According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2016 Audi S8 has 4 documented known issues, with 2 rated critical. The most serious are 2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057 and 2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178. DIY maintenance guides at au7o.io.
On the 2013-2016 Audi S8 4.0T TFSI V8, 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-pressure line.
Common Symptoms
Fuel odor in or around the vehicle
Fuel leakage near the engine fuel-supply path
How to Fix
Check the VIN for open recall 20BM and contact an Audi dealer without delay. The free remedy installs a fuel-pressure damper in the low-pressure fuel supply inside the tank. If fuel odor or visible leakage is present, avoid ignition sources, do not continue driving, and arrange dealer inspection/towing as appropriate. Do not buy a retail line or damper from the former card.
Owner tips & cautions
WarningIf fuel odor or leakage is present, avoid ignition sources and arrange prompt dealer inspection; verify recall 20BM by VIN.
On the 2013-2017 Audi S8 4.0T TFSI V8, 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 engine stall and increasing crash risk.
Common Symptoms
EPC, MIL or oil warning with reduced power
Unusual turbocharger noise, loss of power or engine stall
How to Fix
Check the VIN for open recall 21H7 and schedule the free Audi dealer remedy, which replaces the oil strainer and performs an oil change. If EPC, MIL or oil warning lights appear with unusual turbo noise, extended cranking, rough idle, loss of power or stalling, stop safely and arrange diagnosis. Turbo damage, warranty eligibility and any additional repair must be assessed by VIN and inspection; do not buy the former retail strainer.
Owner tips & cautions
WarningVerify recall 21H7 by VIN. If the engine loses power or stalls, move to a safe location and arrange dealer diagnosis rather than repeatedly restarting.
On the 2013-2018 Audi S8 4.0T TFSI V8, 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 injector leakage and high-pressure fuel-pump leakage rather than assuming one failed component.
Common Symptoms
Warm-soak no-start with normal starter operation
Long cranking followed by rough running for a few seconds
How to Fix
Have the dealer read DTCs and ODIS fuel-in-oil value, verify ECM software and perform Audi’s high- and low-pressure holding tests. If high-pressure behavior is abnormal, borescope the combustion chamber to identify a leaking injector. If low-side pressure builds correctly but drops more than 1.5 bar in the first 15 minutes, Audi says at least one HPFP may be leaking and directs replacement of both pumps plus an oil change. Select no pump or injector until the test identifies the path.
Owner tips & cautions
TipRecord engine temperature and how long the car sat before the hard start; do not approve pumps or injectors without the pressure-hold results.
On the 2013-2016 Audi S8 4.0T TFSI V8, 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.
Compare the sound with Audi’s reference condition and check whether opening the oil filler cap changes it. Read P2279/P0507 and rule out other intake leaks. When the sound matches and is affected by the filler-cap check, follow Audi’s oil-separator breather replacement procedure and renew required seals/consumables by VIN. Do not diagnose by oil-cap feel alone or order the former five-item parts list.
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.
Campaign #20V39700007/07/2020
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
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.
Campaign #18V43000025/06/2018
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
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.
Campaign #19V05700028/01/2019
VISIBILITY:SUN/MOON ROOF ASSEMBLY
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2013-2014 Audi A8 and S8 vehicles equipped with a standard sunroof, manufactured March 12, 2013, through July 15, 2013. These vehicles are equipped with a standard sunroof glass panel that may shatter.
Campaign #13V44800023/09/2013
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
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.
Campaign #22V17800023/03/2022
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2016 Audi S8 has 4 documented issues. The most frequently reported are: 2013-2016 S8 Porous Fuel-Pump Supply Line / Fire Risk - Recall 19V057, 2013-2017 S8 Blocked Turbocharger Oil Strainer / Stall Risk - Recall 22V178, 2013-2018 S8 Warm-Soak Long-Crank or No-Start - Fuel Diagnosis Required. Of these, 2 are rated critical and should be addressed promptly.
Is the Audi S8 reliable?
The 2016 Audi S8 has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: 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.
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 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 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.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
