2013-2016 S8 Warm-Idle Whistle from Crankcase Breather Leak - Diagnosis Required#

Adaptive Air Suspension Multi-Point Failure#

2020-2024 S8 Air-Suspension Malfunction with J1135 Communication Fault - Diagnosis Required#

2020-Early 2021 S8 Front Lower Guide-Link Hydro-Bushing Noise - Diagnosis Required#

ZF 8-Speed Torque Converter and Valve Body Issues#

2020 S8 Starter-Alternator Emissions Service Action 27BQ - VIN Check Required#

Clogged Sunroof / Plenum Drains Causing Water Intrusion and Electronics Damage#

2013-2018 S8 Warm-Soak Long-Crank or No-Start - Fuel Diagnosis Required#