What are the most common Audi S8 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Audi S8 has 5 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, 2013-2015 S8 COD Vibration with J931 Basic-Setting Fault - Diagnosis Required. Of these, 2 are rated critical and should be addressed promptly.
Is the Audi S8 reliable?
The 2015 Audi S8 has 5 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 2013-2015 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 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.
