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2015 Audi S8 Base

All Audi S8 D4 trims (2013–2018) → All Audi S8 generations →
2015 Audi S8 – front Unverified
Photo: Audi S8 plus front (24401296301) by Zytonits, CC BY-SA 2.0, via Wikimedia Commons
Photos show the D4 (D4, 2013–2018); trim, color, and model year may differ.
All photo credits
  1. Photo: Audi S8 plus front (24401296301) by Zytonits, CC BY-SA 2.0, via Wikimedia Commons
  2. Photo: 2016 Audi S8 TFSi Quattro Auto by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
  3. Photo: AUDI S8 D4 (Typ 4H) China by Dinkun Chen, CC BY-SA 4.0, via Wikimedia Commons
  4. Photo: Audi S8 plus (D4) rear by Tokumeigakarinoaoshima, CC BY-SA 4.0, via Wikimedia Commons
  5. Photo: Audi S8 plus (D4) interior by Tokumeigakarinoaoshima, CC BY-SA 4.0, via Wikimedia Commons

The 2015 Audi S8 Base is a 4.0-liter turbocharged V8 with an 8-speed automatic and all-wheel drive. It is rated at 20 mpg combined.

EPA fuel-economy estimates are 16 mpg city and 27 mpg highway (20 mpg combined).

Spec Value
Vehicle
Body TypeSedan
PowertrainGas
Engine
Engine Type4.0L Turbocharged V8
Displacement4 L
Drivetrain
Drive TypeAll-Wheel Drive (quattro)
Transmission
Transmission8-Speed Automatic
Fuel Economy
City16 MPG
Highway27 MPG
Combined20 MPG
Recommended FuelPremium Unleaded

Safety & Recalls

NCAP safety ratings

Tested, but no star ratings were published (2015 Audi S8 4 DR AWD).

Recalls

4 recalls on file with NHTSA for the 2015 Audi S8. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.

Mar 23, 2022 · 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.

Consequence: Worn bearings can cause the turbine wheel to contact the turbocharger housing or cause the shaft to break, causing an engine stall and increasing the risk of a crash.

Remedy: Dealers will replace the oil strainer and perform an oil change, free of charge. Owner notification letters were mailed August 4, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 21H7.

NHTSA campaign 22V178000

Jul 7, 2020 · STRUCTURE:BODY:HOOD

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.

Consequence: If the seal contacts hot engine components, there could be an increased risk of a fire.

Remedy: Audi will notify owners, and dealers will install a retaining plate to prevent the engine compartment seal from loosening. The recall began September 4, 2020. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 51G6.

NHTSA campaign 20V397000

Jan 28, 2019 · 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.

Consequence: Leaking fuel, in the presence of an ignition source, increases the risk of fire.

Remedy: Audi has notified owners, and dealers will install a fuel pressure damper, free of charge. The recall began February 21, 2019. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 20BM.

NHTSA campaign 19V057000

Jun 25, 2018 · 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.

Consequence: A fuel leak in the presence of an ignition source can increase the risk of a fire.

Remedy: Audi will notify owners, and dealers will replace the fuel line, free of charge. The recall began July 20, 2018. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 20AV.

NHTSA campaign 18V430000

6 owner complaints to NHTSA for the 2015 Audi S8

Owner Complaints

6 owner complaints filed with NHTSA for the 2015 Audi S8. See all on nhtsa.gov

Most-cited areas
Engine5
Power Train1
A complaint can cite more than one area.
Most recent complaints
Mar 20, 2024 · Power Train
“Water Pump and thermostat has a faulty design that causes coolant to leak either around the O Ring and/or the elbow. I am in my third water pump and thermostat with only 69,000 miles on the vehicle…”
Feb 10, 2023 · Engine
“The contact owns a 2015 Audi S8. The contact stated he was unable to start the vehicle. The contact stated that the Electronic Power Control (EPC) warning light was illuminated. The contact was able…”
Feb 18, 2022 · Engine
“Turbo failure and positive crankcase ventilation (PCV) failure. Whining noise from PCV and smoke out the tail pipes with no power. Had to pay out of pocket to remedy issues.”
Mar 5, 2021 · Engine
“WAS DRIVING ON A SATURDAY AFTERNOON DOWN A BUSY STREET WHEN MY CAR STARTED SPUTTERING AND HAD VERY REDUCED POWER. I WAS ABLE TO EVENTUALLY GET TO THE SIDE OF THE ROAD AND SHUT THE CAR OFF. TRIED…”
Jun 2, 2019 · Engine
“ONLY 43,750 MILES AND THE ENGINE IS BEING COMPLETELY REBUILT. NEW CAM ADJUSTERS, NEW TIMING CHAIN TENSIONERS, NEW TIMING CHAIN GUIDES... THIS SHOULDN'T HAPPEN ON A CAR WITH SUCH FEW MILES.”

Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.

Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2015 AUDI S8. US-market vehicles only; data cached for up to 7 days.

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