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Service bulletins for the 2013 Audi A6

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.

1666 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.
AWA 19-032019-06-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin explains the warranty extension for the crankcase ventilation valve on certain 3.0L and 4.0L vehicles.
A2019162035073142019-06-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE. This bulletin contains repair instructions for when the MIL is on and the DTC P045600 is stored in the ECM. This document also applies to the 2015 A3 Cabriolet and the 2015 A4 Cabriolet.
A011894 20330012019-02-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This bulletin provides instructions on how to clean the secondary air ports if they have too much carbon and cause a restriction.
A171893 2040644_2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides repair instructions on diagnosing and replacing a leak in the crankcase breather module.
A011862 2050329_2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This bulletin contains repair instructions for when the MIL is on and there are one of several DTCs stored in the ECM.
A171789 20406442018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This bulletin provides repair instructions on diagnosing and replacing a leak in the crankcase breather module.
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.
A171783 2040644-2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides repair instructions on diagnosing and replacing a leak in the crankcase breather module.
AWA-13-072017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. As part of Audi's ongoing commitment to our environment, Audi is extending the Emissions Control Systems Warranty to cover cleaning of the engine cylinder head secondary air ports to remove carbon buildup under specific conditions to 10 years or 120,000 miles, whichever occurs first, from the vehicle's original in-service date for certain 2009-12 Model Year Audi vehicles with 3.2L engine, and certain 2009-2013 Model Year Audi vehicles with 3.0T engines. The vehicle's original in-service date is defined as the date the vehicle was delivered to either the original purchaser or the original lessee; or if the vehicle was first placed in service as a "demonstrator" or "company" car, on the date such vehicle was first placed in service. The warranty extension is fully transferable to subsequent owners. Audi has determined that under certain driving conditions, carbon buildup can occur in the engine cylinder head secondary airports. Due to the presence of specific fault codes caused by this carbon buildup, the Malfunction Indicator Lamp (MIL) on the instrument cluster may illuminate. The MIL is part of the on-board diagnostic system. In some locales, an illuminated MIL could cause the vehicle to fail an IM emissions inspection, vehicle registration application could be denied. Audi will diagnose, and if necessary clean the engine cylinder head secondary air ports to remove the carbon buildup at no cost to the customer as long as the vehicle is within the time and mileage limits of the warranty extension. This warranty extension covers only the diagnosis and cleaning of the cylinder head secondary air ports to remove the carbon buildup. Reimbursement is applicable only to the repairs described in this Warranty Bulletin.
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.
A171670 2040644-2017-10-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). A metallic whistling or grinding sound is heard from the engine compartment when the vehicle is at idle speed. The sound usually occurs when the engine is warm. The MIL is sporadically on due to DTCs being stored in the ECM. A leak in the crankcase breather module can cause this condition.
A171780 2040644-2017-10-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin provides repair instructions on diagnosing and replacing a leak in the crankcase breather module.
24CO2017-03-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ELECTRICAL SYSTEM:SOFTWARE. ON CERTAIN AUDI VEHICLES WITH A 3.0L TFSI ENGINE MANUFACTURED DURING A SPECIFIC PERIOD, THE DIAGNOSTIC THRESHOLDS FOR THE CATALYTIC CONVERTERS WERE PROGRAMMED TOO TIGHTLY IN THE ENGINE CONTROL UNIT. AS A RESULT, THE MALFUNCTION INDICATOR LIGHT (MIL) MAY COME ON EVEN THOUGH THE CATALYTIC CONVERTERS ARE WORKING PROPERLY. IF THE MIL IS ON, A VEHICLE WILL NOT PASS AN EMISSIONS INSPECTION.
A241654204400322017-03-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO DIAGNOSE AND REPAIR ISSUES WITH THE INTAKE MANIFOLD FLAP VALVE N316.
A241653204400312017-03-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); EQUIPMENT. THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO DIAGNOSE AND REPAIR ISSUES WITH THE INTAKE MANIFOLD FLAP VALVE N316.
A241654204400322017-02-23. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO DIAGNOSE AND REPAIR ISSUES WITH THE INTAKE MANIFOLD FLAP VALVE N316.
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.