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2015 Audi

S8

Auto (S8), 8 cyl, 4.0 L, Turbo

Audi S8: best and worst years
2015 Audi S8 (photo 1 of 2)

Closest available photo (2016 model year); you're viewing the 2015.

2016 photoCalreyn88CC BY-SA 4.0via Wikimedia Commons

Overview

Transmission
Automatic (S8)EPA, from EPA, last updated 6/22/2026

Engine & performance

HP
520
Power to weight
0.111 hp/lb
Axle ratio
3.20

Efficiency

Smog score
5/10
SmartWay certified
No

Dimensions & capacity

GVWR class
Class 2E (6,001 to 7,000 lb)NHTSA vPIC, from NHTSA vPIC, last updated 10/13/2026

Safety NHTSA record NHTSA, model year

Stability control (ESC)
Standard
Forward-collision warning
Optional
Lane-departure warning
No
Recalls
4
Owner complaints
6 See on NHTSA

Reported problems NHTSA record NHTSA owner complaints, model year

  • ENGINE83%
  • POWER TRAIN17%

Source: NHTSA owner complaints, 6 total.

Audi S8: best and worst years

Federal investigations NHTSA record NHTSA defect investigations, model year

  • EA22001opened Apr 4, 2022ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN

    Engine Stall - Turbo Failure

  • PE21009opened Mar 29, 2021ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN

    Engine Stall - Turbo Failure

Known issues manufacturer service bulletins, model year

607 service bulletins filed with NHTSA for this model year

  • May 26, 2026UNKNOWN OR OTHERAOS-26-25

    This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the issue: The ODIS Audi Brand update 2.41.1 is setting a ODS5003E error code when you perform the 90TV SVM flash.

  • May 22, 2026ELECTRICAL SYSTEMTSB_2080517_4

    This bulletin provides informaiotn when the starter battery is discharged or defective.

  • May 6, 2026POWER TRAINTSB_2074808_4

    The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Added Model years

  • Apr 30, 2026ELECTRICAL SYSTEMTSB_2080517_3

    This bulletin provides informaiotn when the starter battery is discharged or defective.

  • Apr 30, 2026UNKNOWN OR OTHERTSB_2022032_12

    This bulletin provides diagnostic information for the vehicle locking system.

  • Apr 22, 2026UNKNOWN OR OTHERTSB_2070568_6

    This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool

  • Mar 27, 2026UNKNOWN OR OTHERTSB_2081531_1

    This Reporting obligation requests that technicians contact the Technical Assistance Center (TAC) when the diagnostic tester refers to this reportin gobligation or to TPI 2033392.

  • Mar 24, 2026SUSPENSIONTSB_2023187_8

    This bulletin provides informaiotn regarding squeaking noises when steering or maneuvering.

  • and 599 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
4 yr / 50k mi
Powertrain
4 yr / 50k mi
Roadside assistance
4 yr
Maintenance
3 yr / 30k mi
EV battery
8 yr / 100k mi

Source: media.audiusa.com as of 2026-06

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.