Total Complaints
6 filings
AUDI S8 · model year
6 NHTSA complaints, and 4 recall campaigns listed for this cohort. A VIN lookup is required to determine whether a specific vehicle has an unrepaired recall.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2015AUDIS8 carries 6 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. For crash performance, NHTSA's New Car Assessment Program gave this cohort an overall Not Rated/5 rating, with Not Rated/5 front crash, Not Rated/5 side crash, and Not Rated/5 rollover scores derived from standardized barrier and dynamic tests.
The most frequently selected component label in reports for the 2015 S8 is engine with 5 filings, followed by power train (1). Complaint categories reflect owner reports and intake categorization; they do not establish a defect pattern or cause. This cohort has 4 NHTSA recall campaigns listed below. Enter a VIN in NHTSA's official recall lookup to determine whether a specific vehicle has an unrepaired recall.
NHTSA currently has 9 investigation files overlapping the 2015 S8. Owners comparing this cohort against neighboring years should read the complaint-by-year trend as report volume, not a causal diagnosis. Use the related-complaint feed and the official recall lookup when researching a specific vehicle.
Total Complaints
6 filings
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| ENGINE | 5 |
| POWER TRAIN | 1 |
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.
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.
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.
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.
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. Issue appears to be common on the EA824 (4.0 twin turbo) engine with hundreds of reports from the complete range of EA824 equipped vehicles (S8, RS7, S6, S7, A8 etc). Average mileage of those reported are 65k miles or so. Hundreds of similar issues are reported via various Audi forums and social media groups. Poses a fire risk since coolant leaks all over the front of the engine. Poses another safety risk if the engine seizes due to overheating while in motion. Either would be catastrophic
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 to start the vehicle, but the vehicle was shaking while driving. The contact also stated the vehicle had stalled. The contact took the vehicle to an independent mechanic and was informed that the oxygen sensor and oil pressure switch needed to be replaced. The vehicle was repaired but continued to experience the failure. The contact took the vehicle back to an independent mechanic and was referred to a local dealer. The contact called the local dealer and made them aware of the failure. The vehicle was not diagnosed or repaired. The VIN was associated with NHTSA Campaign Number: 22V178000 (Engine and Engine Cooling). The manufacturer had been informed of the failure. The failure mileage was approximately 116,000.
Mileage: 116,000
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.
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 STARTING THE CAR AFTER A RESTING PERIOD AND CAR WOULD NOT START. LET IT SIT LONGER AND FINALLY GOT IT TO START BUT CAR HAD VERY LITTLE POWER WHEN PRESSING ON THE GAS , BUT I WAS ABLE TO GET TO MY LOCAL AUDI DEALER FOR A DIAGNOSIS. ($190.00 + TAX). I INFORMED THE TECHNICIAN OF THE ISSUES I SAW AND ALSO THAT I HEARD A WHINING NOISE COMING FROM THE ENGINE. DIAGNOSIS WAS THAT BOTH TURBOS HAD SIGNIFICANT "PLAY" IN THEM AND THEY NEEDED TO BE REPLACED. THE TECH SAID THAT THIS IS CAUSED BY AN OIL SCREEN DEEP INSIDE THE ENGINE, WHICH IS A KNOWN CAUSE OF THIS ISSUE. PRICE TO REPAIR WOULD BE $11,500.00!!!! IF THIS IS A KNOWN ISSUE AS AUDI STATES, WHY ISN'T THIS A RECALL ISSUE, ESPECIALLY WITH THE COST INCURRED BY CONSUMERS?
Mileage: 50,800
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.
Mileage: 43,750
I WAS DRIVING AT HIGHWAY SPEED WHEN THE ENGINE SUDDENLY STARTED TO SHUDDER AND LOSE POWER. THE CHECK ENGINE LIGHT IMMEDIATELY STARTED TO FLASH AND THE ENGINE STALLED. I WAS STOPPED IN A BUSY HIGHWAY DURING RUSH HOUR. I EVENTUALLY GOT THE CAR TO A SAFE LOCATION AND PULLED THE TURBO AIR INTAKE TO INSPECT THE TURBO WITH A BORESCOPE. THE BANK 1 TURBO HAD DAMAGED ITSELF. THIS SHOULD NOT HAPPEN ON A CAR WITH ONLY 50,000 MILES.
Mileage: 50,000
Data vintage: August 2026. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Every figure on PlainCars is rendered directly from NHTSA complaint and safety data, no number is typed in by an editor. This year-specific record is rendered from NHTSA ODI, recall, and NCAP rows for the 2015 AUDI S8; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.
Read our methodology - how this data is sourced, computed, and verified.