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Audi S8Model year report

2015 Audi S8 Problems

Complaints
6filed with NHTSA
Median mileage
50,400miles, 4 complaints with mileage
Recalls
4campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
20 mpgcombined, 4.0L 8-cyl AWD · 16 city / 27 hwy

Sources: NHTSA records for the 2015 Audi S8 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 6 consumer complaints for the 2015 Audi S8. The part named most often is engine, with 5 complaints (83% of the total), followed by transmission and drivetrain (1). 4 of the complaints include a mileage, and 25% of those were filed for vehicles with under 50,000 miles; the median is 50,400 miles. NHTSA lists 4 recall campaigns and 690 technical service bulletins for this model year. Engine complaints overlap with 40 technical service bulletins filed under the same part. Transmission and drivetrain complaints overlap with 25 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Engine: “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.”

NHTSA complaint #11092001, filed 2018-05, 50,000 miles

Transmission and drivetrain: “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. …”

NHTSA complaint #11578521, filed 2024-03

Mileage when problems were reported

25% of the 4 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 50,000 and 50,800 miles.

0%0–100%10–2525%25–5050%50–750%75–10025%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (4 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 50,400 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

201812019120211202212023120241
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2015 Audi S8 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
S8 AWD4.0L 8-cyl8-speed automatic162720$4,100

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2015 Audi S8 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 690 on record; the latest 10 are shown.

See all 690 bulletins →

Other model years of the Audi S8

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2016637,5003—18—Not enough data
2015650,4004—20—Not enough data
2014658,0005—18—Not enough data
20131370,5005—18—Not enough data
20085127,0001—15—Not enough data

All Audi S8 model years

Frequently asked questions

How many NHTSA complaints does the 2015 Audi S8 have?

NHTSA recorded 6 consumer complaints for the 2015 Audi S8 as of Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2015 Audi S8 is reported most often?

Engine is named most often, in 5 complaints (83% of the total), followed by transmission and drivetrain with 1.

Has the 2015 Audi S8 been recalled?

NHTSA lists 4 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2015 Audi S8 get?

The EPA rates the 2015 Audi S8 (S8, 4.0L 8-cyl) at 20 mpg combined, 16 city and 27 highway, with an estimated annual fuel cost of $4,100 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2015 Audi S8 reported?

Among the 4 complaints that include a mileage, the median is 50,400 miles and the middle half falls between 50,000 and 50,800 miles; 25% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.