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Service bulletins for the 2013 Audi S4

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.

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

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

Bulletins, newest first
A1720072060033_12020-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin contains repair instructions for when there are noises in the engine compartment with DTC P052E00.
Circular37K8REV12020-07-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Transmission control module (TCM) software designed and certified for a similar model/model year was used in vehicles affected by this action. It is undetermined whether there could be an impact to emissions. Updated claiming and parts information to add subframe crossbrace fasteners.
A011748 2040403-2018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This technical service bulletin instructs the reader to replace either a combi valve or vacuum solenoid valve depending on the circumstances under which DTC P244000 and/or P244200 were stored.
Campaign Circula2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). On certain Audi vehicles with 2.0L TFSI engine, the diaphragm of the crankcase pressure regulating valve may have been damaged. Inspect and, if necessary, install a repair kit for the crankcase pressure regulating valve.
Campaign Circula2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). On certain Audi vehicles with 2.0L TFSI engine, the diaphragm of the crankcase pressure regulating valve may have been damaged. Inspect and, if necessary, install a repair kit for the crankcase pressure regulating valve.
A351622203221142017-03-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. THIS TECHNICAL SERVICE BULLETIN PROVIDES INSTRUCTIONS FOR DIAGNOSING AN ISSUE WITH THE G676 SENSOR MODULE AND REPLACING IT.
TSB-01-13-162013-12-02. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. AUDI: DUE TO DEFECTIVE VACUUM ACTUATORS, SOME VEHICLES EXPERIENCE HIGH RPMS WITH A POWER REDUCTION, INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED (BANK 1 AND BANK 2) POWER AND VACUUM ACTUATOR NEEDS TO BE UPDATED. MODEL 2013 A6, A7, S4, S5 (CAB), Q7, Q5. *PE

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