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Service bulletins for the 2021 Audi S8

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1150 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Exhaust and emissions are shown. Show all

Bulletins, newest first
A0123782071318_22023-10-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides information for when the MIL is on, there is a whistling noise, leaking air Bank 2 - DTC P2ADF00, Engine Crankcase breather.
A0123722071318_12023-09-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides information for when the MIL is on and a whistling noise can be heard, DTC P2ADF00.
A0123592069351_32023-07-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides information on when the engine crankcase breather has a whistling sound, and DTC P227900 is stored.
A0123442069351_22023-03-06. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This bulletin provides instructions for when the exhaust warning light is ON and/or a whistling noise can be occasionally heard from the engine compartment; DTCs P227900 may be present.
A0123432069351_12023-03-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This bulletin provides instructions for when the exhaust warning light is ON and/or a whistling noise can be occasionally heard from the engine compartment; DTCs P227900 may be present.
Dealer 15i52022-06-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Engine Intake & Exhaust Valve Springs
Circular 15i52022-06-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Engine Intake & Exhaust Valve Springs
A0120832060429_12020-09-03. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This bulletin contains instructions for when there may be a noise from the exhaust flap or there are DTCs sporadically stored in the ECM.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.