Service bulletins for the 2014 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.
1384 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Exhaust and emissions are shown. Show all
| Circular-Emissio | 2018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 3.0 TDI vehicles were equipped with undisclosed Auxiliary Emission Control Devices which are not permitted by emissions regulations. Revised legal approved copy. |
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| E-mail 3.0L TDI | 2018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. E-mail - 3.0L TDI Gen 2 Emissions Compliant Repair (ECR) Approval |
| A231745 2049856- | 2018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This bulletin contain repair instructions for the TDI emission modification. |
| 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. |
| Email - 2.0L and | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 2.0L & 3.0L TDI Settlement Updates |
| e-mail 3.0L TDI | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. e-mail communication for 3.0L TDI Update - Claim Processing Appointments |
| Campaign Circula | 2017-11-17. 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 Circula | 2017-11-17. 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. |
| EMAIL - TDI UPAT | 2017-06-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. THIS EMAIL GIVES AN UPDATE ON THE CURRENT EMISSIONS ISSUES WITH REGARDS TO 2.0L AND 3.0L TDI VEHICLES. |
| EMAIL TDI UPDATE | 2017-03-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. THIS EMAIL GIVES AN UPDATE ON THE CURRENT EMISSIONS ISSUES WITH REGARDS TO 2.0L AND 3.0L TDI VEHICLES. |
| 24CO | 2017-03-16. 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. |
| A24165420440032 | 2017-03-14. 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. |
| 2017-03-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. THIS EMAIL GIVES AN UPDATE ON THE CURRENT EMISSIONS ISSUES WITH REGARDS TO 2.0L AND 3.0L TDI VEHICLES. | |
| A24165320440031 | 2017-03-03. 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. |
| A24165420440032 | 2017-02-23. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.